Institusion
Universitas Sriwijaya
Author
FILLY AGINDRA (STUDENT ID : 03021381320018)
M. Taufik Toha (LECTURER ID : 8864000016)
Abro, M. Akib
Subject
TN1-997 Mining engineering. Metallurgy
Datestamp
2019-10-01 03:56:00
Abstract :
PT. Muara Alam Sejahtera is a private company which engaged in coal mining sector. That coal mining is located at West Merapi Kabupaten Lahat. The company uses surface mining method. After the coal is mined, the coal where is at mine front is cleaned and processed to lose stone and gaunge matterial The coal has been mined by PT. Muara Alam Sejahtera Unit Pertambangan Kabupaten Lahat then sent or transported to Unit Stockpile Kota Palembang before marketed. There are two PT. Muara Alam Sejahtera?s S stockpile at
Palembang which is Kertapati and Tanjung Baru. If coal is acccomodated at
Kertapati is filled to capacity, so PT. Muara Alam Sejahtera make Tannjung Baru
Stockpile located at Tanjung Baru, Kelurahan Keramasan, Kecamatan Kertapati.
The Tanjung Baru stockpile is 24 Ha with 16.000 MT capacity and the stockpile
located adjacent to the musi river for easy selling. The coal is stockpiled at open
area so that rainwater will get in to stockpile area will obstruct activity at stockpile
therefore drainage area is so needed. Drainage system at Tanjung Baru stockpile is
by making open canal. The canal?s function to drain the water which enter the
stockpile area to mud settling pond.
The canal located surrounding stockpile area which is westside, middle, north, and
east stockpile in other hand the mud settling pond locsted at east side area is
functioned to contain the water mixed with coal mud at stockpile and streamed
through canal and ponded it at settling pond therefore when it is streamed to river
so will not pollute the environment..
After determining location of the canal and mud settling pond so the catchment
area is 0.1884 km2 from catchment area and rainfall plan from that location the
water debit which enter the stockpile area is 0,7054 m2/ detik. To contain water
entering to stockpile area needed open canal dimension with water depth (d) =
0,7014 m; canal depth (h) = 0,8416 m; base canal widht (b) = 0,8066 m; surface
widht (B)= 1,62 m; camal outside length (a)= 0,8099 with the flow is 0,6978 m3 /
detik and the mud settling pond dimension with mud settling pold volume ;=
2077,8071 m3 by that volume has settling time 20,215 minures and doing once
dredging every 42 days.