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HISTORICAL RESEARCH REPORTResearch Report TM/83/08
1983
Environmental conditions at Linby Colliery, 1981/82 Sinha MM, Annis R
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Environmental conditions at Linby Colliery, 1981/82
Sinha MM, Annis R This document is a facsimile of an original copy of the report, which has been scanned as an image, with searchable text. Because the quality of this scanned image is determined by the clarity of the original text pages, there may be variations in the overall appearance of pages within the report. The scanning of this and the other historical reports in the Research Reports series was funded by a grant from the Wellcome Trust. The IOM’s research reports are freely available for download as PDF files from our web site: http://www.iom-world.org/research/libraryentry.php
HISTORICAL RESEARCH REPORTResearch Report TM/83/08
1983
ii Research Report TM/83/08
Report No: TM/83/8UDC 622.872
Environmental Conditionsat Linby Colliery
1981/82
M.M. SinhaR. Annis
August 1983
Environmental BranchInstitute of OccupationalMedicine8 Roxburgh PlaceEDINBURGHEH8 9SU
(Telephone Noj 031-66? 5131)
i*
Report No : TM/83/8
INSTITUTE OP OCCUPATIONAL MEDICINE
Environmental Conditions at Linby Colliery 1981/82
by
M.M. Sinha and R. Annis
CONTENTS
SUMMARY
1. INTRODUCTION
2. LINBY COLLIERY
2.1 Colliery details
2.2 Ventilation and dust control
2.3 Manpower and occupational groups
3. SAMPLING PROGRAMME
4. RESULTS AND DISCUSSION
4.1 Faceworkers
4*2 Non-faceworkers
4*3 Relationship between control point and face concentrations
4*4 Total dust measurements
4*5 Measurement of nitrous fume
4*6 Environmental summary
5. OTHER INVESTIGATIONS
5.1 Sampler trials
5.2 Radioactivity measurements
REFERENCES
TABLES ?t 8 and 11.
ii,
Report No : TM/83/8
INSTITUTE OP OCCUPATIONAL MEDICINE
Environmental Conditions at Linby Colliery 1981/82
by
M.M. Sinha and R. Annis
SUMMARY
Respirable dust concentrations at Linby Colliery are tabulated forthe period April 1981 to July 1982, when the Pneumoconi'osis FieldResearch sampling programme was terminated. Information regardingseam worked, outputs, method of working, dust control and manpower,together with the associated respirable dust concentrations, ispresented in a series of face charts•
The mean coalface respirable dust concentration at Linby Collierywas 3.2 mg/m3 for 1981/82 and 3.6 mg/m3 for the period April toJuly 1982.
The total dust concentrations are given and were on average six timeshigher than the respirable dust concentrations. The shift meanconcentrations of nitrous fume observed,are also listed.
The composition of the dust will be reported later, as an addendumto this technical memorandum.
2.
The annual output is approximately three per cent higher than forthe previous year, 1980/81,
2.1.3 Method of working Five power-loaded faces were worked duringthe survey period, with up to four being in production at any one time.The same method of work (see Tables 2a - 6b) was adopted on all thefaces except that, on A20's face, the tailgate was not fully mechanised.
One face heading (A20's) was driven during this period with a ThinSeam Miner. All other headings, which were in mixed strata, were bored,fired and power loaded.
2.2 Ventilation and dust control
2.2.1 Ventilation All faces were ventilated antitropally. Theaverage air quantities, temperatures and relative humidities are shownin Tables 2a - 6b.
Exhaust ventilation systems were adopted in 50 per cent of the headings.The average quantity of air ventilating each of the various headingswas 3.6? m3/s. All these ventilation data were obtained from theColliery records*
2.2.2 Dust control The dust control equipment for faces is shownon the face summary charts (Tables 2a - 6b). On A2's face, spraysfixed to the roof supports were directed onto the conveyor. Where,as in Ad's and All's, an advanced heading was driven at the intakeend of the face, the air from the heading was passed through a drydust filter before it was allowed to re-join the main air current,thus reducing the dust level at the intake end of the face.
In headings, all cutting and loading machines were provided with sprays.Martindale Type *Uf respirators were freely available to all workmen;some 58 men were regular users, and however, on average, 68 respiratorswere serviced per day.
2.3 Manpower and occupational groups
The colliery population at the end of the period under review was 1105,of whom 329 (30 per cent) were classified as faceworkers, 564 (51 per cent)as non-faceworkers and 212 (19 per cent) as surface workers. The numberof occupational groups in use at the end of the period was 37t split asfollows:-
Pace groups 21Elsewhere underground 13Surface 3
3. SAMPLING PROGRAMME
The sampling and evaluation were carried out as before (SINKA & ANNIS,1981). Sampling underground was done by some 37 volunteer instrumentcarriers (SINHA & THOMAS, 1972), with a target of 17 samples per volunteerin the 17 months period. The collection of 48 per cent of the sampleswas supervised by the unit's investigators, who also took the surfacesamples.
INSTITUTE OP .OCCUPATIONAL MEDICINE
Environmental Conditions at Linby Colliery 1981/82
by
M.M. Sinha and R. Annis
1. INTRODUCTION
The environmental measurements of the Pneumoconiosis Field Research,which started in 1954» were terminated in July 1982. This reportlists and examines the measurements made at Linby Colliery duringthe period April 1981 to July 1982. The routine dust measurementswere made, as in the past, with the MRE Type 113A Gravimetric Sampler.The stratification of the manpower into occupational groups and themethod of sampling, almost exclusively by volunteer instrumentcarriers, were as described previously (SINHA, 1972).
The respirable dust concentrations for the faces are presented ina series of face summary charts. Total dust concentrations andthe levels of nitrous fume ar^ shown in the later tables.
2. LJNBY COLLIERY
2.1 Colliery details
2.1.1 Location Linby Colliery is situated about seven milesnorth of Nottingham in the Southern part of the NottinghamshireCoalfield.
2.1.2 Quarterly Outputs The quarterly outputs, all of which werefrom the High Hazel Seam (05:240)*, are given in Table 1.
TABLE 1,
Colliery Outputs (tonnes)
^ - - ^ ^ Pace
Period ~"~~— ---
April-June 1981
Juty-Sept. 1981
Oct. -Dec. 1981
Jan. -March 1982
TOTAL
April-June 1982
A2's
55 90245 15341 71443 060
185 809
28 722
A8's
23 93715 876
19 03516 797
75 645
21 037
All's
26 99040 629
46 31427 377
141 310
A17«s
49 97934 138
56 32460 049
200 490
36 178
A20's
16 191
16 191
43 181
Dev.
675581
2 372900
4 528
795
Total
157 483136 377
165 759164 374
623 993
129 913
TABLE 1
* National Seam Correlation Code
3.
The number of samples taken was as shown below:-
363
3718427
TOTAL 611
Pace
Development
Elsewhere underground
Surface
Although the composition of the routine samples will be reportedlater, Gelman VM1 filters were used for the monthly samples takenat the face control points. These have been analysed for quartzand the results are shown on Tables 2a - 6b.
4. RESULTS AND DISCUSSION
4.1 Paceworkers
The face summary charts (Tables 2a-6b) show the mean concentrationsof respirable dust for the face occupational groups for each quarter.Table 7 shows the annual mean group concentrations. The mean ofthese group concentrations was 3.6 mg/m3. Man weighted face meandust concentrations have been calculated from the data in Tables 2a-6b, the mean of these for 1981/82 was 3.4 mg/m3. and 3.6 mg/m^ forthe shorter period April - July 1982, (Table 11). With theinclusion of the preparation shifts, Table 11 shows the mean coalfacerespirable dust concentrations for 1981/82 as 3.2 mg/m^ and 3.6 mg/m3for the period April - July 1982, similar to the values for 1980/81.
4.2 Non-faceworkers
4*2.1 Development workers The mean respirable dust concentrationfor these workers are shown in Table 8. A breakdown by type ofstrata is given in Table 9 below. The dust concentrations in thecoal and stone headings (mixed stone and coal) were similar.
TABLE 9
Dust concentrations in Development Headings
Type ofHeading
Coal
Stone
No. ofSamples
730
Mean Resp.Dust Cone.mg/nP
3.6
3.3
Mean TotalDust Cone.mg/m^
10.519.0
RatioTotal Cone.Resp. Cone.
. 5-75.8
The development mean concentration was 3.3 mg/m^ (Table 11)
4.2.2 Elsewhere underground workers Mean respirable dust concentrationsfor the various elsewhere underground workers groups are shown in Table 8.
TABLE 2a FACG SUMMARY
SvMrn N.C.O.Seam Coir. Cc.M llv.k %
Code Co-Jo OK Ion
High Hazel 05:240 802/902 82.8
SiloMethod of Working
Machine details ..
Dust Suppression
Supports
Sito
Occuoai:,™(Filling Shifu)
O.G.S.N.
1 Number of Min lr» Occupational Group
! . Mcen Kcsplnblo Ut Quarter
! Dust Jnd Qu'-'tcr
Conccntrstion ' 3rd Qo.irtcr
fnrOrrupMlor, ^Quarter
mg/m* Year 1981/82i
Kcan S:implo Concentration
. for Sito m^fm*i Ash Concentration cng/in*
{ Qjjrii Concentration • rnj;/m'
Site
\ Occupation(Preparation Shift*)
] O.G.S .s.
Number of r'ltn in Occupation;! Group
Mean Rcspirabc Dust Concentration
for Occupation mp./m*
1'ican Sample Concentration '
for Sito mc/m*
Ash Conccntr.ilion mg/m*
Quartz Concentration mj/m*
FACO Frco Typo of Faco Lcnp.th Ik ich
Date Dato'" Single unit""" . longwallJune 1980 advancing
LOADERGATE .Half heading syst'em. Firedand power loaded.
Eimco (49kW) loader 112 kWPanz«ri 49k¥ stageloader,
External sprays on loaderand transfer points. . Gel Stem
Arches 3.67m x 2.74m
1Rippers (T/6) Face Tradesmen
F510
15
F330
6
4.2 ( 1)2.9 ( 6)
2.4 ( 3)2.3 ( 3)
2.7 (13)
1.5 (D
2.8 (1)
3.4 (1)
2.1 (3)
2.6(16)0.56*
INTAKE STABLEFired and hand filledFloor dint •
•
Gel stemming
tiroetsftiiel bars o3:.HSJDowry DuKe. Kyarualic props3
Stablemen (Intake)
F511
9
4.1 ( 6)
2.5 ( 3)3.6 ( 2)
3.8 ( 1)
3.6 (12)I I 1 I I . 1 I r - - i i l . i l i . !
3.6 (12)1.36*
•
. — . .
• '
Notes:I. Average Sampling Time 7.01 h but 5*41 h at Site 8
3.
( ) Number of Samples
:HAI;T A 2s5.
(;ACG
t>!iHi Cyc'u
"FillingPillingPilling
Aycr.if.o Hoof Seim Hccr
'Xl s"' l Seatearth 'Mudstone 1.09m
294 tonne
'PACEPower loaded
Double Ended Conveyormounted Trepanner( 2x45 kW motors )External sprays ontrepanner. Also twosprays on roof supports
Dowry 5/1 50 chocks
. '4[Machine Ops,
&proppersP512
18
4.7 ( 4)
.2.6 (12)
3.3 ( 5)
3.1 ( 5)
3.2 (26)
TPace TracLesme
P330
3
2.2 (3)
3.2 (3)'
3.1 (29)1.41*
-
- 4Machine Ops& Proppers
P512
1.6(1)
.
••
RETURN STABLE
Om of face at the returnnd worked by a secondower loader
BJD Single Ended RangingDrum Shearer (B59) 75kW
nternal sprays (pick faceflushing)
Dowty 5/150 chocks
5stablemen (Return)
P5136
3.8 (3)
3.0 (2)2.8 (2)2.6 (2)
3.1 (9)
3.1 (9)1>03*
* Avor.vnVcnUhilonQuality
7.96 mVs
TAILGATE
Mechanised in-line rip
Do sco UTR (37^49 kW)112 kit panzer
Internal sprays (pick.face flushing)
Arches 4<
f
Kippers
• F514
94,6 I4.2
2.6
3.5
,<>1m x 3.05m
( in / f \ i i i i -T/fel
[ 3)
( 7)
( 3.)
( 5)
3.8 (18)
3.8 (18)..1.24* .
•
•
•
*
•
Tf.mr7?;iit(.r7"""(rDry 23.8 !Wet 22.7
1 H.H. gW
IXEKAIUCS
roof coal -0.15m
floor dirt - j0.15m
59kg ofexplosives usedper day
++ 0
ControlPoint
5.3( 3)
4.3( 3)
3.2( .4)3.9( 3)
• • ' •" ~
\Vtio !o
fccc-.
i
ii
4.1(13)1.41*
0.31(13
3.1+
)
i
r,v.o
<
Notc>:S.
6.
7,
0.
* '" Standard Divls •J- Msn-wulcMcd Mc:.nh-H Samlped for time at face only.
TAW r 2a
< 6 .TABLE 2b TACG SU.'-iMARV
Sewn
High Hazel
s i t o ' • "
Ccur.Code
05:240
N.C.U.Cr.M Rv.k
802/902
ry
C'irl.on
82.8
StartingDate
June 1980
ftca 'Flnlilili."
Doto
Type: of Foco
Single unitLongwallAdvancing
LcTip.il>
275m
LOADERGATE
109m
INTAKE STABLEMethod of Working ialf heading system, Fired and
power loaded • •Hired, anonandFloor dint
Machine Details Simco (49kW/ Loader 1l2kW panzer ,stageloader.
DUST Suppression jJxternal sprays on loader and .;ransfer points. Gel stem.
Gel stemming
Supports drones 3.67m x 2.74m Groetschel bars or RSJDowty Duke hydraulic props
Sito 1
Ripper (L/G)
O.G.S.N.(Filllnj; ShifU)
Fc.Tradesmen
F330
St ablemen (Intake)
1 K'umber of Kin In Occupational Group 15.K«p!nblo
Dust
(or Occupation
mg/m*
lUQuirtcf >.8(l) 2.7(1)
3rd Qu.irtcr
llh QuDiler
Year 1982/83 2.8(1) 2.7(1)
3.3(1)
3.3(1)| Kcon S:irnp!o Concentration
! (or Sito
2.8 (2)0.07*
3.3(1)
tAsh Concentration
{ QjDrii ConccntrsUon
Site
Occupation
O.G.S .s.(IVcp:rot!on Slilf
of l-'ion in Occupiitionil Group
I lean ftcspir^bi';: Dust Conccntrolicn
(or Occupation mp./m*
5 Hcon Somplc Coticcntration
(cr Sito
Ash Conccnintion
• Quartz Concentration\—__
mg/m*
Notes:I. Average sampling time 7.21h but 5»20h at Site 8
( ) Number o( Samplci
:n/avr A2s FACT"
5ti!fi Cy:!o Ay.v.ij'.o-..., .. ,, . „..„.„>».,..., Ou*. i'i;t
Pilling |x.Tb'ii!itPilling ~"*~" "Filling 210 "tonne
Kccf Scim Floor Avor.yr-n— . .i. . . .~ _... . .. .....-— ,.v. — _..^_.. . ... .• .... Vcnlll ' iilon
Qojrully
Mudstone Seatearth m^/s
PACE ' I RETURN STABLEi'ower loaded
Double Ended ConveyorMounted Trepanner (2 x45kW motors )External sprays onirepanner. Also twosprays on roof supportsat loadergate endDowty 5/150 chocks
4• . ' • — - . * * V
fl/C Ops and ProppersP512
——————— — • ' ' ' • ' •18
3.4 (5)
i _
3.4 (5)
3.4 (5)1.92*
.
20m of face at the return endworked by a second power loaderBJD Single Ended Ranging DrumShearer (B59) 75k¥
Internal sprays (pick faceflushing)
Dowty 5/150 chocks
5Stablemen Pace Tradesmen(Return)P513 P330
6 62.8 (5) 2.3 (1)
2.8 (5) - 2.3 (t)1
2.7 ^6) ,. , . ':
.. 0.67*
... ,., ru , , , , - - - . . _ ., - -, - - - - „ - - , ._ ,
TAILS ATEMechanised in-line rip
Dosco UTR (37 +49 kW)112 k¥ panzer
Internal, sprays (pickface flushing)
Arches 4.27m x 3.05m
7Ripper (T/G)
P5U—^ •.—.-_ .—.. ..,„.•••-.. >.^,«.». . i .^..•...—
92.8 (1)
. 2-8 (1)
2,.8 (1)
•
•• .
T^r.-VmT T'
—————— —-.—.^Dry -Wet -U.H. -
(UIMAKIC-S
Roof coal-0.15ir
Floor dirt -
59 kg ofexplosives usedper day.
+'+ 0
ControlPoint
--1
4.3(3)1.08*
0.39(3)
\V!\o!o
fit?.
i
i
I
3.6+
MTrtt— .-i- njj^
i
J
5.
6, .
7.
0.
* " Standard D:\lilton++ Samlped for time at face only. r-fc
8.TABLE 3a FACE su:-iMAtvi
So.vn N.C.U.Se.vn Coir. CoM ll.ir.lc %
Ccxlc Co Jo C.ulonJ
r.icoStarting F
Date
High Hazel 05:240 802/902 82.8 October 197?
Silo
Method of Working
Machine Details .
Dust Suppression.
Supports
Sito
Octu-of.in(Filling Shifts)
O.G.S.M.
! Number of Kin In OrcupationM Groupii . Mctn Rcsplrablo Itt Quarter
LOADERGATE
F?co Type; of Faco U-np.tlt IKii;ht
Dot'o" Single Unit— Longwall 260m 1.09m
Advancing i
Half heading systemFired and power loaded
Eimco ^49kWJ Loader 112kW panzer-49kW stage loaderExternal sprays on loader and transfer.points Gel Stemming
Arches 4.27
1Rippers (ly& )
F500
10
4.3(2)
Dujt 2ndQu-,.-tcr j
Concentration ' 3rd Quarter
^cVn-jvM.™ <lh Quarter
mg/m* Vcari „„ L _ .
[ Mcon Sarnplo Concentration
for Sito mf;/m*i Ath Concentration fnp/m*t
Qujrti Concentration • rnf;/m*1
Site.
Occupation(IVcparatlon Slilfts)
O.G.S .s.
Numlwr of l-'it:n In Occufii'.ion:! Groio
Hcan Rcspirabi'c Dust Concentration
for Occupation mn/m*
(lean Sample Concentration
for Sito rorjfrn*
Ash Conccnirntion m£/m*
Qiiartz Concentration mj/m'
3.0(1)
3.9(4)
3.9(4)
m x'3.05m
.<"-.
Face' Tradesme]
F330
4
3.1(1)
3.1(1)
3.6(6)0.65*
a Face Officials
E50
3
3.1(1).
3.1(1)
ti
INTAKE STABLEFired and hand fUlecFloor dint
Gel Stemming
Qroetschel bars.Hydraulic props
3Stablemen (intake)
F501
6
5.6( 3)
4.4( 1)4.9( 2)2.7( 4)
4.2(10)
4.2(10)1.80*
..
. • • •
• - _ . ' _
Notes:1. Average sampling time 6,94h but 5.32h at Site 8
2. ' • •
3. ' '' . . ' - '
( ) Number of Samples
:HAIYT
Sli l f i Cycle-. . — ......FillingPillingPreparation
Power
AY'^f.*u'0 KcofOu'.i'lJt — -
IXT Si iKl
164 tonne Mudstone
PACEloaded
•Double Ended Conveyor HauntedTrepanner (2x45kWj MotorsExternal Sprays
Dowty Thin Seam (5/150)Chocks
V>jierallibrkezsP53
.1
2.8(1)
•
2.8(1)
• • ' ' ' -— —
RETURN.
' A8's FA(*"t...»«.•_» ••— .. ...I. . p.. •-..»« ...I.,...,. «l»l «.. ,~t, .••!.•. • ...,-.» •.•.•»•>•»•*.! II. ••!• • »l. ..»-... . — ~~...«~»~.. .^. »._.*. -~.-«
Scim I'-lcor Avor.vnVV.nt!!'iil»n ,
Quciriilty
1.09m seatearth 7.25 ^/s
STAM.E10m of face at the returnend worked by a secondpower loaderBJD Single Ended RangingDrum Shearer (B59) 75k¥Internal Sprays (pick faceflushing)
Dowty Thin Seam •(5/150) Chocks
5KfechineOprs Pace Officials Stablemen (Return)&proppers
F502 E50
U
4.rte::.
3.34.6
>- . . . , 1 . ; . , ,(1) 2.9(1)
121(4) '
4.1(7) 2.9(1)
3.9 (9)1 .60*
-
4General Jforkers
. E53.
- 3.2(2) .
• .
' \
F503
4.
3.2(
2J,J2(
5^4(2.6(
1)
J ^
J) ,
1)
3.3(4)
3.3(4)-'1-44*
•
•
• *•
TAILGATE
In-line mechanised rip
Dosco UTR (49*37 kW)Panzer (112 kW)Internal sprays (pick faceflushing )
Arches 3.67m x 2.74m
7TaceOfficials
E50'
...2
_ . • > . , .• * j r
4.2(1)5.2(1)
3.5(D
4.3(3)
•
RinpersT/G
F504
, 6 ....
3.9(1)
6.1(1)
5.2(2)
4.2(1)
•4.9(5)
4.4(16)0.88*'
FaceTradesmenF330
4
3.8(5)
•5-8(1)
3,9(1)3.8(1)
3.8(8)
7_ FaceTradesmen
F330
1.5(5)
. , .
• -••••••••..
Tcmr>?f,it>;ro C '_ „_
Dry 22.7 !
Wet 21.6IU-1. 91^
PvCKAKKS
Roof coal -0 .26m •
Floor -dirt -0.26m
14.4 kg ofexplosives usedper day
•¥+ 0
Control
Point
4,8 -C3)
3-^ (^)3.8,(j)3.9. (3)
4.0(11)1.31*
0.38(11)
•
—
\Vhclo
fie?.
3.8 +
iVV!v:.l:«
r«co
2.7
Notes:5,
6. .
7.
0.
* " Standard D:v!,it!on •[• H in-tt-ulcl itcd Mciri-H- Sanlped for time at face only.
YAIXIP 3a
TO. TABLE 3b TACG SUMMAIW
f.wrn N.C.O. F.uo ftco 'Sewn Coir. Cr.MRy.k % Sorting FlnWili i"
Ccxle Co-Jo Girlon Date Doto
High Hazel 05:240 802/902 82.8 Dctober 1979
SiloMethod of Working
Machine Details
' .Dust Suppression
Supports
Sito
Occupation(Filling Shifts)
O.G.S.N.
I Kumbcr of l-lin In Occupational Group
i . MctnHcspInblo In Quarter
i Duit *nd °u''tcr
Concentration ' ^cJ Quarter
. _ , llh Quarterlor OcrurvMlon J
cflg/m° Year 82/831 .... - ij Mcon. S:irnplo Concentration
for Sito mr;fm*i Avli Concentration inp/in*i
Qu?rti Conccntrstion ' ffifj/m*
Site
Occupation(Preparation Slilfn)
O.G.S .S.
Numlx-r of l-'itn In Occupation:! Group
Hcan Rcspirc'jio Dust Concentration
for Cccupniion mp./m*
1'ican Sample Concentration
for Sito rnc/m*
Ash Conccnimtion mg/m*
Quartz Conccntrntion mg/m*
LOADERGATEHalf heading system
Eimco (49kW; Loader 112kWpanzer. 49kW stage loader;
External sprays on loader andtransfer points«Gel stemming
Arches 4.27m x 3.05m
TypcofFoco Length IKi i ;M___._~-».. _..»_„..—— '—.,_.._„„ -..---...-.
Single UnitLongwall 260m 1 ,09mAdvancing
INTAKE STABLEFired and hand filled.Floor dilrt
Gel Stemming
.Groetschel barsHydraulic props
3Stablemen (intake)
F501
6
3.3 (1)
3.3 (1)
3.3 (1)•* —
•
.
•
Notes:l« Average sampling time 7.3th but 4»82h at Site 8
•2. ' .
3. ' "' . •
( ) Number of Sample*
JHAP.T A8s FACG
ot iHi -Cy ' tO AY^'f^'d_.^-_- . _ Ou'.i'Ut
Filling p'.T'.i;i!itPilling ~ """Preparation 164 tonne
,-"-- '; T jV .Z.'lu. T". .'.' ' "- '--"*" ' ~*,_,.V>J-r •*-— V V ^j.
PACEPower loaded
Double Ended ConveyorMounted Trepanner( 2x45kWY MotorsExternal Sprays
Dowty Thin Seam (5/150)Chocks
4M/Opprs and Proppers
P502
12•3.7 (D
, —
. 3.7 ( 1 ) 1
3.7 (D
-
Kcof Seim Floor Avor.vo-i I....UL.UJ . ... . — -• n . r , .. r,,-,-,! -.., . , „ -, , „ „ - . - —-.,-., Vl'lH'I ' l lI 'Ml
Qur-nll ty .Mudstone 1.09m Seatearth j~~
7.25 m /s
«^_ »».——,—,. -«-'«—»—— *.— •— — — .», «-^— ••
RETURN STABLE10m of face at the returnend worked by a second powerloaderBJD Single Ended Ranging DrumShearer (B59) 75kW
[nternal Sprays (PickTace flushing;
)owty Thin Seam(5/150) Chocks
5Stablemen (Return)
F503
4
3.6(2)
3.6 (2)3.6 (2)0.64
___ ,..*-. «—--.,— ,-,_L— ..._«-« — »^.«_.. »-,.._
: TAILGATE.'In-line mechanised rip
Dosco UTR (49^37 k¥) Panzer(H2kW)
Internal sprays (pick faceflushing )Arches 3.67m x 2.74m
7Rippers Face Face
Officials Tradesmen
F504 ' E50 F330
6 . 2 2
5.6 (1] 4-9 (1) 3.6 (1)
— > • • •
5.6 (1) -4.9'(1) 3.6 (1)
4.7 (3.)1.01*.
; : , , .
' ' • • " .
• •
•• ' . ; • '
Tcm:^r,,v."r7 ~C, „ .„
Dry 22.7Wet 21.6I^.H. 91^
— ^^r.'. — .-.. 'J ;.W ;
PvCMAKKS
Roof coal -0.26m
Floor dirt -.0.26m
14.4 kg of .explosives usedper day
•M- 0
ControlPoint
\Vho!o
Pace
1 i
—
5.9 (3)2.82*
0.67 (3;
•
4
3.9 *.__ — ___
i
F.v.o
1
Nolc>:S.
6,
7.
0.
* " Standsrd Deviation •{- 1-bn-tt-uIf.litcd MCT.O•H- Saralped for time at face only.
VAI»I K
12.TABLE 4 TACG SUMMAtW
f.wrn N.C.O. Faco Frco 'Sewn CCUT. CCA! ilv.k % Starting Flnliliin^
CcxJc CoJo Onion Date Doto
High Hazel 05:240 802/902 82.8 January 19c 0 Feb. 1982
SiteMethod of Working
Machine details
Dust Suppression
Supports
Sito
Occtnai'on(Filling Shifts)
O.G.S.N.
Number of Hin In Occupations! Group
Mean Ucsplrablo lit Quarter
Duit 2nd Quvtcr
Concentration ' 3rd Quarter
f.rOn,pM.0n 4lhQ«rlcr
rog/m* Yc3r8l/82
; l^itan S:irnplo Concentration
! for Sito ro^/m*
i A;h Concentration sn^/m*
Qu?rti Concentration ' fnt/m*1
Site
Occupation(Preparation SMfu)
O.G.S N.
NumVxrr of Kc:n in Occupitionnl Group
Hcan Rcspirabi's Dust Conccntralicn
for Occupation mp./m*
llcan Sample Concentration
for Sito ff»c/m*
Ash Conccntr.ition mc/m*
Qiiartz Concentration rnj/m*
LOADERGATE.Half heading system Fired.and power loadedEimco (49kW) loader, Panzer( 1 .12kW), Stageloader ( 49kW) .
External sprays on loaderand transfer points. Gelstemming.Arches 4.27m x 3.05m
1
Rippers
F505
152.0(1)
2.4 (4)2.2 (1)
1.9 (1)
2.2 (7)
2.2 (7)0.80*
Type; of Faco Lcnptli IKi;;ht""•"•*"••""' fi" *-»•'"• ' " " n-——-1—^^-.^.—.*— -••".* .1 .1
Single unit ?7t.longwall •?m " ,advancing
INTAKE STABLE
Fired and hand filledFloor diflt
.
Gel stemming
Groetschel bars/RSJHydraulic pumps
3
Stablemen
F506
9
3.8 ( 4)
2.3 ( 6}
2.7 ( 4)2.6 ( 3)'
2.8 (17)
2.8 (17)f.15*
•
.
•
Notes:I. Average.sampling time 7»00h but 5«l6h at Site 8
3. «':
( ) Number of Sample*
:i(AUT13.
A11s FACG
GlilU Cy.ia Av-.ir.-u-o-. .-.- ...... .„.-. . , Ou'.i Ut
Pilling rx.TSiilltPilling •"-— • —Pilling 252 tonne
'" PACEPower loaded
Dpuble Ended ConveyorMounted Trepanner(2 x 45kW motors)External sprays
Dowty 5/150 chocks
4
Machine Ops & proppers
P507
•18
3.4(2)
.1-..8 (2) ,-._3.8(2)
.3.6 (1)
3.1 (7)3,1 (7)1.76*
-
4
General Workers
' E53 •
2.7. (1)
I
1 1
Kcof Seim Mcor Avnr.i,-"- i , - ., -- ,-. . , j- -j- — , - - - j - -1-1 ., , — ,,.,..«T« -T.M Vrnt ' l ' i t r 'n
Seatearth ' . Quantity
Mudstone 1.09m 7.58 m ' s
RETURN STABLE20m of face .at the return end .^forked by a second po-wer loaderBJD Single Ended Ranging DrumShearer (B59) 75kW
Internal sprays ^pick faceflushing)
Dowty 5/150 chocks
5
Stablemen
P508
fa
2.8 C 3)
3.9 ( 3)
5.0 (3)
2.8 ( 2)
3.7 (11)
3.7 (11)2.39*
TAILGATEIn-line mechanised rip
Dosco UTR (37 4'49kW)Panzer (112 kW)
Internal 'sprays (pickface flushing;
Arches 3.67m x 2.74m
7
Rippers Pace Tradesma
P509 P330i..-i n i r i i» ! i i I I B U B I ir i n . IL i. . r _ i _ . . .
9 - 6
4.1 ( 4) 4.7 (1)5.4 ( 3) 2.1 (1)
5.5 ( V) :
3.1 ( 2)
4.6 (12) • 3.4 (2)
4.5.. (14)1.62*
•
•
-. .
- . •.
•
Tcn\o?r(ili;rc: C '-, , , i „ _.. .. ^^, , .,..
Dry 23.4Wet 22.2
1 I\.H. OQ?S
lltMAIUCS
Roof coal 0.27m
Floor dirt 0.2Th
31.2 kg of .explosives usedper day
++ 0
ControlPoint
*~
\Vho!ofccc
t4.9 (3)5-6 (3)
3.-313L>-.6 (2)
4.2(11)
1 .71*
0.36(11
_^ ^ .__ , t m-f »,w 4
1
1j1
3.2+
V/'--,|.l:«co
2.7
Note*:S.
6. .
7,
0.
* " Standard De. ++ Samlped for time at face only.
14.Table 5a TACG SUMMAtVf
"' • " '
Seam
High HazelSito
So.vn N.C.O. Fflco FJCOCoir. Cc.Mllv.k 7, St.-.rtlng .Flnl i l i ln^CcxJc Codo Guton Date Doto- ... - --— •• .—U.,-. .....— — -— -~— — - — •
05:240 802/902 82.8 January 1981
Method of forking
Machine Details .
Dust Suppression
Supports
Sito
occult:™(Filling Shifts)
O.G.S.N.
( K'umbcr of Min In Of cupationM Groupii _ Mctn Rcspinblo
I Dutt1
Concentration
(or Occupation
rng/m*i . .
htQynrtcr
2nd Quvtcr
3rd Qu.irtcr
<lh Quarler
Year 81/82
,| Keon S:implo Concentration
for Sito
i Ash Concentration«
Qojrti Concentration
Site\ • *
Occupation
mo/m*
tnc/'n*
rnfjm0
(Preparation Shifts)O.G.S .v
Numlxrr of l-lc-.ri In Occupation;! Group
Mean Rcspirab.':: Dust Concentration
for Occupation mn/m*
Mean Sample Concentration
for Sito
Ash Concentration
Quartz Concentration
mC/m»
mc/m*
me/m>
LOADERGATEHalf heading system .Pired and power loaded - .
Eimco loader (49kW).Panzer ( l l2kW)»Stage loader (49kW),External sprays on loaderand transfer points.Gel stemming '
Arches 4 .2 7m x 3.05m
1Rippers (L/G)
P515
8
2.6 ( 5)
3.2 ( 3)
2.3 ( 6)2.5 ( 6)
2.6 (20)
2.6 (20)0.84*
Rippers
E515
2.6 ( - 2 )'
.
Typo of Faco • Lcnp.th l-K-ii;ht
Single unitlongwall 250m 1.09madvancing
INTAKE STABLE
Pired and hand filledFloor dint
.
• . JGel stemming
Groetschel bars/ftSJ1 DowtyDobspn hydraulic props
3Stablemen (intake).
P516
6
3.3 ( 6)
3.2 ( 3^3.2 ( 4)
2.6 ( 1)
3.1 (14) '
3.1 (14)1.49*
General Workers
E53
2.9 ( 1)
,. .
Notes;•• Average sampling time 1.02h but 5.36h at Site 8
( ) Number of Samplei
:HAP,T A17 I-'ACG15.
SMfiCV.So AYonfO- Ou ' i 'Ut
Filling |XTi>ii!UPillingPreparation 343 tonne
PACE
Power loaded
Double Ended ConveyorMounted Trepanner(2x45 kW motors)External sprays
Dowty 5/150 chocks
4
Machine Oprs, & Proppers
F517
12•'4.4 (4) j
.'3.7 (2)4.2(1) '
.4.2 (7)
' 4.2 (7)' 0.69*
-
' V
IGeneral Workers
E53 .,
2.2 (1)
1 v
Itoo! Scsm door Avftr.vn.......nr,, ..,,*. , .,.„.,.,..,.,.. WI..T..,. _rr „ ,IL-J in .... . ... '•> » .' w -r rt . IJT- •» — f **-».. Vt' Hi ' !'l t K^H
Qur.n;lt/
^ /Mudstone 1.09m Seatearth 6.20 m /s
RETURN STABLE-
20m of face at the returnend worked by a secondpower loaderBJD Single Ended RangingDrum Shearer(75kW) B59Internal sprays (pickface flushing;
Dowty 5/150 Chocks
5
Stablemen (Return)
F518
4
3.7 (-3)•r. -•
3.1 (2)
4.6 (2)
3.8 (7)
3.8 (7)• 1.08*
TAILGATE
In-line mechanised rip
Dosco UTR (37*49 k¥)Panzer (112 kW)
Internal sprays(pick face flushing)
Arches 4«27m x .3.05m
7
Rippers (T/G)
P519
6
2.3 (1)
5.2(1)
4,5. (4)
• 5.0 (7)
5.0 (.7)
•
:V ":'' • • •
• • . . ' - . •
Tf:ftv»1 r'r~"""c ".jj-,.,-. ^- _, ^t,n •** «M*I>*« "
Dry 23.5Wet 22.4H.H. 91$
UEMAKK.S
Roof coal -0.13m
IFloor dirt -0.13m
68.3 kg ofexplosives usedper day
++ 0
ControlPoint
5. ..I. L3)
3,6 ( 3)
5jL6_(_2)
3.6 ( 3)
4.5 (11)1.95*
0.37 (11
• -..~"-~
Wholo
FiCB
I
t
3.7 -f
)
i\VivM-:.
r.v.o11
2.6
Nolc»:s.
6. .
7. .
0.
* " Standard Deviation. -t-f Sa-ialped for time at face only.
YAI\I f5a
16.TABLE 5b FAC.O SUMMAtXV
Seam
High Hazel
Silo
S«Mrn N.C.O. F.uo ftcaCorr. CoMav.k 7, St-irtlng .Flnlili. 'njCcxJc Co-Jo CtrLori D.Mc Doto
*05:240 802/902 82.8 January 1981
Method of ^forking
Machine Details
Dust Suppression
Supports
Sito
Occupant*(Filling Shifts)
O.G.S.N.
[ K'umbcr of M:-a Iri Occupational Group
i _ Mem Resplnblo
! Dust
Concentration
for Occupation
1 ' ' ' ""
UlQ-jirtcr* . --.2nd Quarter
3rd Quarter
'Jlh QUDI tor
Year 82/83
; Mean S:irnplo Concentrationj for Sitoi Aih Concentrationi
Quartz Concentration
Site
Occupation
mr/m»inc/m*
rnfjm*
(Preparation Slilfts)O.G.S .v
Numlxir of l-'ifcn in Occupy tionil Group
Mean Rcspirsb.'^ Dust Concentration
for Occupnlion rr,n/m»
Mean Sample Concentration
for Sita
Ash Conccnintion
Quartz Conccntr.ition
ron/m*
mg/ni*
mj/rn*
LOADERGATEHalf heading systemFired and power loaded . ' . ' ' .
Eimco loader (49kW)Panzer (l12kW)Stage loader (49kW>External sprays on loaderand transfer points.Gel stemmingArches 4»27m x- 3.05m
" 1Rippers (L/G) Fc. Tradesmen
F515 P330
8 4
2 .3(5) 1.9(1)
2.3 (5) 1.9 (1)
2.2 (6)0.71*
Type.- of Foco Li-np.ll>
Single unitlongwall 250madvancing
INTAKE STABLE
Miirjht— • • • • • • • » ' -
1.09m
Fired and hand filledFloor dint
.
Gel Stemming
Groetschel bars/RSJ DowtyDpbson hydraulic props
3
Stablemen (intake)
F516
6
2o5 (1)
. 2.5(1) . '
. 2 . 5 (1 )
.
• •
" ' . • ' .
Notes;I. Average sampling time 6.71h but 5»l8h at Site 8
3.
( ) Number of Sample*
• - . 17.CHAIlT ' A17s FACE
GMfi Cyc'o AyiT.ij'o— >. . >. . . i . . ,»..»., «.-»... Ou t f ' u tPilling jxriijiiuPillingPreparation 264 "tonne
t=p=^===^^^=n^=^.-===:
Power loaded
Double Ended ConveyorMounted Trepanner(2x45 kW motors)
External sprays '_
Dowty 5/150 chocks
4M/Oprs & Proppers
P517
12
3.8 (1)
... : ,
3.8 (1)
. 3.8 (1)
.
Kcof Sc^.m Hcor Avnr.v-ft•. • ,.. ..».. ,, .. j-.-. — . --,- - - -Tl- -11 - .. - . - _ — • L — . — . r - . Ven t i l a t ion
Qur.rillt/Seatearth ~-* «
Mudstone ! m^/3
RETURN STABLE20m of fane at the returnend worked by , a -secondpower loaderBJD Single Ended RangingDrum Shearer(75k*0 B59Internal sprays ^pick faceface flushing
Dowty 5/150 chocks "
5Stablemen (Return)
P518
4
3.2 (2)
3.2 (2)
3.2 (2)0;14*
"TAILGATE 'In-line mechanised, rip
.Do sco UTR (37x49 kW)Panzer (112 kW)
Internal sprays (pickface flushing)
Arches 4.27m x 3.05m
7Rippers (T/G)
P519
6
4.4 (2). . _ . . , _ . . ., , _ . - . _ ..
• - • - • • • • •
• 4 ^ 4 ( 2 )
4.4 ..(2)0.28*
:
;. ' '
. ' * *"
1
Notes: . '•
Tem:«r,,l.;rft C»^,.^— ..
DryWetll.H.
~~'irSAIU%"™~
•f+ 0i
ControlPoint
" "
1
3.1 (3)0.25>
0.28(3)
.. —
\Vhc!o
r^co
4
3.2 -f
Who!:-
(
5 . . . . . ' . / • •
6. . . . . • . .
7 , - . . - ' • - . . • ' ' /
0. . .
* " Standard Divhtlon . d Mcr.riSamlped for time at face only. r 5b
.18.TABLE 6a TACC SUMMARY
Sewn
High Hazel
Sito
Soorn N.C.O. F.uo f:ca 'Coir. CoMllv.k 7, St.-.nlng Flnlili!n«Ccxlc CoJo Onion Date Dato
•05:240802/902 82.8 Feb. 1982
Method of Working
Machine Detai.ls
Dust Suppressipn
Supports
Sito
Occupation(Filllnc Shifu)
O.G.S.N.
! Number of Mon In Occupational Group
1 Mem Hcsplnblo
: OustConcentration
Cor Occupation
ti
I tt Quarter
LOADERGATEHalf heading system Fired andpower loaded
Eimco loader (49 kW)Panzer (112 kw)Stage loader (49 kW)Sprays on loader and transferpoints - Gel StemmingArches 4.27m x 3.05m
1Rippers (L/G)
F520
15
2nd Quvtcr
2rd Quarter
llh Quarter
Vcar 81/82
Mean S:irnplo Concentration
! for Sito
1 Aih Concentration
{ Qujrti Concentration
roj>»(nc/m»
rn^/m*
Site
Occupation(Preparation Shifts)
O.G.S N.
Numlxrr of l-"i(:n In Occupational Groui>
Mean Rcspirabi': Dust Concentration
for Occupation mp./m*
Hcan Sample Concentration
for Sito
Ash Concentration
• Qttartz Concentration
Notes:
mfj/m*
fng/m*
fn^/rft*
3.9 (D
3.9 d)
3.9 (D
TypcofFaco Ltnp.tli I K i i j r i t«-i_r X . u i- ._^ _ - • _ - ! _ _ - _ ».— '—• »»—^*.»^»M- •••^-•^•.••>.
Single unit /longwall 250m 1.09madvancing
INTAKE STABLEFired and hand filledFloor diflt
•
Gel Stemming
Groetschel bars/RSJHydraulic props
3Stablemen (intake)
F521
9
3.4 (D
3.4 (1)
3.4 (1)~
•
•
. '
.
• •
1. Average sampling time 6.58h but 5«33h at Site 8 • • . •
2.
3.
. • ' ' • . ' ' • . ...
' • • ; . . . . ' • • • • .
( ) Number cf Sample*
:KART 19.A20»s FACE
5Mfi.Cy.Ju Av-fv'o Hoof Sc-im_.. — .. — _ — Ou'"ut - - •-• •- -- - - , — - , - . , . . . - , . . ,Pilling pw $:••!«•Pilling n' ' ' „, , .p.,,. ° 249 tonne Mudstone
PACEPower loaded
•.Double Ended ConveyorMounted Trepanner(2 x 45 kW motors)
External sprays
Gullick (5/150) - •— •Chocks
4Machine Operators &Rippers
P522
18
2.0 (1)
. 2.0 (1)
. 2.0 (1)
, , " ,
RETURN STABLE20m of face at the returnend worked by a second powerloaderBJD Single Ended Ranging DrumShearer (75 k¥J B59
Internal sprays (pickface flushing;Gullick 5/150 Chocks
^,
6Stablemen (Return)
P523
6
3.6 (1)•
3.6 (1)
3.6 (1)
.
.
1 v
Hcor.--,-T... ..-.,.-,. .-,,-1.- .-
Seatearth
Avor.'/cnVcntlhtlon
Qusnllty
"37"10.33 m /s
• TAILGATEPartly in-line and partlyconventional
Panzer - 112 kWIn-line rip by stable machinedinting machine
Arches 4.27m x 7.05m6/240 Gullickunder rip
, . . , 7 , . , .Rippers (T/G)
P524.
•12
Dobson . Chocks
3.2 (2)
3.2 t2 ) '
3.2 (2) ..0.92*
*
— • .
Pace Tradesmen
P330
2.3 (T
•
r(.mr~;,lt,;;~""~c ". . .- .Dry 22.5Wet 21.3
IICMAKKS
Roof coal 0.20m.Floor dirt
0.20m
69.6 kg ofexplosives usedper day
++ Q
Control
Point
JkULU
3.7 (D—T.
0.31 (1
\Vtic!o
P'C~
• "~ ~ — ~ *j
I
3.1 +
i
r,co
i
2.3
Notes:S.
6. .
7.
0.
* " Standard Djvlatlon d Mc:.nSianlped for time at face. only.
YAlM.r.• 6a
20.Table 6b PACC SUMMAIVi
f.<.-.vn N.C.U. F.ico Ffco '$ecvm Coir. Coil llv.k % Sorting Flnlililnj
CcxJc C&Jo Carton D.itc Doto• • " -"in • i I I - * - • ' ' ••' *• — - ' ' " —*- — '••- •"*— —-————-—— - • "• • —
High Hazel 05:240 802/902 82.8 February 19* 2
Silo
Method of Iforking
Machine Details• • • • * ' '
Dust Suppression
Supports
Silo
Qccupatan(Filling Sl.ifu)
O.G.S.N.
i Number of I'lc.-n In Orcup3tion.il Group
1 . Mcz* Kcsplnblo IttQuirtcr
i Dust *nd 0«'-»«"
Conccntrstion r ^U-11 "r .,.
, ~^ , llh Quarter(or Occupation .,.. ,, , . , . . . ,
cflg/m* Year Q2/Q2
j Kcan Sarnplo Concentration
for Sito mr;/m*! Ash Concentration ing/in*
Qujrtt Concentration • cnfjm*
Site
Occupation(Preparation Slilfu)
O.G.S .N.
Numlx;r of l-'iCtn in Occupition:! Group
Mean flcspirabi'c Dust Concentration
(or Occupation mp./m1
Hcan Sample Concentration
for Sito mrjtn*
Ash Conccnir.ition cng/ni*
Quartz Concentration mg/m*
LOADERGATEHalf heading system Fired andpower loaded
Eimco loader (49 k¥)Panzer (112 kW)Stage loader (49 kW)Sprays on loader andtransfer points GelStemmingArches 4.27m x 3.05m
1
Rippers (L'fG)
F520
15
4.4(4)
4.4 (4)
4.4 (4)0.28*
Type; of Faco Lcnp.tli I K i t j f i t
Single unitlongwall 250m 1 09madvancing
INTAKE STABLEFired and hand filledFloor dint
•
Gel Stemming
Groetschel bars/RSJHydraulic props
3
Stablemen (intake)
F521
9
3.3 (3)
3,3 (3)
3.3(3)- 1.40*
i/!
•
. •• . •
I
Notes:I. Average sampling time 6.93h but 5*27 at Site 8
3.
( ) Number of Samples
:HAKT
Slilfi Cy.Iu
Pilling
21-A20«s PACQ
273
Kcc/f Scim
PACEPower loaded
Double Ended ConveyorMounted Trepanner(2 x 45 kW motors)External sprays
Gullick (5/150)Chocks
M/Ops & Proppers
P522
18
4,0 (1)
4.0(1)
4.0 (1)
RETURN STABLE20m of face at the returnend worked by a second powerloaderBJD Single Ended Ranging DrumShearer (75 Wf) B59
Internal sprays (pickface flushing^
Gullick 5/150 Chocks
Stablemen (Return)
P523
4.6 (1)
4.6 (1)
4.6 (1)
Hccr
Seat earth
; "AILGATE
Avor«"ftVcnUhllon
-37;m
Partly in-line and partlyconventional
Panzer 112 kHIn-line rip by stable machine
machine. .
Arches 4.27m x 7.05m6/240 Gullick Dobsori Chocksnnder_xvi.TL__
Rippers (T/G)
• F524
12
4.6 (2)
4.6 (2)
4.6 (2)1.48*
C '
DryWetIUI.
PsCMAKKS
++ 0
Control
Point
4.4 (21.20*
0.31(2)
Wholo
fiCC
4.2
l:i\CO
Note*:5.
6, .
7.
0.
. * " Standard D:vl;. -H- Sa'mlped for time at face only.
VAfil f.r. 6b
22.
The range of concentrations was from 0.6 mg/m at Pitbottom to3.1 mg/m^ for Outbye Tradesmen about a mean of 2.2 mg/m^, whichis in line with the results of previous years.
4.2.3 Surface workers The mean respirable dust concentrationsfor the surface groups are shown in Table 8 and were low - mean0.3 mg/m^, as in previous years.
4.3 Relationship between control point and face mean concentrations
The mean respirable dust concentrations observed at control points(sampled 10m from the face and for working time at face only ) aregiven in Tables 2a - 6b. Table 11 gives the ratio of these to theman-weighted face mean concentrations. The mean value of thisratio for the five faces was 1.23. This is slightly lower thanthe value reported for 1980/81 (1.34) and somewhat lower than thevalue expected for a colliery working low rank coal. (Linby -800/(9JJQ NCB"coal rank code).
4.4 Total dust measurements
Total dust concentrations were measured in conjunction with allrespirable dust samples and are listed by group in Tables 7 and 8.
Table 10 below shows that there was no tendency for total dustconcentration to build up from intake to return along the face likethe respirable dust. In fact, the highest values of the ratio oftotal to respirable dust concentration are observed at the intakeend of the faces.
TABLE 10
Mean Total Dust Concentrationby Pace Position
Total dustcone.
No. ofsamples
RatioTotal/Resp. Dust
IntakeRipSite 1
18.8
62
6.7
IntakeStableSite 3
30.5
60
9.2
FaceSite 4
24.0
60
7.1
ReturnStableSite 5
18.6
44
5.5
Return.Rip-Site 7
20.5
65
4.8
ControlPointSite 8
i
13.4
58
3.2
The level of total dust for elsewhere underground was 12.6 mg/Mcompared to a face value of 23.0 mg/m^ and the mean value of theratio outbye was 6.2, very similar to that for the faces at 6.6.On the surface, total dust concentrations were low at 2.7 mg/m-*while the ratio was higher at 10.3*
23,
4»5 Measurement of nitrous fume
The measurement of nitrous fume levels was re-started in 1981 andvalues are reported for over half the respirable dust samples takenin the period. The main sources of nitrous fume) were explosive andthe diesel locomotives. Typical amounts of explosives used per dayare included on Tables 2a - 6b. Generally, three 100 h.p. locomotiveswere in use hauling men and materials the 5»5 km from the pitbottomtof the faces.
The measurement of nitrogen dioxide (NO ) and nitric oxide (NO) levelswas achieved by fitting the IOM nitrous fume sampling attachment tothe Type 113A gravimetric samplers, the results are shown in Tables7 and 8 by group. In general the levels are similar to those reportedby SINHA & AMIS (1981).
4*5 «1 Nitrogen dioxide (NOp) The mean concentration of this gaswas 0.07 ppm which is low compared to the TLV of 3.0 ppm (HSE, 1981 ).The highest group mean values (0.26 ppm) were observed with diesellocomotive drivers, while the highest shift mean observed was 0.58 ppmfor the material handlers, who were working alongside the locomotives.Occasional shift means above 0.20 ppm were observed on the faces dueto the use of explosives.
4«5«2 Nitric Oxide (NO) The mean concentration of this gas was0.70 ppm; again this is low when compared to a TLV of 25 ppm (HSE,1981). The highest values were reported for the locomotive, drivers(group mean 1.56 ppm - single shift maximum 3.41 ppm) but two shiftssampled on A20's face gave levels of 1.67 and 1.66 ppm due to the useof explosives*
4*6 Environmental summary
Table 11 gives the mean respirable dust concentrations for the faces,development, elsewhere underground and surface for 1981/82 and theprevious two years for comparison, and also the results for the periodApril to July 1982.
The mean coalface respirable dust concentration was 3.2 mg/m for1981/82 and 3.6 mg/m3 for the shorter period. These results arein line with the figures reported for the two previous years. Themean values for the other environments also show little change.
The value of the ratio of the control to face concentrations at 1 .23is slightly lower than in the past year. This value appears somewhatlow for a colliery mining as low a rank coal as Linby.
Although the composition of the routine samples is not available, themean quartz levels as measured by the face control point samples are(at 0.38 rag/m3 of quartz) lower than the corresponding values for1979/80 and 1980/81 at 0.47 mg/m^ and 0.45 mg/m3 respectively.
The total dust mean coalface concentration at 23.0 mg/nH was 6.6 timeshigher than the respirable dust concentration. Elsewhere underground,lower values were observed.
24.
The spread of the observations within the occupational groups, asmeasured by the coefficient of variation, is shown in Tables 7 and8 for all groups. The average coefficient of variation for theunderground groups for respirable dust was 34 per cent compared to49 per cent for the total dust observations. This difference wasnot found by SINHA & ANNIS (1982), when the two values wereapproximately 37 per cent.
The measurements of nitrous fume showed mean levels of 0.07 ppmfor N02 and 0.70 ppm for NO, well below the respective TLVs forthose gases and in line with previous observations. As in thepast the diesel locomotive drivers and associated workers were mosthighly exposed.
5. OTHER INVESTIGATIONS
5»1 Sampler trials
The ORB inhalable dust sampler was used underground at face sites on12 shifts, side-by-side with a Type 113A gravimetric sampler. Alsoa Cascade Impactor was used on 24 shifts to obtain information onthe falling speed spectrum of the respirable dust.
5.2 Radioactivity measurements
Some measurements of the radon and thoron daughter activity levelswere made on airborne dust samples collected in the main return duringperiods of rapid change in the barometric pressure. These measurementsconfirm the findings of CRAWFORD & EDUNf?(l982) that the activitylevel is not noticeably affected by changes in the atmospheric pressure.
25.
REFERENCES
CRAWFORD NP, EDLIN DW. (1982) Radon and thoron daughter workinglevels in British coalmines. Edinburgh: Institute ofOccupational Medicine (lOM Report No. TM/82/13).
HEALTH AND SAFETY EXECUTIVE (1981) Threshold Limit Values 1980.Guidance Note EH 15/80 from the Health and Safety Executive.London, HMSO.
SINHA MM. (1972) Pneumoconiosis Field Research : Environmentalconditions at Linby Colliery 19&9* Edinburgh: Institute ofOccupational Medicine (lOM Report No. TM/72/14).
SINHA MM, ANNIS R. (1981) Pneumoconiosis Field Research :Environmental conditions at Linby Colliery 1979/80. Edinburgh:Institute of Occupational Medicine (lOM Report No. TM/81/13).
SINHA MM, THOMAS P. (19?2) Pneumoconiosis Field Research :Environmental conditions at Linby Colliery 1970. Edinburgh:Institute of Occupational Medicine (lOM Report No. TM/72/24).
TABLE 7
Environmental Data for Faceworkers
GroupDescription
Pace Tradesmen
Rippers Loader gateStablemen IntakeM/C Ops. - ProppersStablemen ReturnRippers Tailgate
Rippers LoadergateStablemen IntakeM/c Ops, ProppersStablemen ReturnRippers Tailgate
Rippers LoadergateStablemen IntakeM/C Ops. ProppersStablemen ReturnRippers Tailgate
Rippers LoadergateStablemen IntakeM/C Ops. ProppersStablemen ReturnRippers Tailgate
Rippers LoadergateStablemen IntakeM/C Ops. ProppersStablemen ReturnRippers Tailgate
Face
All
A8»sA8'sA8»sA8«sA8«s
A l l ' sA11«sA11«sAl l ' sAl l ' s
A2'sA2«sA2»sA2'sA2's
A17'sA17'sA17'sA1?'sA17's
A20«sA20'sA20«sA20'sA20's
OGSN
F330
F500F501F502F503F504
F505F506F507F508F509
F510F511F512F513F514
F515F516F517F518F519
F520F521F522F523F524
Mean Values
Respirable DustMeanCone.mg/nH
2.9
3.94.14.13.45.0
2.22.83.13.74.6
2.73.63.13.03.7
2.53.04.13.64.9
4-33.33.04.13.8
3.6
No. ofObs.
27
411866
7177
1112
1413321419
2715899
54224
293
CoV
45.2
17.242.239.133.818.9
36.441.156.764.639-8
60.336.348.930.532.9
34.647.615.726.744.1
49.034.447.117.233.6
23.1
Total DustMeanCone.mg/m^
14.5
24.130.027.616.219.3
16.831.125.322.121.0
18.230.822.616.220.3
18.129.530.319-525.3
27.032.519.020.022.1
23.0
No. ofObs.
27
411866
7177
1112
1413321419
2715899
54224
293
CoV
30.3
11.237.132.436.428.8
25.654.242.948.032.7
29.932.938.827.553.8
33.124.917.825.134.5
33.423.974.44.6
21.7
32.9
T,'R
5.0
6.27.36.74.53.9
7.611.18.26.04.6
6.58.67.35-45»5
7.29.27.25-45-2
6.39.96.34.85.7
6.6
Nitrous FumeMeanN02ppm
0.07
0.100.080.070.070.07
0.030.050.060.060.04
0.040.050.050.040.05
0.040.050.050.070.08
0.040.060.190.070.07
0.06
No. ofObs.
14
39734
413599
96
188
12
1710557
22113
186
Min.
0.01
0.020.030.040.060.02
0.000.010.020.000.00
0.020.030.000.010.00
0.000.010.020.020.02
0.030.03--0.02
0.00
Max.
0.13
0.200.180.090.080.09
0.060.120.110.110.11
0.060.080.120.080.11
0.130.140.090.100.39
0.060.09--0.11
0.19
MeanNOppm
0.79
0.380.680.591.120.85
0.540.610.720.860.63
0.370.820.901.211.35
0.460.740.831.070.93
1.091.661.670.981.17
0.90
Min.
0.11
0.110.190.140.720.15
0.120.210.610.340.05
0.130.300.030.540.85
0.180.290.060.730.28
0.581.23--0.53
0.03
Max.
2.20
0.691.621.331.521.30
0.921.430.801.331.17
0.901.071.611.562.29
1.051.451.741.401.87
1.592.09-
—1.82
2.29f\>—0
TABLE 8
Environmental Data for Control Points. Elsewhere Underground and Surface
Group
Description
Control Point A8'sControl Point All 'sControl Point A2'sControl Point A17'sControl Point A21's
Respirable Dust
OGSN
84068415842284298432
Mean Values
Development
BricklayersLoco DriversLinesmenMaterial HandlersRepairersSalvageBelt AttendantsOnsettersPace OfficialsOther OfficialsGeneral WorkersOutbye Tradesmen
E58
E19E32E34E38E40E41E44E49E50E51E53E55
Mean Values
Screen OperatorsWeldersOthers - Surface
S4S11SO
Mean Values
MeanCone
/ 7mg/mj
4.44.24.24.24.2
4.2
4.0
2.61.01.81.42.61.82.70.63.62.52.63.1
2.2
0.20.40.3
0.3
No ofObs
141116143
5822
15211331261614167
13321
211
54
18
27
CoV
40.940.531.942.922.4
35.7
69.3
41.063.816.372.541.455.750.846.444.328.355.8
121.6
53.2
64.066.784.2
7.1 .6
Total DustMeanCone/ -\mg/nH
14.013.712.914.09.6
12.8
22.9
12.36.8
13.39.1
13.217.717.24.9
14.113.614.914.7
12.6
3.51.92.6
•2,7
No ofObs
141116143
58
21
15211331261614167
13327
211
54
18
27
CoV
28.5202.723.433.015.0
60.9
43.9
33.439.045.6
207.432.476.135.7
107.732.134.655-425.0
60.4
28.242.699.4
56.7
T/R
3.23.33.13.32.3
3.0
5.6
4.76.87.46.55.19-86.48.23.95.45.84.7
6.2
7.54.88.6
10:3
Nitrous FumeMeanNooppm
0.060.040.040.050.07
0.05
0.06
0.060.260.070.130.060.080.040.060.040.050.05 /
0.06
0.08
0.100.100.09
0.1p
No ofObs
66991
31
15
13166
1815119
1248
195
136
228
12
Min
0.020.000.020.00-
0.00
0.01
0.010.080.020.020.000.000.010.000.010.010.010.02
0.00
0.060.070.03
0.03
Max
0.100.070.080.14-
0.140.12
0.100.490.190.580.200.200.081.180.060.080.080.09
1.18
0.150.140.17
0.17
MeanNo
ppm
1.080.840.801.200.96.
1.00
0.51
0.521.560.580.960.480.720.330.631.000.410.510.51
0.68
0.140.120.14
0»'43
Min
0.180.180.100.43-
0.10
0.13
0.180.390.170.220.140.180.220.160.480.170.070.22
0.07
0.100.060.05
0.05
Max
2.411.471.991.78-
2.41
1.23
1.323.410.982.290.821.690.491.362.300.781.101.15
3.41
0.190.190.23
0%19
CO
to
TABLE 11
Summary of Dust Concentrations by ,
Pace and General Environment, 1981/82
Class of Environment
Mechanical Pilling
Preparation
MEAN COALFACE
Deve lopment
Elsewhere Underground
| Surface
Seam
HighHazel
Pace
A2'sA8»sA11«sA17'sA20»s
Seam Mean
Mean Resp. DustConcentrations mg/m3
1979/80
4.64.4.
4-5
1.9
4.1.
3.0
1.9
0.3
1980/81
3.73.43.74.0
3.6
2.1
3.5
3. a1.6
0.3
1981/82
3.1 (84)3.8 (45)3.2 (56)3.7 (55)3.1 ( 6)
3.4
2.2 (14)
3 •?
3.1. (26)
1-9.051)
0.3 (20).
1982*
3.0 (15)3.9 ( 7.)
3.2 (12)4.2 (11)
3.6
-
3.6
3.9 (11)
2.4 (33)
,0.3 ( 7)
Control to PaceRatio
1981/82
1.321.051.311.221.19
1.21
1 982*
1.431.51
0.971.05
1.24
* April - July 1982 only ( ) no of observations
to
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(A20115) IOM (R) ReportCov art 3/15/06 12:32 PM Page 2
