WIDAYAT, WENDY SURYO (2012) RANCANGAN SISTEM PENYALIRAN TAMBANG BUKIT O1 TAMBANG SELATAN DI PT. ANEKA TAMBANG (PERSERO) Tbk UNIT BISNIS PERTAMBANGAN NIKEL POMALAA SULAWESI TENGGARA. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
RINGKASAN
Sumber utama air tambang dilokasi penambangan adalah air hujan dan air
limpasan. Air tanah tidak memberikan kontribusi terhadap debit air yang masuk
kedalam tambang. Lokasi penambangan berada pada elevasi tertinggi dan
berbatasan dengan laut.
Berdasarkan data yang diperoleh dari Badan Meteorologi dan Geofisika
Pomalaa-Kolaka mengenai curah hujan daerah Kecamatan Pomalaa dan
sekitarnya maka diperoleh harga curah hujan harian maksimum sebesar 102,63
mm/hari dan curah hujan rencana berdasarkan perhitungan adalah 129,525
mm/hari pada periode ulang hujan 5 tahun.
Total debit air hujan yang langsung tercurah ke lokasi tambang pada luasan
0,1829 km2 adalah 0,217 m3/detik, dan debit air tanah 0 m3/detik sedangkan debit
air limpasan pada daerah tangkapan hujan tidak sama, tergantung dari luas daerah
tangkapan hujan, intensitas curah hujan rata-rata daerah kerja penambangan dan
nilai koefisien limpasan pada masing-masing daerah tangkapan hujan. Debit air
limpasan pada masing-masing daerah tangkapan hujan adalah sebagai berikut :
a. DTH I, Luas = 0,0279 km2, Q = 0,203 m3/detik
b. DTH II, Luas = 0,0369 km2, Q = 0,246 m3/detik
c. DTH III, Luas = 0,0307 km2, Q = 0,228 m3/detik
d. DTH IV, Luas = 0,0521 km2, Q = 0,361 m3/detik
e. DTH V, Luas = 0,0353 km2, Q = 0,253 m3/detik
Dengan memperhatikan air yang masuk ke lokasi tambang, maka metode
Mine Drainage System yang dibuat dengan cara membuat paritan dan sumuran
serta pembuatan kolam pengendapan. Dengan memanfaatkan perbedaan
ketinggian air akan dialirkan menuju daerah yang lebih rendah sehingga tidak
membutuhkan pompa dan instalasi pipa. Saluran dibuat pada elevasi terendah hal
ini diharapakan dapat menampung air limpasan yang ada. Ukuran tiap saluran
yaitu :
a. Saluran 1 : a = 0,5 m; b = 0,5 m; B = 1 m; h = 0,5 m,
b. Saluran 2 : a = 0,6 m; b = 0,6 m; B = 1,81m; h = 0,6 m,
c. Saluran 3 : a = 0,5 m; b = 0,5 m; B = 0,9 m; h = 0,5 m,
d. Saluran 4 : a = 0,6 m; b = 0,6 m; B = 1,1 m; h = 0,6 m,
e. Saluran 5 : a = 0,5 m; b = 0,5 m; B = 0,9 m; h = 0,5 m,
Pembuatan sumuran didasarkan pada jumlah debit air yang masuk dan
didasarkan pada alat gali yang digunakan yaitu Backhoe Komatsu PC200-6 serta
penempatan sumuran berada pada elevasi rendah. Sumuran 1 dengan debit yang
masuk adalah 0,449 m3/detik berada pada elevasi 91 mdpl dan sumuran 2 berada
pada elevasi 97 mdpl dengan jumlah debit yang masuk 0,652 m3/detik sedangkan
sumuran 3 berada pada elevasi 111 mdpl dengan jumlah debit air yang masuk
0,253 m3/detik.
Abstract
The main source of mine water mining location is rain water and runoff
water. Ground water does not contribute to discharge water into the mine. Mine
sites are at the highest elevation and is bordered by the sea.
Based on data obtained from the Meteorology and Geophysics Pomalaa-
Kolaka about rainfall Pomalaa District and surrounding area of the obtained
price of the maximum daily rainfall of 102.63 mm / day and rainfall plan based on
the calculation is 129.525 mm / day in 5 return period rainfall years.
Total discharge rainwater directly poured into the mine site in an area of
0.1829 km2 is 0.217 m3/second, and 0 m3/second groundwater discharge while
discharge water runoff in the catchment area of rain is not the same, depending
on the rainfall catchment area, rainfall intensity average rainfall areas of mining
work and the value of the coefficient of runoff in each catchment rainfall.
Discharge of water runoff in each catchment area of rain is as follows:
a. DTH I, Area = 0.0279 km2, Q = 0.203 m3/second
b. DTH II, Area = 0.0369 km2, Q = 0.246 m3/second
c. DTH III, Area = 0.0307 km2, Q = 0.228 m3/second
d. DTH IV, Area = 0.0521 km2, Q = 0.361 m3/second
e. DTH V, Area = 0.0353 km2, Q = 0.253 m3/second
By considering water resources that go into the mine site, then the method
of Mine Drainage System made by open channel and sump of how to create and
manufacture of outdoor precipitation. By utilizing the difference in height of the
water will be channeled towards the lower area so it does not require the
installation of pumps and pipes. Channels made at the lowest elevation it is
expected to accommodate existing runoff water. The size of each channel are:
a. Channel 1: a = 0.5 m, b = 0.5 m, B = 1 m, h = 0.5 m,
b. Channel 2: a = 0.6 m, b = 0.6 m, B = 1.81 m, h = 0.6 m,
c. Channel 3: a = 0.5 m, b = 0.5 m, B = 0.9 m, h = 0.5 m,
d. Channel 4: a = 0.6 m, b = 0.6 m, B = 1.1 m, h = 0.6 m,
e. Channel 5: a = 0.5 m, b = 0.5 m, B = 0.9 m, h = 0.5 m
Manufacture of sinks is based on the amount of water intake and
discharge are based on the use of digging tools Backhoe Komatsu PC200-6 as
well as the placement of wells located at low elevation. Pitting one with the
incoming flow is 0.449 m3/second located at an elevation of 91 meters above sea
level and 2 wells located at an elevation of 97 meters above sea level with a
number of the incoming flow while pitting 0.652 m3/second, 3 are at an elevation
of 111 meters above sea level with the amount of water discharge into 0.253 m3/
second.
| 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: | Eko Suprapti |
| Date Deposited: | 12 Aug 2016 02:34 |
| Last Modified: | 12 Aug 2016 02:34 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/5143 |
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