case study - minesched at sebuku

8/17/2019 Case Study - MineSched at Sebuku

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Case Study Application of MineSched at Sebuku

April 2007


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Straits Asia Resources:

Part of the Straits group of companies.

Recently listed on Singapore Stock Exchange

Operates Sebuku oal Mine in South !alimantan

Objectives of this Presentation:

". #escribe the geology$ conditions and mining methods at

Sebuku%. #iscuss the implementation of MineSched and ho& it is

used in planning and Scheduling at Sebuku

Introduction


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Location and History

O' a&arded "(()

oal mining commenced #ecember "((* +irst Shipment ,anuary "((-

Mining ontractor ukit Makmur Mandiri

/tama 0/MA1

Plant ontractor 2eightons ontracting

3ndonesia 0231


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45km from north to south$"6km at &idest point.

7opography:

8series of hills to east.

8fresh&ater s&amps to &est.

'estern coast is bordered by

mangro9e forests.

/p to %66$ most coal mined

from the relati9ely shallo& pits

to the south. Remaining kno&n reser9es are

in and to the &est of the 7anah

Putih pit.

Pulau Sebuku


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Production

Coal Production

Resources and Reserves

3ncreasing production$

resources and reser9es.

Resource con9ertible upon

land use redesignation.

Hi! volatile bitu"inous coal# As!$ %#&' Sulp!ur$ 0#7' Calori(ic )alue$ *+&00 ,ad- .otal /oisture$ 1'


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eoloy 3 Cross Section


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eoloy 7anah Putih pit is located in

fresh&ater s&amp:

2o&er than high tide le9el58%6m o9erlying mud

Significant ;E8S' oriented

normal fault system &ith

displacement up to 46m.

#ip 5 to "6 degrees to &est

Strata consists of &eak

mudstone and shale &ith

interbedded coal seams.

4ault

Pit Li"it


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# /inin /et!od 3 5und

Peri"eter 5und

/anrove S6a"p


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2# /inin /et!od 3 /ud

/ud Cell

/ud 4ace

5und


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/inin /et!od 8aste

/ud /inin$ 9ier positioned on

!ard (loor and pulls "ud do6n#

:;uip"ent

PC210 e H9?*1 trucks 0


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?# /inin /et!od Coal

8as!

5ypass 3 Hi! As!

5ypass 3 Lo6 As!

:;uip"ent

PC?00 e


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/inin /et!od Pit 9e6aterin

Su"p and Pu"ps

Settlin Pond and Li"in


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/ine Plannin

Constraints that determine mining and dumping strategy:

". 'estern limit is not an economic limit 0land use designation1

%. 2ikelihood of future extensions to &estern permits

4. 'orking Space in Pit and expanding production

). Management of Pit 'ater

5. Expose multiple seams for blending


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/ine Plannin Stratey

Pit di9ided into Strips 0*6m1and locks 0up to )66m1

Open up pit along the strike

7erraced mine faced exposing

different seams.

Main access road and ramps topit floor.

Mud and upper interburden

dumped to out of pit dumps.

#ump o9erburden in8pit bet&een

ramps as the pit progresses. Ad9ance face at lo&est area

during dry season and install

pumping infrastructure.


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O5 9u"p

Lo 6er Sea" In ter b

urden

/ud Cell

/ud

@pper Sea"

Strip Strip BStrip

*6m

/ine Plannin Stratey

.oe o( du"p o((set (ro" "ine (ace

to assist 6ater "anae"ent#

/ud cells constructed 6ell back (ro""ine (ace to "ini"ise risk o( (ailure#


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Processin and S!ippin

Coal /inin

RO/ S>P

5P Crus!er 8as! Plant

Port S>P

5are Loader

=56> =56>


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Surpac )ision used for geological modeling?$

sur9eying and mine planning.

ompany standard @ used at all Straits sites.

Ease of use.

onsistency bet&een sites.

Adapted for use in a stratigraphic deposit.

/ine Plannin and eoloy


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eoloical /odel


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/ine Plannin and Sc!edulin

C!allenes at Sebuku$

Pit getting deeper &ith production expansion.2imited room in pit.

2arge number of &aste and coal fleets.

#iscipline in Mining Practice


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# Pit 9esin

2# enerate Reserves

Sc!edule 8aste /inin

?# Sc!edule Coal /inin

1# Coal 8as! and Production

*# Ra"p and 9u"p 9esin

7# /aterial 5alance

=# Co""unicate Plan

Process 3 5e(ore /ineSc!ed

Surpac

Spreads!eet

Spreads!eet

Spreads!eet

Spreads!eet

Surpac

Spreads!eet

[email protected]

Seam #7Ms$ mining limits.

RO/ para"eters+

dilution+ recovery etc#

'aste mining euipment

and producti9ities.

oal mining euipment

and producti9ities.

'ash plant capacity$ yield.

7opography$ dump slopes$design gradients and &idths.

S&ell$ haulage profiles.


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Process 3 5e(ore /ineSc!ed

9isadvantaes of Spreadsheet System: ;o graphical 9alidation of results. Braphical representation of results time consuming and

tedious to generate. ;o automatic spatial precedence. ;o 4rd party support.

Advantaes of Spreadsheet System:

+lexibility

Ease of /se Easy integration &ith do&nstream systems


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Process 3 8it! /ineSc!ed

# Pit 9esin

2# enerate Reserves

Sc!edule 8aste /inin

?# Sc!edule Coal /inin

1# Coal 8as! and Production

*# Ra"p and 9u"p 9esin

7# /aterial 5alance

=# Co""unicate Plan

Surpac

Spreads!eet

Spreads!eet

Surpac

Spreads!eet

st stae /ineSc!ed i"ple"entation#


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Sc!edulin Inputs

# Pit 9esin 0Mining 2ocations1

2# 5lock /odel 0ROM model1 8aste :;uip"ent

?# /inin Se;uence


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Sc!edulin Outputs

". Reports: 8 oal Exposed Schedule 0Cualities18 'aste Mining Reports

%. Bantt hart

4. Animations

). EOP Surfaces


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Sc!edulin Outputs


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Sc!edulin Outputs


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4uture Opportunities

# Pit 9esin

2# Sc!edule 8aste /inin

Sc!edule Coal /inin

?# Coal 8as! and Production

1# Ra"p and 9u"p 9esin

*# /aterial 5alance

7# Co""unicate Plan

Surpac

/ineSc!ed

/ineSc!ed

Surpac

/ineSc!ed

/ineSc!ed 0ROM Model1

# Coal /inin+ 6as!in

and stockpiles#

2# /aterial 5alance

case study - minesched at sebuku

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