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All Journal Bulletin of Scientific Contribution : Geology Journal of Geosciences and Applied Geology
Sahala Manullang
PT. Pamapersada Nusantara
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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JENIS LONGSORAN BERDASARKAN BIDANG DISKONTINUITAS PADA TAMBANG TERBUKA BATUBARA PT. PAMAPERSADA NUSANTARA DISTRIK ASMI, KALIMANTAN TENGAH Faisal Akbar; Raden Irvan Sophian; Dicky Muslim; Sahala Manullang
Bulletin of Scientific Contribution: GEOLOGY Vol 18, No 2 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc geology.v18i2.27598

Abstract

Kehadiran struktur geologi pada lereng tambang terbuka merupakan kerugian yang dapat menjadikan lereng tidak stabil atau rentan longsor. Analisis kinematik untuk lereng tambang terbuka merupakan salah satu aspek yang penting terhadap pengaruh struktur geologi dalam meminimalisir terjadinya tanah longsor. Tujuan dari penelitian ini yaitu untuk mengetahui potensi tipe longsoran pada lereng penelitian. Metode yang dilakukan yaitu dengan pengumpulan data sekunder, observasi lapangan, dan analisis kinematik. Hasil penelitian menunjukkan bahwa lereng daerah penelitian disusun oleh material batuan sedimen berupa batupasir, batulempung, batulanau, batulempung karbonan, dan batubara. Struktur geologi yang berkembang berupa kekar dan dua buah sesar normal yang berdekatan serta memiliki strike/dip 317°E/74° dan N 296°E/35°. Akibat dari perbedaan nilai strike/dip tersebut menyebabkan sesar normal saling berpotongan yang dapat menjadi penyebab longsoran. Dengan demikian, lereng daerah penelitian memiliki potensi tipe longsoran baji sehingga perlu dipertimbangkan dalam proses penambangan selanjutnya.Kata kunci : analisis kinematik, kestabilan Lereng, struktur geologi
EFFECT OF BEDDING PLANES ON SLOPE STABILITY IN COAL OPEN MINE PT. PAMAPERSADA NUSANTARA DISTRICT ASMI, CENTRAL KALIMANTAN Faisal Akbar; Raden Irvan Sophian; Dicky Muslim; Sahala Manullang
Journal of Geological Sciences and Applied Geology Vol 4, No 1 (2020): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i1.29069

Abstract

Bedding planes are one of the distinctive features of an open coal mine. The presence of the bedding planes can be a slip surface on a slope that has a dip direction relatively in the same direction as the bedding planes. Kinematic analysis for open pit slopes is one important aspect of the influence of the bedding planes in minimizing the occurrence of landslides. The purpose of this research is to explain the effect of the presence of bedding planes on slope stability. The method used is secondary data collection, field observations, and kinematic analysis. The results showed that the slopes of the study area were composed of sandstone, claystone, siltstone, carbonaceous claystone, and coal. Carbonanaceous claystone as a weakly layer. The rock bedding area on this slope has a strike/dip N 288 ° E / 17 °, while the slope of the research has an overall slope 29 ° and a slope dip direction N 15 ° E. The dip direction value that is relatively unidirectional between the bedding planes and the slope of the research with a difference of 3 ° can be the cause of the slip surface and is prone to landslides. Thus, the slopes of the study area have the potential plane failure so that geotechnical engineering is needed in the next mining process to ensure slope stability.
Co-Authors Dicky Muslim Faisal Akbar Faisal Akbar Raden Irvan Sophian Raden Irvan Sophian