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17.11.2004 1
RESERVES PRESENTATION FOR VELENJE COLIERY ACCORDING TO
UNITED NATIONS FRAMEWORK CLASSIFICATION
Igor Veber, bsc. geol. eng.Dr. Evgen Dervarič, bsc. min. eng.
Premogovnik VelenjeVelenje Coliery
Presentation to First Session of UNECE Ad Hoc Group of Experts on Supply of Fossil Fuels
Geneva - 10-11 November 2004
17.11.2004 2
RESERVES PRESENTATION FOR VELENJE COLIERY ACCORDING TO
UNITED NATIONS FRAMEWORK CLASSIFICATION
INTRODUCTION
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RESERVES AND RESOURCES
WHAT ARE WE, CONSIDERING RESERVES AND RESOURCES, INTERESTED IN?WHERE THEY ARE ? (SLOVENIJA)
IS IT POSSIBLE TO GET THEM ? (ACTIVE UNDERGROUND COLIERY – A.P. 4Mt)
IS THERE A LOT OF THEM ? YES
CAN WE GET SOME MONEY OUT OF THEM ? WELL, WE MAKE A LIVING
SEARCHING
FOR...
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geography
Just in case
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Geography & underground coal seam contour
A NICE VALLEY CONTAMINATED WITH INDUSTRIAL ARCHITECTUREAND THREE SUBSIDENCE LAKES IN PAST DECADES
UNDERGROUND COAL SEAM CONTOUR
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RESERVES PRESENTATION FOR VELENJE COLIERY ACCORDING TO
UNITED NATIONS FRAMEWORK CLASSIFICATION
GEOLOGY
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Geology & underground coal seam contour
8 km
Tectonic depression is filled up with pliocene and quaternary sediments
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underground coal seam contour
Tectonic depression is filled up with pliocene and quaternary sediments
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HOW DEEP is the coal seam
A
B
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COAL SEAM THICKNESS
A
B
SW
NE
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Longitudinal section and aquifers
38/
56
PT-
6/63
36/
55
46/
59
P-6
l/64
P-8
r/86
P-8
tt/90
PO -
9p/8
0
PM
-8/9
6
TRIASNI DOLOMIT
A B
TRIASSIC DOLOMITE
PLIOCENE
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Cross - section
DOLOMITE - TRIASSICSILT - PLIOCENE
MUDSTONE - PLIOCENE
TUFF - OLIGOCENE
SAND - PLIOCENE
SANDY CLAY - QUATERNARY
SUBSIDENCE LAKE
COAL - PLIOCENE
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RESERVES PRESENTATION FOR VELENJE COLIERY ACCORDING TO
UNITED NATIONS FRAMEWORK CLASSIFICATION
FACTS
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VELENJE COLLIERY
average thickness of the lignite seam is 60 m
underground extraction
average depth of the seam is 300 m
very thick coal (lignite) seam
maximal thickness reaches 168 m
mining method: specially adapted and highly productive.
maximal depth of the roof strata border is 480 m
tectonic depression - PULL APART BASIN
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VELENJE COLLIERY
PRODUCTION: 4 Mt/year
UNTIL NOW: round 200 Mt
FROM NOW: AT LEAST 100 Mt until 2025
80 km OF ACTIVE BASIC ROADWAYS
15 km per year
60 t/manshift
40 t/m/day
…
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BEHIND FIRST LINES
DATABASEround 2600 boreholes70.000 general borehole data130.000 stratum data200.000 chemical data100.000 technical data more than half a milion informations a MUST: good software support
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STRUCTURAL BOREHOLES, PIEZOMETERS, DEWATERING WELLS, GEOMECHANICAL MEASUREMENTSMore than 600 BOREHOLES MADE FROM SURFACE (>200 km)ROUND 2000 BOREHOLES MADE UNDERGROUND (FOREBORINGEXTRA)FIRST 1873, DEEPEST 1603m, “THE BEST” 168m OF COAL
17.11.2004 18
COAL Petrography
DETRITIC COAL
XILITIC COAL
CARBOMINERITIC
GELITIC COAL
FUZITIC COAL (1%)
“YOUNG” (2.5 – 3 MILION
YEARS OLD), SOFT,
BROWN COAL – LIGNITE
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AVERAGE VALUES OF CHEMICAL PARAMETERS AND CALORIFIC VALUE OF THE COAL
PARAMETER NUMBER OF SAMPLES AVERAGE VALUE%
MOISTURE 1722 30,00063 30
ASH 1722 22,22239 22
VOLATILE 1610 27,62893 28
C_FIX 894 20,45509 20
COKE 1612 42,60458 43
1644 1,741496 1,7
CALORIFIC VALUE 1640 10,87699MJ/kg
10,9MJ/kg
SULPHUR
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RESERVES PRESENTATION FOR VELENJE COLIERY ACCORDING TO
UNITED NATIONS FRAMEWORK CLASSIFICATION
RESOURCES & RESERVES
17.11.2004 21
RESOURCES & RESERVES calculation
- WE HAVE TO EXPLORE DUE TO REGULATION
- WE HAVE TO CALCULATE THE RESERVES AND RESORCES AND PREPARE WRITTEN REPORTS DUE TO LEGISLATION
- WE HAVE TO PREPARE THE REPORTS IN ACCORDANCE WITH REGULATION
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RESOURCES & RESERVES calculation
Constraints: - regulation,- geology,- technique,- excavation borders,- safety pillars,- cut-off values,- calculation methods,- software,- some more,- many more,- …
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RESOURCES & RESERVES calculation
- DATABASE IS A SOURCE OF DATA FILES READY FOR FURTHER TREATMENT
- RESULTS: DIGITAL MODELS – GRIDS (WITH POSSIBILITIES OF MATHEMATICAL CALCULATIONS AND GRAPHICAL PRESENTATIONS) – CONTOURS, 3D …
- CAD SOFTWARE READS INTERPRETED PART OF DATABASE DIRECTLY
- RESULTS: SECTIONS – PROFILES, SUPERFICIES …
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RESOURCES & RESERVES calculation
SEAM BOTTOM CONTOURS
17.11.2004 25
RESOURCES & RESERVES calculation
SEAM UPPER CONTOURS
17.11.2004 26
RESOURCES & RESERVES calculation
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SECTIONS
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RESOURCES & RESERVES calculation
SECTION
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RESOURCES & RESERVES calculation
SECTION
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RESOURCES & RESERVES calculation
SECTION
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RESOURCES & RESERVES calculation
- MOST IMPORTANT IS TO USE RELIABLE, ACCURATE AND UP-TO-DATE DATASETS
- WHETHER WE CALCULATE THE VOLUMES EITHER WAY, THE RESULTS ARE ALWAYS VERY CLOSE
- USING TWO METHODS IS APPROPRIATE FOR VERIFICATION
17.11.2004 31
RESOURCES & RESERVES presentation
17.11.2004 32
LOOKING FOR A PLACE UNDER THE SUN
AND AS SUCH WE HAVE TO TAKE CARE OF OUR OWN ACCORD BY OURSELVESWE HAVE TO ADAPT BECAUSE NOBODY WILL ADAPT TO US
A SMALL PART OF THE WORLD
WE ARE
17.11.2004 33
UNFC
17.11.2004 34
UNFC presentation
RESOURCE TYPE CODE AMOUNT COMMENT
TOTALRESOURCES
RESERVES
111 222 222 222 t exploitable
131 122 222 222 t mining losses
REMAININGRESOURCES
311 88 888 888 t safety pillars
331 155 555 555 t high ash coal
17.11.2004 35
UNFC
Presentation according to UNFC has to differ from the national scheme because of different classification origin but the figures remain the same.
Anyhow, this transfer from national classification into UNFC is only an attempt and serves as anexample for discussion.
17.11.2004 36
UNFC presentation
17.11.2004 37
questions
WHAT WE DON’T KNOW:IS MINING REPORT A KIND OF CONGLOMERATE
CONSISTING OF EXISTENT DOCUMENTATION OR A STUDY? (BY DEFINITION – BOTH ?!?)
WHO EVALUATES THE MINING REPORT?
WHICH ARE THE PARAMETERS FOR ECONOMIC RANGING?
RENEWAL FREQUENCY? BY DATE, OR, IF NECESSARY? (because it takes some time to complete a study)
PARAMETERS FOR GEOLOGICAL AXIS – UNFC DEFINITION: DETAILED EXPLORATION: …SUCH THAT ... ARE ESTABLISHED WITH HIGH DEGREE OF ACCURACY … - IN SUCH WAY (WITHOUT EXACT FIGURES) MUCH CAN REMAIN FOR DISCUSSION (OR FOR WRONG INTERPRETATION)
17.11.2004 38
Remark
In the last instance it is on the competent person, todecide whether to accept the range of geological exploration as satisfying or not and whether to agree with calculation methodology or choose a new, moreappropriate one.
17.11.2004 39
SOME DILEMMAS
•CODE 131 IS NOT DEFINED (foreseen) YET IN UNFC, BUT MINING LOSSES ARE AROUND SOMEWHERE THERE!•IF WE CHOOSE DEFINED CODE 331 THE COAL AT ONE LONGWALL FACE SHOULD BE DEFINED PARTLY AS ECONOMIC AND PARTLY NOT (not logical)•A KIND OF ANALOGY: CODE 311, SHOULD BE USED FOR THE COAL IN SAFETY PILLARS•THE DEFINED CODE 331 IS NOT SUITABLE FOR THIS COAL WHILE THE COAL IS ONLY TOO EXPENSIVE (WE KNOW HOW AND WE CAN GET IT OUT).
17.11.2004 40
RÉSUMÉ
For the time being we shall calculate the reserves in an expert way as up to present!
And wait for further development of European (and local?) regulation!??!
The only additional action at the end of the calculation report should be a transfer (should be a kind of easy link) into UNFC tables and codes (for an expert a piece of cake) if necessary.
17.11.2004 41
RÉSUMÉ
But, of course, having in mind that behind the simple codes, all the homework has been done.
FEASIBILITY STUDY
MINING REPORT
ENVIRONMENTAL REPORT
GEOLOGICAL RESEARCH
17.11.2004 42
FINAL REMARK
IF UNFC RESULTED AS A FRAMEWORK FOR DIFFERENT NATIONAL CLASSIFICATIONS,
MAYBE THE SAME (OR SLIGHTLY ADAPTED)
UNFC CAN PLAY ALSO A ROLE OF A FRAMEWORK FOR MANY
INTERNATIONAL CLASSIFICATIONS, THAT ARE
MOMENTARILY TOPICAL AROUND THE WORLD
17.11.2004 43
THANK YOU !HAVE A NICE DAY !
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