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) |
|---|---|
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | 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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