INDIRA, BHISMA (2022) ANALISIS KESTABILAN LERENG PADA PENAMBANGAN ANDESIT PT GUNUNG KULALET, KECAMATAN BALEENDAH, KABUPATEN BANDUNG, JAWA BARAT. Other thesis, UPN 'Veteran" Yogyakarta.
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Abstract
v
ABSTRAK
PT. Gunung Kulalet adalah perusahaan pertambangan yang bergerak pada
komoditas batu andesit yang terletak di Kelurahan Andir, Kecamatan Baleendah,
Kabupaten Bandung, Jawa Barat. Sistem penambangan menggunakan sistem
tambang terbuka metode kuari. Saat ini tinggi lereng penambangan yang diteliti
adalah 10,5 meter dengan sudut kemiringan lereng 77o
yang dicadangkan akan
menjadi lereng akhir penambangan. Sebelum dijadikan lereng akhir, PT Gunung
Kulalet berencana untuk mengoptimalkan lereng penelitian guna mendapatkan
cadangan komoditas batu andesit yang masih bisa dimanfaatkan untuk produksi
perusahaan.
Pemetaan geoteknik dilakukan dengan metode line mapping dan melakukan
observasi visual untuk mengetahui kondisi bidang diskontinu. Analisis kinematik
dilakukan untuk mengetahui jenis potensi longsor. Tingkat kestabilan lereng
dianalisis menggunakan metode kesetimbangan batas sesuai dengan potensi
longsor dan analisis statistik probabilitas longsor yang dilakukan dengan metode
Monte-Carlo.
Berdasarkan hasil proyeksi stereographic dan analisis kinematika, maka
diketahui potensi longsor yang terjadi pada lereng penelitian adalah potensi longsor
bidang dan potensi blok baji yang tidak dapat runtuh. Berdasarkan hasil analisis
kestabilan lereng diketahui lereng dalam kondisi yang aman. Optimasi dilakukan
dengan memvariasikan sudut kemiringan lereng yang ditegakkan hingga 90o
. hasil
variasi yang dilakukan memenuhi kriteria penerimaan dengan nilai faktor
keamanan (FK) ≥ 1,1 dan probabilitas longsor (PL) ≤ 50% sesuai dengan peraturan
pada KEPMEN ESDM No.1827 K/30/MEM/2018.
Kata Kunci: Analisis Kinematika, Analisis Kestabilan Lereng dan Optimasi
vi
ABSTRACT
PT. Gunung Kulalet is a andesite mining company located in Andir Village,
Baleendah District, Bandung Regency, Jawa Barat. The mining system uses open
pit mining system quarry method. Recently the height of the actual slope is 10,5
meters with an overall slope angle of 770 which is reserved will be the final slope
of mining. Before being used as the final slope, PT Gunung Kulalet plans to
optimize the research slope to obtain andesite commodity reserves that can still be
used for the company's production.
Geotechnical mapping is done by using the line mapping method and visual
observation to determine the condition of the discontinuities. Kinematic analysis
was performed to determine the type of landslide potential. The slope stability level
was analyzed using the limit equilibrium method according to the landslide
potential and the landslide probability statistical analysis was carried out using the
Monte-Carlo method.
Based on the results of stereographic projections and kinematic analysis, it is
known that the potential of the landslides that occur on the actual slopes is the
potential for planar slide and the potential for wedge blocks that cannot be collapse.
The results of slope stability analysis on the value of the safety factor and landslide
probability based on the potential for landslides, it is known that the slopes in the
both of potential slide stable. Slope stability optimization were done by varying the
slope angle which being enforced up to 90 o
. The results of the variations carried
out meets the acceptance criteria with factor of safety (FoS) ≥ 1,1 and probability
of failure (PoF) ≤ 50% according to KEPMEN ESDM No. 1827 K/30/MEM/2018.
Key words: Kinematic Analysis, Slope Stability and Optimization
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Analisis Kinematika, Analisis Kestabilan Lereng dan Optimasi |
| 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: | 13 Jul 2022 06:50 |
| Last Modified: | 13 Jul 2022 06:51 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/30365 |
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