SUTRISNO, HERMAWAN PUTRO (2016) KAJIAN TEKNIS FRAGMENTASI PELEDAKAN UNTUK MEMENUHI TARGET PRODUKSI DI PIT 3000 BLOK 03 PT. MITRA ALAM PERSADA JOBSITE TRUBAINDO COAL MINING, KUTAI BARAT, KALIMANTAN TIMUR. Other thesis, UPN 'VETERAN" YOGYAKARTA.
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Abstract
PT. Mitra Alam Persada (MAP) is a company that moves in various services
of mining sector that is rental instrument, overburden removal, overburden
loading, overburden hauling, coal excavation, coal loading, coal hauling and mine
planning. PT. MAP is one o f contractor company that handle mine projects of
PT. Trubaindo Coal Mining (TCM) which is located in Kutai Barat, Kalimantan
Timur.
PT. TCM devided into two blocks of mine area, that is North Block and
South Block. PT.MAP is located in South Block of PT.TCM, precisely in Pit
3000 Block 03. The coal condition in South Block is multiple seams and the
thickness of the coal is between 2,50-3 m with 30
0
of slope from horizontal plane.
Mining system that is applied in PT. MAP jobsite PT. TCM is surface mine
system. The coal production target of PT. MAP is 85.000 ton in August 2015 and
the overburden production target is 620.000 BCM in August 2015.
On observations made in the field found the problems associated with rock
fragmentation size as blasting results. The target’s percentage of rock
fragmentation after blasting with size >80 cm (boulder) is less than 20% from
blasting rock material. In actual condition, the rock fragmentation with size >80
cm percentage as results from five times blasting in PT. MAP is more than 20%
which is consist of 28,77% in 12
nd
August 2015; 28,33% in 14
th
August 2015;
29,17% in 18
th
August 2015; 29,37% in 22
nd
August 2015; 30,41% in 26
th
August 2015. In some experiments that have been done in 27
th
August 2015 there
are 20,93% of boulder and in 31
st
August 2015 there are 19% of boulder.
Blast geometry that applied by PT. MAP which have 7 m of burden and 8
m of spacing with8-8,5 m of drill hole length, can not achieve the target of rock
fragmentation with size >80 cm percentage which is less than 20%. Based on blast
geometry calculation according R.L. Ash (1967) and increasing the area of energy
coverage, blast geometry that should be applied is 6 m of burden, 7 m of spacing,
4,2 m of stemming, 4,6 m of powder charge, 9 m of drill hole length and
increasing powder factor from 0,22 kg/m
3
becomes 0,32 kg/m
3
. Simulation of
recommendation blast geometry using Kuz-Ram method produce 14,03% of
rock fragmentation after blasting with size >80 cm and 14,7% of corrected rock
fragmentation after blasting with size >80 cm
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 16 May 2016 03:32 |
| Last Modified: | 16 May 2016 03:32 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/956 |
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