KAJIAN TEKNIS SISTEM PENYALIRAN TAMBANG BATUBARA PADA PIT 4 IUP 149 PT. DEWA RUCI MANDIRI KABUPATEN NUNUKAN PROVINSI KALIMANTAN UTARA

M.M ROMPAS, FERRO (2015) KAJIAN TEKNIS SISTEM PENYALIRAN TAMBANG BATUBARA PADA PIT 4 IUP 149 PT. DEWA RUCI MANDIRI KABUPATEN NUNUKAN PROVINSI KALIMANTAN UTARA. Other thesis, UPN ''VETERAN'' YOGYAKARTA.

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Abstract

PT. Dewa Ruci Mandiri terletak di antara Desa Sekikilan dan Desa
Seumat, Kecamatan Sebuku, Kabupaten Nunukan, Provinsi Kalimantan Utara
memiliki IUP seluas 149,9 Ha. Sistem Penambangan yang dilakukan
menggunakan sistem tambang terbuka (SurfaceMining). Salah satu pendukung
dari usaha penambangan adalah penyaliran yang berfungsi untuk mencegah
masuknya air (Mine Drainage) dan mengeluarkan air yang telah masuk
menggenangi daerah penambangan (Mine Dewatering).
Berdasarkan analisis data curah hujan tahun 2003-2013, diperoleh curah
hujan rencana sebesar 118,89 mm/hari, intensitas curah hujan 41,2 mm/jam
dengan periode ulang hujan 3 tahun dan resiko hidrologi adalah sebesar 86,9%.
Daerah Tangkapan Hujan (DTH) lokasi penelitian dibagi menjadi 4 DTH, yaitu
DTH I 0,0155 km2, DTH II 0,1077 km2, DTH III 0,0360 km2, DTH IV 0,0760
km2. Debit air pada setiap DTH adalah DTH I 0,054 m3/detik, DTH II
0,44m3/detik, DTH III 0,12 m3/detik ,DTH IV 0,46 m3/detik. Saluran terbuka
berfungsi untuk menampung limpasan permukaan pada suatu daerah dan
mengalirkannya ke tempat penampungan air, dengan dimensi saluran terbuka
sebagai berikut:
a. Saluran I B= 1 m; b = 0,5 m; d = 0,41 m; h = 0,5 m; a = 0,6 m,
b. Saluran II B = 1,35 m; b = 0,7 m; d = 0,59 m; h = 0,7 m; a = 0,8 m,
c. Saluran III B= 1,4 m; b = 0,68 m; d = 0,59 m; h = 0,7 m; a = 0,8 m.
kemudian untuk air yang masuk kedalam bukaan tambang dialirkan secara alami
ke dalam sumuran dengan dimensi sumuran hasil pengolahan data yaitu 2415 m3.
Selanjutnya air yang terdapat di sumuran dipompa menuju kolam pengendapan,
jumlah pompa yang digunakan ada 3 pompa Yanmar YSP-80E, dengan lamanya
waktu pemompaan selama 13 jam. Dimensi Kolam pengendapan pit 4 terdiri dari
tiga kompartemen dengan volume 480 m3 dan waktu pengerukan 239 hari sekali

Dewa Ruci Mandiri Company Independent located between the village
Sekikilan Seumat, Sebuku, Nunukan, North Kalimantan province has IUP of
149.9 ha. Mining system were performed using open pit system (SurfaceMining).
One supporter of mining is Drainage which serves to prevent the ingress of water
(Mine Drainage) and remove the water that has entered the area flooded mine
(Mine Dewatering) Drainage system is an attempt to prevent the ingress of water
or to remove water that has entered the mining area which can interfere with
mining activities. Therefore, it is necessary to study Drainage system existing
mines. Based on the analysis of rainfall data of 2003-2013, obtained by
precipitation plan of 118.89 mm / day, rainfall intensity of 41.2 mm/hour with a 3-
year return period rainfall and hydrological risks of 86,9%. Catchment Rain
(DTH) at the study site is divided into 4 DTH, ie DTH I 0,0155 km2, 0.1077 km2
DTH II, III 0.0360 km2 DTH, DTH IV 0.0760 km2.Water discharge at any DTH
DTH is the first 0.054 m3 / sec, DTH II 0.44 m3 / sec, DTH III 0.12 m3 / sec, DTH
IV 0.46 m3 / sec. Open channel serves to accommodate runoff in an area and flow
into water reservoirs, with an open channel dimensions as follows :
a. Channel I B = 1 m; b = 0.5 m; d = 0.41m; h = 0.5 m; a = 0.6 m,
b. Channel II B = 1.35 m; b = 0.7 m; d = 0.59 m; h = 0.7 m; a = 0.8 m,
c. Channel III B = 1.4 m; b = 0.68 m; d = 0.59 m; h = 0.7 m; a = 0.8 m.
then to the water that goes into the mine openings flowed naturally into the
wells with dimensions of pitting the data processing that is 2415 m3. Furthermore,
the water contained in the wells is pumped into settling ponds, the number of
pumps which are used there are 3 pumps Yanmar YSP-80E, with the length of
time pumping for 13 hours. Sump Dimensions pit 4 consists of three
compartments with a volume of 480 m3 and 230 days to dredging.

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: Erny Azyanti
Date Deposited: 03 Jun 2016 07:22
Last Modified: 03 Jun 2016 07:22
URI: http://eprints.upnyk.ac.id/id/eprint/2985

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