LOADING

PT. Kaltim Prima Coal

Muhammad Hanif P. (D62113001)

Adventius Ronald P. (D62113004)

Yudhi Ryinaldi (D62113007)

Risastri Ridwan (D62113008)

Yuni Wulan A. (D62113014)

Abdurrahman Jauhari (D62113018)

Angga Al-Amin (D62113301)

Rahma Kasna (D62113303)

Yosita P.Parissing (D62113304)

Rizky Isal (D62113306)

Reifan Fahrisyah (D62113313)

Sahmudin (D62113318)

Aisyah Welina (D62113319)

KPC LOCATION

History

1978The Government of Indonesia invites tenders fromforeign companies for the exploration anddevelopment of coal resources in east and southKalimantan. A British Petroleum International Ltd andConzinc Rio Tinto of Australia Ltd joint venture wassuccessful in bidding for an area of 7,900 sq. km intwo blocks extending 300 km along the coast ofeastern Kalimantan

1982PT Kaltim Prima Coal (KPC) incorporated in Indonesia with BritishPetroleum International Ltd and Conzinc Rio Tinto of AustraliaLtd each holding 50% of the shares. KPC licensed to conductexploration and mining of coal based on a Coal Contract ofWorks (CCOW) with the concession covering 90,706 ha. TheIndonesian State Coal Company (PTBA) to receive 13.5%entitlement of all production

1988KPC decision to proceed with the developmentof an export mine with a design capacity of 7million tonnes per annum (Mtpa) followingdetailed exploration and a feasibility study ofprospects close to Sangatta. The prospect hassubstantial quantity of high quality coalreserves, is close to a coast line with deepwater and is strategically located to servicegrowing markets. KPC subsequently relinquishedmost of the original Agreement Area, retaining1,961 sq. Km

1989Construction commences in January. The budgetfor the project is US$570 M

1990Work on the large scale mine developmentcommences in June

1991All major items were commissioned by late

1991

1992Commercial exports begin in January 1992

2003October 2003 – sold to PT Bumi Resources Tbk

and East Kutai Regional Government.

2007July 2007 – 30% of shares owned by PT Bumi

Resources Tbk sold to Bhira Investment Ltd (formerly known as Tata Power).

The purpose this geological investigation is to identify the contained, presence, size, shape, distribution, quantity, and quality of a coal deposit as the basis of analysis / study the possibility of investment. The investigation stage determines the level of the coal resources be produce.

Mining preparation stage begins with exploration surveys. Exploration activities include maping field, measurements of geological structures, outcrop sampling, exploration drilling, geophysical logging, and valuation reserves.In KPC there are 3,579 million tonnes of coal resources and634 million tonnes of coal reserves

Another case if the purpose of the use is foragriculture / plantation, the top soil is a veryuseful element that must be handled withcare and caution so that the damage andloss of topsoil can be minimized. Similarly, inthe works of mining, coal mining carried outby setting aside or keep top soil in a place,which will be after the completion of miningcan be used to get the results back forreclamation (back felling) so that thecondition of the ground surface can becarried out replanting (reboasasi).

DrillDrilling activities conducted on the coalcompanies to obtain more detailed data andcan be accurately estimated reserves, otherthan that the data can also be used to obtaincoal quality, engineering geological data, todrilling and hydrogeology can be seengroundwater levels and type.In Kaltim Prima Coal used core drilling (coredrilling). But before doing the drilling we firstdetermine the point of the drill to do a GPScapitalize stake out point. Then do themanufacture of drill pad (broad andconditions are tailored to the needs) useddozer (usually for non-portable rig) while forthe manufacture of portable drill rig pad.product that comes out is the core of the rockas shown below

BlastingIn mining company Kaltim Prima Coal, usual used methods of delay blasting. Electricdetonator is a type of detonator that its ignition with electrical current delivered via aspecial cable to it on both ends of the tube into the kable electric detonators fitted withfine wire types are bare electric current which, if passed would glow. In principle, thecomposition and content of this type, the same as the detonator detonator usual,incandescent of fine wire will burn the herb burner and then touch the main field resultingin jerky waves that will blow up a basic stuffing, so it appears here that the same principleof electric detonators with usual detonator difference only on switch on. "Delay Blasting":blasting is performed sequentially few seconds.

OB (Over Burden)Overburden is the integumentary layerminerals which usually consists of:- Top Soil- Sub-Soil- Core soil layer (sand Stone, Clay, andothers - others)

Overburden removal is activity to movematerial from demolition excavator(backhoe or shovel type excavators) fromthe loading point to the accumulation /disposal called the planned disposal.

The disposal there are 2 types of backfill and waste dump / outpit dump.Backfill is stacking /disposal of overburden removal activity results that are within the mine area .Waste dump /dump outpit is stacking / disposal proceeds overburden removal activity that is outside thearea mine.

The dispatch system is the industry’s most trustedfleet management solution. Available for bothsurface and underground mines, the dispatchsystem lets you implement specific productionstrategies using an extensive set of mining tools.Dispatcher is one that sends out trains, buses,trucks, or cars according to a schedule.KPC operates six to 12 individual open pits at anytime, the average stripping ratio being 7.5bcm(bank cubic metres) of overburden per tonne ofcoal. The overburden material degrades quicklyon exposure to the atmosphere and generallyprovides easy digging.Some overburden rock requires blasting to ensureadequate fragmentation for the shovels. KPCcarries out its own mining in most of the pits, butalso contracts out a smaller proportion of its miningrequirements.

The management of a geotechnicalproject requires a wide range ofimportant information coming from thesensors, which are of vital importancefor correct execution of constructionplans and to refine soil models.

Geotechnical applications mainlyconcern constructions where engineeringproperties of rock and soil must beconsidered. The capacity of the groundto support constructions is studied byengineers with geotechnicalinstrumentation.

Coal MiningKPC’s mining operation is conducted by KPC through ourMining Operation Division (MOD) and a number ofcontractors. KPC does not collaborate with artisanal andsmall-scale mining (ASM). This year, we managed to openone new pit called Tamara pit with an estimatedproduction capacity of 600 thousand tons of mined coal.

Coal1. Prima (antrasit)Prima coal is one of the highest quality internationally traded thermal coals. It isa high volatile bituminous coal with high calorific value, very low ash, moderatesulphur, and relatively low total moisture. It is a bright and lustrous coal with highvitrinite content. Prima comes primarily from six main seams in pits that arelocated close to the Pinang Dome. Higher temperatures and pressure in coalseams near the Dome resulted in coal with lower moisture and consequentlyhigher heat content. With sparkling black color (luster) metallic, containingbetween 86% - 98% elemental carbon (C) with a water content of less than 8%.

2. Pinang (bituminous)

Pinang coal is similar to Prima coal but with higher moisture and lower energy. contains 68-86% elemental carbon (C) and the water level of 8-10% by weight.

3. Melawai (sub- bituminous)

Melawan coal is an ultra clean sub-bituminous coal with ultra low ash and sulphur contents. Pinang and Melawan coal are located further away from the Dome and contained in seams generally higher in the stratigraphic sequence. contains less carbon and more water, and therefore a source of heat is less efficient compared to bituminous.

StockpileServes as a buffer between stockpile and delivery process, as a strategic inventory of the short-term disruption or long term. Stockpile also serves as a process of homogenization or mixing coal and to prepare the required quality. Understanding Stockpile is a storage area / buildup of coal mining. Stockpile is also used to mix coal homogenization that aims to prepare a product of one type of material in which fluctuations in coal quality and comparable size distribution.

Coal is received from off-roadtrucks with a capacity of 100 to 220-tonnes at the truck dump hopper. Thehopper is located at the western end ofthe stockpile and consists of a single 300-tonnes hopper, with main dump face. Thetruck dump area will have a secondaryside dump face at a future date. Thehopper discharges through a feederbreaker to the sizer station feed conveyor.The feeder breaker reduces the receivedcoal from 500 mm to 200 mm x 0 mm atan average capacity of 2,000 MTPH(2,500 MTPH peak).

At the sizer station the coal is further reduced to 50 mm x 0 mm, and then it isconveyed and discharged to the stockage pile with a traveling tripper. The storage pile has atotal capacity of 200,000 tons

Coal crushing stages

1. Vibrating feeder2. Jaw crusher3. Impact crusher4. Cone crusher

A simple stockpile is formed by machinery dumping coal into a pile, either from dump trucks, pushed into heaps with bulldozers or from conveyor booms. More controlled stockpiles are formed using stackers to form piles along the length of a conveyor, and reclaimers to retrieve the coal when required for product loading, etc.

Trucks Units Capacity

Liebherr T282 31 360 tonnes

Hitachi EH 4500/5000 111 280 tonnes

Caterpillar 789 96 188 tonnes

Caterpillar 785 55 135 tonnes

Komatsu HD785 64 90 tonnes

Caterpillar 777 38 90 tonnes

Diggers Units Capacity

Liebherr R9800 3 45 m3

Liebherr 996 18 32 to 34 m3

Hitachi EX3600 11 23 to 24 m3

Hitachi EX 3500 6 22 m3

Hitachi EX 2500 4 15 – 16 m3

Liebherr 984C 4 5 – 8 m3

MAINTENANCE

The mine site contains separate stockpiles forthe Prima and Pinang products, holding 60,000tand 35,000t respectively. Coal is reclaimedand transported by a 13km-long, 2,100t/h-capacity overland conveyor to Kaltim Prima’sdedicated port facilities at Tanjung Bara.Further stockpiles hold a live capacity of350,000t of Prima and 150,000t of Pinangcoals. Coal is transferred directly from mine toship whenever possible.Vessels of up to 220,000dwt can be handledby the port, with loading facilities at the end ofa 2km-long jetty. Twin quadrant loaders caneach handle up to 4,700t/h, the normal loadingthroughput.

With selective mining, over 90% of therun of mine coal only needs crushing andblending to give export quality KaltimPrima Coal. Coal from the seam roofsand floors contains more mineralmaterial, and so has to be washed. This'dirty Prima' and Pinang material ishandled separately from the 'cleanPrima', with individual streams for thedifferent raw materials.

After crushing to 50mm in Gundlach rollscrushers, the washing plant uses densemedium cyclones for 0.5mm to 50mmfeed, and spirals for the 0.5mm material,products being dewatered in centrifugesbefore blending into the Prima Coalstockpile.

Transportation is the activityundertaken to transport orcarry materials or precipitateminerals from the mining frontwas taken to mills for furtherprocessing.

Transportation activities using the Dump Truck that I was thentaken to the stockyard, where processing occurs at the site todo the crushing (crushing).

After passing the last crushingprocess, coal was brought to thestockyard 2 or coal storagelocations in accordance with apredetermined size.

Coal is already experiencingreduced and ready for sale will betransported using a dump truck tothe location of the coal pile at theport. And by using a conveyor beltcoal carrying to coal barging andthen brought to the vessel coalloading.

7500tph Twin Quadrant Ship

Loaders

Facility can handle up to 220kt Cape size

vessels

Reclamation associated with mining activities is recovery the land and vegetation in forest areas damage the risk of mining activities to be able optimally functional.

A few example of PT.KPC’s reclamation : Forest called Arboretum Lake of Batu Arang Tourist area by building facilities that support tourism activities such as, lodge, boat tours,

children's play facilities, and areas paintball. Training center for integrated dairy farms in former mining areas are equipped building training facilities, stables and cattle farm area, the use of cow manure for biogas and

composting home. plantations of oil palm

Approximately 153 species of flora and nurseries have been developed by KPC.

PT. KPC has cultivated more than 7,500 mangrove seedlings to extend the Bekantan monkey habitat and emerald dove.

Process of PT. Kaltim Prima Coal reclamation.