PUJA WIYANA, YOSUA (2011) RANCANGAN SISTEM PENYALIRAN TAMBANG PADA AKHIR PENAMBANGAN DI BLOCK CENTRAL KAWI PT. MARUNDA GRAHA MINERAL, MURUNG RAYA PROVINSI KALIMANTAN TENGAH. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
Lokasi penambangan Batubara PT. Marunda Graha Mineral di Blok Central Kawi akan memasuki tahap akhir penambangan. Pada akhir penambangan
akan dilakukan kegiatan reklamasi yaitu reboisasi atau penghijauan kembali pada
lahan-lahan bekas tambang, untuk mendukung kegiatan ini diperlukan sistem
penyaliran tambang guna mempertahankan kondisi kerja yang aman. Sumber utama air tambang pada lokasi penambangan adalah air hujan
yang langsung masuk ke dalam tambang dan air limpasan. Berdasarkan analisis data curah hujan dari tahun 2005-2010, ditentukan intensitas curah hujan rencana
sebesar 90,14 mm/jam, sementara itu curah hujan rencana dari hasil statistik diketahui 260 mm/hari. Dengan menggunakan periode ulang hujan selama 3 tahun
dan resiko hidrologi sebesar 91,22 %
Untuk Mengendalikan arah aliran air agar tidak keluar langsung dari
daerah penambangan Blok Central Kawi menuju daerah sekitar penambangan,
maka dibuat saluran terbuka pada catchment area penambangan dengan dimensi
yang berbeda menuju kolam pengendapan. Bentuk saluran yang direncanakan
adalah trapesium. Dimensi saluran terbuka yang dirancang adalah sebagai berikut:
a. Saluran Terbuka 1 : a = 1 m; b = 1 m; B = 2 m; h = 1 m,
b. Saluran Terbuka 2 : a = 1 m; b = 1 m; B = 2 m; h = 1 m,
c. Saluran Terbuka 3 : a = 0,6 m; b = 0,6 m; B = 1 m; d = 0,5 m,
d. Saluran Terbuka 4 : a = 1 m; b = 0,8 m; B = 1,9 m; d = 0,8 m,
e. Saluran Terbuka 5 : a = 1 m; b = 1 m; B = 2 m; d = 1 m,
f. Saluran Terbuka 6 : a = 0,9 m; b = 1 m; B = 2 m; d = 1 m,
g. Saluran Terbuka 7 : a = 1 m; b = 1 m; B = 2 m; d = 1 m,
h. Saluran Terbuka 8 : a = 0,8 m; b = 1 m; B = 1,9 m; d = 0,8 m,
dan dilengkapi dengan dua gorong-gorong untuk menghubungkan saluran 1 dan
saluran 2, serta menghubungkan saluran 8 yang melewati jalan tambang yang
masing-masing berdiameter 1,2 m.
Kolam pengendapan yang akan digunakan sebanyak 4 kolam
pengendapan, dimana dua kolam pengendapan sudah tersedia, yaitu kolam
pengendapan 1 dan kolam pengendapan 4, untuk dimensi kolam pengendapan 2
dan 3 belum tersedia, maka direncanakan untuk Kolam Pengendapan 2 memiliki
dimensi : Luas = 1620 m2, kedalaman = 4 m, Panjang = 180 m, lebar = 9 m, volume = 6480 m3
. Sedangkan Kolam Pengendapan 3 memiliki dimensi Luas =
1647 m2, Kedalaman = 4 m, Panjang = 183 m, Lebar = 9 m, Volume = 6588 m.Pengerukan material padatan untuk Kolam Pengendapan 1 dilakukan
setiap 94 hari sekali. Kolam Pengendapan 2 dilakukan setiap 47 hari sekali.
Kolam Pengendapan 3 dilakukan setiap 47 hari sekali. Kolam Pengendapan 4
dilakukan setiap 373 hari sekali.
3
ABSTRACT
Coal mining location of PT. Marunda Graha Mineral in Blok Central Kawi
will enter the final stages of mining. At the end of the mining reclamation
activities will be carried back to the reforestation or afforestation on former
mining land, to support these activities required a system of mine dewatering to
maintain safe working conditions.
The main source of mine water at the mine site is a direct rain water into
the mine and water runoff. Based on analysis of rainfall data from the years 20052010,
the
plan
is
determined
by
the
intensity
of
rainfall
90.14
mm
/
hours,
while
the
rainfall
was
the
plan
from
the
statistical
results
are
known
260
mm
/
day.
By
using
a
return
period
rainfall
for
3
years
and
hydrological
risk
of
91.22%.
To control the direction of flow of water so as not to come out directly
from the mining region Block Central Kawi toward the area around the mine, then
made an open channel on the catchment area of the mine with a different
dimension to the setlling pond. The planned channel shape is trapezium.
Dimensions open channel designed are as follows:
a. Open channel 1: a = 1 m, b = 1 m, B = 2 m, h = 1 m,
b. Open channel 2: a = 1 m, b = 1 m, B = 2 m, h = 1 m,
c. Open channel 3: a = 0.6 m, b = 0.6 m, B = 1 m, d = 0.5 m,
d. Open channel 4: a = 1 m, b = 0.8 m, B = 1.9 m, d = 0.8 m,
e. Open channel 5: a = 1 m, b = 1 m, B = 2 m, d = 1 m,
f. Open channel 6: a = 0.9 m, b = 1 m, B = 2 m, d = 1 m,
g. Open channel 7: a = 1 m, b = 1 m, B = 2 m, d = 1 m,
h. Open channel 8: a = 0.8 m, b = 1 m, B = 1.9 m, d = 0.8 m,
and equipped with two culverts to connect the channel 1 and channel 2, and 8
channels connecting the mine road that passes through each of a diameter 1.2 m.
Settling pond well be used as many as 4 Settling pond, in which two
Settling pond are available, namely Settling pond 1 and Settling pond 4, Settling
pond dimensions for 2 and 3 are not yet available, it is planned for settling pond 2
has a dimension: Area = 1620 m
2
, depth = 4 m, length = 180 m, width = 9 m,
volume = 6480 m
3
. While settling pond 3 has a dimension: Area = 1647 m2, depth
= 4 m, length = 183 m, width = 9 m, volume = 6588 m3..
Dredging of the solid material for Settling pond 1 done every 94 days.
Settling pond 2 done every 47 days. Settling pond 3 done every 373 days. Settling
pond 4 done every 373 days
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 26 May 2016 03:51 |
| Last Modified: | 26 May 2016 03:51 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/2525 |
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