SOMP 08 Industry Kogler

7/29/2019 SOMP 08 Industry Kogler

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BOX HOLE BORER

MD320


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Sandvik Mining and Construct ion

The Need: Safe Connection between Mine Levels

z Different needs to connect levels

9 ventilation9 travel ways

9 ore passes

9 other supply/connection holes

z Rescue access in case of emergency

9 horizontal (with special muckingsystem) and any inclination


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The Conventional Methods

z Conventional method: Drill & Blast

9 Top level is not developed

hand held overhead drill from scaffoldings

Drop raising (top down)

long hole drilling bottom up

blast in one go

high risk to loose the hole

ALIMAK Climber


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The Mechanical Method: Raise Borer

z Mechanical cutting

9 Raise Boring bottom up

Blind boring (limited diameterand length)

9 Raise Boring - reaming

Pilot hole and reaming

Special pavement for the rigneeded

Top section developed

before


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Our Motivation for the Development

zCont r ibu t ion t o safe t y9 high percentage of fatalit ies happens at the raising operation -

therefore

9 get t he people out o f dangerous areasz Speed up t he Developm ent

9 box hole boring independent from the reef (upper level)

development

9 high advance rates e.g. time for a hole of 15 m:

conventional about3 weeks with MD320 about 3 days (including mobilisation and de-mobilisation)


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The advanced solutionBox Hole BorerMD320


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z High speed of advance

z Remote Control no workers in hazardous working areasz No special pavement needed

z No development on top level needed

z Technical Data

9 Component Weight, max. 12 t, easy to re-locate

9 Total installed 280 kW

9 Cutter motor 180 kW

9 Available diameter (current) 1.6 m

9 Inclination of hole 0 90 deg

9 Hole length, max 100 m

9 Cutter Discs raise-borer tools

Box Hole BorerMD320


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Box Hole Borer Sequence of action

z Tramming & Start-up - Step 1


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z Erecting

Step 2 Step 3



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z Collaring & Start BoringStep 8 Step 9



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Working Principle


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BOXHOLE BORING SYSTEMMine installation

Power supply

Main power supply 1000V 50HzTransformer capacity 1000 kVA

Water supply

Cooling water temperature 10 - 25 CWater flow app. 80l/minWater pressure 6 10barFiltration less than 500 micronpH value 7 8Feed line size 2

Return line size 2


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Face to start


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MD320 - track bound


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MD320 - track bound


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MD320 - track bound


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MD320 - trackless


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MD320 - trackless


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MD320 - tracklesssupply car


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Box Hole Borer in Action


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Control Display


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Collaring


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Box Hole Borer in Action


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The hole is finished


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Waiting for the next hole


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Achievements

Box Hole DevelopmentNewman Shaft - Lonmin/RSA

0

2

4

6

8

10

12

14

16

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Hole Number

HoleLength[m]

0

0,2

0,4

0,6

0,8

1

1,2

1,4

1,6

1,8

CuttingRate

incl.Collaring[m/h]

Hole Length [m]

Cutting Rate [m/h]

no

data

recorded


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AchievementsNet Cutting time per Hole

0

2

4

6

8

10

12

14

16

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Hole number

Length

ofthehole[m]

0,00

2,00

4,00

6,00

8,00

10,00

12,00

14,00

Nettim

edemand[h]

Hole Length [m]

Net cutting time [h]


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Indicative Time for one Hole

0 5 10 15 20 25 30 35 40 45

Time demand

Transport to workplace

Power con ection 1000 VWater connection

Separate powerpack

Launchtub e off rail

Turn launchtub e

Lift up launchtube

Line up MD320

Spread launchtub e

Install Haulage System

Mobilisation

collaring

tot. drilling

tot regrip

Drilling

Regripp MD320 back

Unspread Launchtube

Retract launchtub e

On rail launchtube

De-install Haulage

Disconnect power supply

Transport out

Demobilisation

Total Time one Hole

Working

Steps

Average net t ime fo r one Box Hole

example - indikative

Basis:

Hole length [m]

Advanc e Rate [m/h]

30

1,70


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Indicative performance figures

z Conventional

9 advance/day 1 2 m/d (usual one round = 1,2 m)

9 cost per meter 400,- Euro/m (2002 ! today double ?)

z Mechanical raise boring

9 preparation time app. 5 d

9 advance per hour app. 1 m

9cost per meter 853,- Euro/m

z Mechanical box hole boring

9 preparation time app. 1 shift

9 advance per hour app. 1,5 m

9 cost per meter 685,- Euro/m


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Rock Properties - Portugal

Rock Properties

050

100150

200250

300350

Graywake

P

olysulfidic

ore

P

olysulfidic

ore

Pegmatite

high

quarcitic

Shist

Rock Type

U

CS(MPa)

0

1

2

3

4

56

Ce

rchar(CAI)

MPa

CAI


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Rock properties Portugal

/ 068

( 5

230,14 438,56 MPa 313,48 ( 5

15,65 26,20 MPa 19,47

( 5

35524 52736 MPa 44241

Uniaxial compressive strength

Average:

Average:

Results of Rock Test: Page 2

Date:Hebenstreit

c

Young's modulus

Report issued by:

Max.:

Max.:Min.:

Min.:

Brazilian tensile strength

Min.:

MPa

Estat

2007-11-09

specimen(s) H/D = 1)

MECHANICAL PROPERTIES AND ABRASIVITY03

MPa Average:

Sample No.:Test Report No.: 2007

MPaspecimen(s) H/D = 0.5)

MPa

MPa

t

specimen(s) H/D = 1)

Max.:

MPa


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MD320 - trackless - Portugal


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MD320 - trackless - Portugal


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The first hole in Portugal


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Questions ?Thank you for listening !

Documents

SOMP 08 Industry Kogler