PUTRA, ALDOMA (2023) ANALISIS KESTABILAN LERENG TAMBANG BATUBARA PADA PIT SUNGKAI JOBSITE MUSTIKA INDAH PERMAI KECAMATAN MERAPI TIMUR KABUPATEN LAHAT PROVINSI SUMATERA SELATAN. Other thesis, UPN "Veteran" Yogyajarta.
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Abstract
iv
RINGKASAN
PT Manggala Usaha Manunggal (MUM) merupakan anak perusahaan dari PT
Titan Group bergerak di bidang kontraktor pertambangan. Lokasi penelitian berada
di jobsite PT Mustika Indah Permai (MIP), Kabupaten Lahat, Provinsi Sumatera
Selatan. Lokasi penelitian memiliki satu pit penambangan aktif yaitu pit Sungkai.
Penambangan batubara di lokasi penelitian menggunakan sistem tambang
terbuka dengan metode open pit, sehingga membentuk jenjang-jenjang lereng
tambang. Menurut Keputusan Menteri Energi, Sumber Daya dan Mineral
No.1827/K/30/MEM Tahun 2018 Tentang Pedoman Pelaksanaan Kaidah Teknik
Pertambangan Yang Baik dan Benar dalam penentuan lereng aman atau tidak harus
berdasarkan faktor keamanan (FK) dan probabilitas longsor (PL).
Analisis kestabilan lereng ini diharapkan dapat memberikan hasil berupa
rekomendasi geometri lereng yang aman berdasarkan nilai faktor keamanan lereng
yang telah ditentukan (FK ≥ 1,3 ) dan nilai probabilitas longsor (PL ≤ 20%) sesuai
Kepmen ESDM No.1827/K/30/MEM Tahun 2018.
Berdasarkan analisis yang dilakukan Lereng yang dikategorikan aman
menurut Kepmen ESDM no.1827/K/30/MEM tahun 2018 dengan FK ≥ 1,3 dan PL
≤ 20 % dengan ru coefficient 0,75 adalah lereng high wall di section A (FK = 1,64
; PL = 0%) , dan section C (FK = 1,3 ; PL = 16,67%), sedangkan lereng yang
dikategorikan tidak aman yaitu lereng high wall di section B (FK = 1,07 ; PL =
36,67%). Dilakukan perancangan ulang pada lereng yang dikategorikan tidak aman
dengan alternatif menaikkan elevasi pit bottom sebesar 20 m dan menurunkan
kemiringan lereng keseluruhan sebesar 2°. Memasang horizontal drains hole pada
dinding lereng.
v
ABSTRACT
PT Manggala Usaha Manunggal (MUM) is a subsidiary of PT Titan Group
engaged in mining contractors. The research location is at the PT Mustika Indah
Permai (MIP) job site, Lahat Regency, South Sumatra Province. The research
location has one active mining pit, namely Sungkai pit.
Coal mining in the research location uses an open pit mining system, so as
to form tiers of mine slopes. According to the Decree of the Minister of Energy,
Resources and Minerals No.1827/K/30/MEM of 2018 concerning Guidelines for
the Implementation of Good and Correct Mining Engineering Principles in
determining whether a slope is safe or not, it must be based on the safety factor
(FK) and landslide probability (PL).
This slope stability analysis is expected to provide results in the form of safe
slope geometry recommendations based on predetermined slope safety factor
values (FK ≥ 1.3) and landslide probability values (PL ≤ 20%) according to
Minister of Energy and Mineral Resources Decree No.1827/K/30/MEM of 2018.
Based on the analysis conducted, slopes that are categorized as safe
according to Minister of Energy and Mineral Resources Decree
no.1827/K/30/MEM of 2018 with FK ≥ 1.3 and PL ≤ 20% with a ru coefficient of
0.75 are high wall slopes in section A (FK = 1.64 ; PL = 0%), and section C (FK
= 1.3; PL = 16.67%), while slopes that are categorized as unsafe are high wall
slopes in section B (FK = 1.07 ; PL = 36.67%). Redesigned slopes that are
categorized as unsafe with an alternative of increasing the pit bottom elevation by
20 m and decreasing the overall slope by 2°. Installing horizontal drains holes on
slope walls.
| Item Type: | Thesis (Other) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 31 Jul 2023 02:31 |
| Last Modified: | 31 Jul 2023 02:31 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/36649 |
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