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GREEN MINE INFRASTRUCTURE PLAN; FUNDAMENTALLY SCENARIO DESIGN
TO DETERMINE MINE BLOCK OPTIMIZATION AND MINERAL SECURITY
(Case Study : PT Vale Indonesia Pit Compartment 02
Blok 1a5a1517 Bahodopi, Middle of Sulawesi)
Rahmat Muallim
*)Mine engineering, Hasanuddin University
*) Persatuan Insinyur Indonesia
*)Makassar, Indonesia
ABSTRACT : Land disputes and opening area of mines are number of international issues in modern business
nowadays. The increasing of export mineral reserve to another consumer country made it will not be controlled to
exploit this resource to fulfill their industrial be fit and develop. Government, investor, and society should be have
same purpose to bring this mineral to touch all of stakeholders. Uncertainly law among them made mineral industry
be an enemy to break environment and did not give an advantage to society because bad government decision to give
permitted for opening mine area. PT Vale Indonesia Bahodopi Middle of Sulawesi especially in Pit compartment 02
Blok 1a5a1517 is a far boundary to plan material movement. The located was closing with number of IUP (mine
Legality permitted) area gave a pressure to this company to integration a plan who can be united among legal
certainly concept and good mining practice by environment-friendly mining thinking so that born a trust and
responsibility to secure this mineral from company and government will be believed it . Green Mine infrastructure
Plan have number of methods namely identify location of block model, evaluation of block model reserved by
compartment block method, Pit shell optimization, green sustainability concept that consist of three parts namely
existing scenario plan designed, new scenario plan designed and Mine out plan designed. Every designed in this
researched used software Vulcan 7.5 to give a simulation this plan. Therefore, resulted from this researched namely
we got mine green infrastructure sustainability concept and it project concession will be saved and opened.
Keywords : Good mining practise, Green mine infrastructure plan, Vulcan 7.5, sustainability, and scenario.
1. PREFACE
PT Vale Indonesia Bahodopi middle of Sulawesi in
generally has two challenges namely internal challenges
and external challenges. Internal challenges explained
PT Vale Indonesia have not a best plan to convince
company to develop mine in projected area because the
located of block 1a5a1517 too far so mine engineer
doubt to opening this area and uncertainly law from
government to control mineral project in Bahodopi area.
The prove are 333 IUP has risen in Bahodopi area
emphasized PT Vale Indonesia concession area will be
smaller and beside that, nickel supplier in china in last
2009 years is 600.000 wmt will be achieved 10.500.000
wmt in 2013. These case make PT Vale Indonesia has
not be brave to take a risk develop this area. External
challenges explained that UU Minerba No 4 Th 2004
emphasized two thinks namely add values of mineral
within smelter building has more strongest rule by
Kepmen ESDM no 7 about smelter building for IUP in
2014, PP No 23 Th 2010 about smaller concession rule
by limitation area for exploiting namely 2500 Ha, and
UU No 32 Th 2004 about otoda has been
changed government paradigm to be a king in
every single area who have mineral resources.
This challenges have implicated to any mineral
business must keep their related to every stakeholders
so that every actvitiviy will be justice in all of mine
society and pressured to PT Vale Indonesia to think
more to solve its mine.
Opening area pit compartment 02 Block 1a5a1517
Bahodopi middle of Sulawesi needed good strategy of
plan because mine opening has implicated to
environment. Beside that, the located of Block
1a5a1517 to Soroako smelter area soo far namely 65
Km and 55 Km to Set up petea. Enivironment and far of
block gave a sense to think a solution how we can make
a good mining sustainability strategy who will be united
among environment decision and policy of company
decision by conducted of mine opening area by number
of strategy namely design infrastructure, distanced
location of infrastructure, capacity of each
infrastructure, and scenario material of infrastructure.
These case, will be resulted green infrastructure plan
that emphasized to green suistainablity. This concept,
try to make a scenario of mine plan who was focusing
green mine infrastructure plan in Bahodopi PT Vale
Indonesia.
2
Green Mine infrastructure Plan will be implemented to
far of mine block in any location
in ASEAN because reminded that all of ASEAN
country especially Indonesia is a prosperous country
and needed mineral resourced to develop their country.
This project has described schema of material
movement scenario to fulfill good scheduling to run this
project systematically within number of scenario
namely existing plan scenario, new plan scenario, and
mine out scenario. The number of scenario will be
explained the resulted of green mine infrastructure plan
so that we will be knew pit compartment 02 Block
1a5a1517 Bahodopi middle of Sulawesi in the end of
mine scenario. .
2. METODOLOGY
Project methods in Pit compartment 02 Block 1a5a1517
bahodopi middle of Sulawesi namely take the scenario
plan data who consist of historical data location of block
1a5a1517, topography data, block model data, boundary
ore Bahodopi data, main haul road data, and
geometrical bahodopi design data. After all of data
fulfilled, continue with data analyzed by decided map
distance among pit compartment 0 2 to soroako
bahodopi and Set up Petea, evaluation of pit
compartment 02 Block 1a5a1517 reserved by
compartment pit methods, Pit shell optimization
methods, green mine scheduling scenario who consist of
three schemes namely existing scenario plan, new
scenario plan, and Mine out scenario plan. The number
of this methods will be explained green sustainability to
this project will be running well in mine opening area.
3. REPORTING RESEARCHED
3.1. Concession Bahodopi Area
Concession area is PT Vale Indonesia mining authority
who will be explored and exploited. In generally,
concession area PT Vale Indonesia will be showed in
figure 3.1 namely:
Figure 3.1 Soroako smelter distanced to compartment 02
Besed on figure above distanced among soroako smelter
to compartment 02 namely 65 Km. this case showed
that to conduct material movement from compartment
02 to Soroako smelter is too long road. Specified of
location set up Petea to compaertment 02 namely 55
Km who showed in figure 3.2 by Vulcan 7.5 namely:
Figure 3.2 distanced Set up Petea to Block 1a5a1517
In figure 3.2 above explained that distanced to move
material pit compartment 02 Blok 1a5a1517 too far and
we need scenario to make this scenario more simple
smaller plan so that made a simplify scenario to
describe sustainability of green mine infrastructure.
3.2. Green mine Infrastructure Plan design
Pit compartment 02 Block 1a5a1517 Bahodopi
middle of Sulawesi designed by Green mine
infrastructure plan consist of three methods
namely evaluation of mineral reserve pit
compartment 02 block 1a5a1517, Pit shell
methods, and scheduling of schemes pit
compartment 02 such as existing plan scenario,
new plan scenario, and mine out plan scenario.
Those case, will be explained accordance to their
steps namely:
1. Evaluation of mineral reserve block
1a5a1517 Bahodopi middle of Sulawesi
Block model 1a5a1517 divided in three
boundary of evaluation namely
compartment. Every compartment in block
1a5a1517 can be showed in figure 3.3
namely:
Figure 3.3 Block model compartment 1a5a1517
Soroako smelter
Block
1a5a1517
area set up petea
Blok 1a5a1517
Comp 02
3
Based on figure 3.3 compartments of block model
1a5a1517 have reserved 9.579.750 with cut of
grade 1.7% Ni. This research has been focused to
Pit compartment 02 withinmaterial reserved who
showed in table 3.1 namely:
Table 3.1 Reserved of pit compartment 02
2. Pit shell optimization method
Pit block 1a5a1517 who has been planed by use pit
compartment method and schemes of existing road
showed that pit compartment 02 as a first
compartment will be opened in block 1a5a1517.
We will show in figure 3.4 namely :
Figure 3.4 schemes of scheduling comp. 02
Figure 3.4 has explained that comp 02 is the first
scheduling target by used Vulcan 7.5. Pit shell
compartment 02 namely pit optimization who
formed by outside design of Pit namely manual pit
and boundary of inside design of pit namely pit
shell it self. This case showed in figure 3.5:
Figure 3.5 schemes of pit shell comp 02
Based on this design we will be gotten pit level
every bench from level 820 up – 775 ultimate pit
limit. It will be showed in figure 3.6 namely:
Figure 3.6 mine push back pit comp 02
3. Scheduling of pit compartment 02 block 1a5a1517.
The importance thinks from this case namely there
are 3 schemes of scheduling such as existing plan
scenario, New plan scenario, and Mine out
scenario. Those of are will be explained namely :
1) Existing plan scenario
In this step, plan work based historical data
bahodopi for knowing effective distance to get
a maximize distance scenario. This planed will
be showed in figure 3.7 namely:
Figure 3.7 existing plan Bahodopi
Based on figure 3.7 scenario of material
movement, value of distance namely face to
existing Rompile 12.41 Km, Face to existing
disposal 12.95 Km, and face to LGOpile
14.028 Km.
2) New plan scenario
New plan scenario is way to solve long
distanced area from existing plan so that be
happened new map distance and new dumping
infrastructure design to get maximize concept
in mine planning. This scenario, will be
showed in figure 3.8 namely:
Material Bah_1a5a1517 Comp_02 Unit
ob_vol 105470 Wmt
waste_vol 0.00 Wmt
ore_vol 59851 Wmt
lgo1_vol 16455 Wmt
lgo2_vol 18629 Wmt
lgo3_vol 0.00 Wmt
Total Material Move (- Civil) 200,405.00 Wmt
SR (OB/(Ore+LGO)) 1.11 Wmt
summary of Reserve Pit Comp_02
Comp 02
4
Figure 3.8 New plan scenario
Based on this data explained two thinks
namely firstly, effective distance from existing
plan. It case will be showed in table 3.2
namely:
Table 3.2 Distance comparison scenario
Table above has explained that new plan has a
maximize distance than existing plan so that
more advantage to open mine. Secondly,
infrastructure design of new dumping point
such as New Disposal, New Rompile, and New
LGOpile namely :
a. New Disposal Plan
Disposal plan used as Over Burden (OB)
material movement. Total OB in pit
compartment 02 is 105470 Wmt.
Therefore, New disposal plan should be
fulfilled its material. New disposal plan
will be showed in figure 3.9 namely:
Figure 3.9 New disposal plan
b. New Rompile Plan
Rompile plan used as Ore material
movement. Total Ore in pit compartment
02 is 59851 Wmt. Therefore, new rompile
plan should be fulfilled its material. New
rompile plan will be showed in figure 3.10
namely:
Figure 3.10 New rompile plan
c. New LGOpile plan
LGOpile used as Low Grade Ore (LGO)
material movement. Total LGO in pit
compartment 02 is 35084 Wmt. New
LGOpile will be showed in figure 3.11
namely:
Figure 3.11 New LGOpile plan
Based on new dumping point infrastructure all of
material had fulfilled to opening mine area in pit
compartment 02 block 1a5a1517 Bahodopi middle
of Sulawesi.
3) Mine out scenario
Mine out pit compartment 02 is a big hole in
after finishing mine activity. It will be solved
with run sustainability scheduling by looking
infrastructure design from pit compartment 02
block 1a5a1517 as existing scenario to run next
scheduling. According to road infrastructure
and far of compartment in this block, Pit
compartment 01 is continuing scheme to
opening new opening mine. In this case, It will
be showed that this mine responsible to take
care pit compartment 02 be used in this
scenario so this is we called by Green mine
infrastructure plan. It will be showed in figure
3.12 namely:
Figure 3.12 Mine out scheduling comp 01
Distance comparison among existing plan dan New Plan
from pit comp 02
face pit comp 02 - disposal existing plan 12.95
face pit comp 02 - rompile existing plan 12.41
faca pit comp 02 - LGOpile existing plan 14.028
New Plan pemindahan material pit Comp 02
Face - new disposal 5.25
Face - new Rompile 4.92
Face - new LGOpile 7.2
existing plan disp -> New Disp = 7.7 Km
existing plan Rompile -> New Rompile = 7.49 Km
existing plan LGOpile -> New LGOpile = 6.828 Km
existing Plan of material movement pit comp 02 distance (km)
NEW PLAN DISPOSAL
Triangulation Volume(M3)
s_bdisp_st_01 14772
s_bdisp_st_02 39665
s_bdisp_st_03 150493
total 204930
Triangulation Volume(M3)
dyke_disp_01 443.633
angle 45/26 derajat
project_level R-5
Height 5 meter
angle 45 derajat
berm 1 meter
project_level R-5
Height 5 meter
Disposal_01
dyke_dsp_01
Geometri Design
Geometri Design
access road
s_disp_st_03
s_disp_st_02
s_disp_st_01
dyke_disp
U
NEW PLAN ROMPILE
Triangulation Volume(M3) Luas_area
scut_rompile_01 157179.414 1.5 ha
sfill_rompile_01 136589.473
Triangulation Volume(M3)
bundwall_rom_01 6935.848
angle 45 derajat
berm 3 meter
project_level R5(cut)/R-5(fill)
Height 5 meter
angle 45 derajat
berm 1 meter
project_level R1(cut)/R-5(fill)
Height 5 meter
berm 1 meter
project_level R1(cut)/R-5(fill)
Height 5 meter
bundwall_Rom_01
Geometri Design
bundwall_Rom_01
Geometri Design
Rompile_01
access road
Cut Rompile
Fill Rompile
Bundwall_Rompile
U
NEW PLAN LGOPILE
Triangulation Volume(M3) Luas_area
scut_LGOpile 37822.472 1.42 ha
sfill_LGOpile 35407.568
Triangulation Volume(M3)
bundwall_LGOpile 3056.803
angle 45 derajat
berm 3 meter
project_level R5(cut)/R-5(fill)
Height 5 meter
angle 45 derajat
berm 1 meter
project_level R1(cut)/R-5(fill)
Height 5 meter
bundwall_LGOpile_01
LGOpile_pit comp_02
Geometri Design
Geometri Design
access road
Bundwall_LGOpile
Cut LGOpile
Fill LGOpile
U
5
Based on figure 3.12 pit compartment 02 has
over burden is 571783 Wmt. To fulfilled over
burden so we need disposal plan near in this
scheduling so that pit compartment 02 will be
used as usual area before mine activity. this
scenario conducted within use mine out pit
compartment 02 as Inpit disposal to load over
burden from pit compartment 01. Transition
design from mine out compartment 02 be inpit
disposal plan and pond will be showed in
figure 3.13 namely:
Inpit_disposal_dyke_pond_comp_02_
Triangulation Volume(M3) angle 45/26 derajat
s_bdisp_inpit_comp_01 22977 project_level R-5
s_bdisp_inpit_comp_02 72996 Height 5 meter
s_bdisp_inpit_comp_03 115795
s_bdisp_inpit_comp_04 36202
total 247969
Triangulation Volume(M3) angle 45 derajat
dyke_inpit_dsp 8199.772 berm 1 meter
project_level R-5
Height 5 meter
Triangulation Volume(M3) angle 45derajat
s_bpond_inpit_dsp.00 8879.703 project_level R-5
Height 5 meter
Inpit_Disposal
dyke_inpit_dsp.00t
Pond_inpit_dsp_comp_02
Geometri Design
Geometri Design
Geometri Design
Figure 3.13 Inpit disposal and pond plan
Based on this case, there are two point of view
namely firstly, distances among pit
compartment 02 to inpit disposal namely 2.35
Km nearer than new disposal plan 4.95 Km
and secondly, green infrastructure will be
happened because we used mine out pit
compartment 02 as inpit disposal where
disposal will be as reclamation area.
Therefore, if green mine infrastructure plan
will be implemented company, society and
government stayed in one vision and all of
problem in mine especially about mineral
security and uncertainly law will be solved
because mine society saved with this plan.
4. CONCLUTION
Based on The resulted of this research so will
be represented that green mine infrastructure
plan can be implemented in block 1a5a1517 by
number of fundamentally conclution namely :
1. Opening mine of Pit compartment 02 block
1a5a1517 Bahodopi middle of sulawesi can
be opened with new plan scenario until the
end of mine push back from level 820 up -
775 ultimate pit limit.
2. Green sustainability will happened with
signed mine out pit compartment 02 will
use as inpit disposal and fulfilled mine
scenario by effective distance and effective
infrastructure.
ACKNOWLEDGEMENT
Writer said thanks fullness to Contract of Work
(CoW) project mine development PT Vale
Indonesia especially mine plan team as great
division and Mine Engineering Hasanuddin
University for their chance and guidance for me
can be finished this researched . Hopefully your
kindness will be paid to Allah SWT.
REFERENCES
(1) Adiwagara, Gary. 2008. Evaluasi Efisiensi Tambang Terbuka (Open Pit) Menggunakan evaluasi Envelopment. ITS: Surabaya
(2) Amstrong, Margaret,. 1998. Basic Linear Geostatistik.
Springler-Verlag: Berlin Heidelberg,New york.
(3) Bar, Drew. 2012. Stochastic Dynamic Optimization of Cut-off Grade in Open Pit Mines. Queen’s University:
Canada.
(4) Christina, N.B. 2008. An Optimisation Aproach To Materials Handling in Surface Mines. Departement of
Mathematic and Statistic Curten University of
Tecnology: Switzerland.
(5) Dagleden, K. 2001. Open Pit Optimization Starategic For Improving Economic of Mining Project through Mine Planing. 17th International Mining Congress and
Exhibition:Turkey.
(6) Fuykschot, J. 2009. Strategic Mine Planning ; Flexible Planning to Meet Changes in the Business Environment. SRK Consulting: MINEX Conference.
(7) Ghost W.R, Zantop.H, Eggert R.G. 1998. International mineral Economic. Springler-Verleg: Berlin Heidelberg,
Newyork, London, Paris and Tokyo.
(8) Khustrulid, W, Kuchta, M. 2004. Open Pit Mine Planning & Design. London: Balkema Publishers
(9) Milan, B. 2009. Bulk Material Transportation System In Open Pit Mines With Improve Energy Eficiency.
University In Belgrade journal : Serbia.
(10) MGX, 2011. Mine geology training PT Vale Indonesia.
Soroako (Unpublished report)
(11) Mayor Hazard Standart (MHS) 4 dan 10 PT Vale Indonesia. 2000.Slope Stability.Soroako (Unpublished
report)
(12) PT. Vale Indonesia. 2012. Feasibility Study 3 – Cepat . Mine Plan Section. Soroako. (Unpublished report)
(13) Runge, Ian.C. 1998. Mining Economic and Strategy.
Society for mining,metallurgy,and exploration,inc. :
USA
(14) Stermole, F. 2001. Economic and Evaluation Decision Methods. Investment Evaluations Cooperation 3070 :
South Newcombe Way, Colorado
(15) Standar Operasional Prosedur (SOP) Pit Design dan CoG sensitivity PT Vale Indonesia. 2011. Soroako.(
Unpublished report)
(16) Torris, F.1998. Evaluating Mineral Project ; Aplication an Misconception. Society for Mining, Metalurgy, and
exploration,inc.USA.
(17) Waheed Ahmad.2005. Mine Geology at PT INCO. PT
Vale Indonesia : Soroako.
(18) Whittle,G., and Burk.S. 2010. Simultaneous Mining and Mineral Processing Enterprise Optimization For The Platinum Industry. The 4th International Platinum
Conference : Southern of Africa.
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