Analisis Kestabilan Lereng Menggunakan Metode Slope Mass Rating (SMR) dan Software Geoslope/W 2007 pada Tambang Air Laya Selatan Lokasi Suban Di PT Bukit Asam (Persero) Tbk

Slope Stability Analysis using Slope Mass Rating (SMR) method and Software Geoslope/W 2007 at South Tambang Air Laya Location Suban in PT Bukit Asam (Persero) Tbk

  • Nabila Faradibah Jurusan Teknik Tambang Fakultas Teknik Universitas Bangka Belitung
  • Yayuk Apriyanti
  • Irvani Irvani Jurusan Teknik Tambang Fakultas Teknik Universitas Bangka Belitung

Abstract

PT Bukit Asam (Persero) Tbk was one of the Indonesian State Owned Enterprises which conduct to
coal mining. During the process of coal mining, demolition overburden resulted in a change of force
and also set up new structures and caused differences in stress distribution thereby changing the
strength of the rock mass. This result the mining slope becomes unstable and could cause a lot of
harm, therefore the analysis of slope stability was carried out. This study was conducted to
determine the quality of the rock mass slope based on the value SMR (Slope Mass Rating), direction
of failure using the analysis of kinematics by Dips software and Safety Factor value (SF) based on
Morgenstern Price method using Software Geoslope / W 2007. The data used in this study includes
data UCS, RQD, spacing of discontinuity, discontinuity conditions, groundwater conditions and data of
discontinuity orientation. Data retrieval was divided into 9 scanline slopes. The analysis indicated
quality of the rock mass and degree of slope stability based on the SMR for scanline I, VII and IX were
very good with a very stable condition, Scanline II, III, IV, V, VI and VIII had good quality with a steady
slope conditions. The Possibility of slope failure occured only in several blocks for Scanline II, IV, V, VI
and VIII. After the analysis of kinematics for Scanline III, IV and V had directions of failure to Scanline
III was N 490 E, Scanline IV was N 500 E and Scanline V was N 480 E. Values of Safety Factor (SF)
single slopes from 9 scanline was estimated to 3.254 - 44.737 (safe condition) and the overall slope of
1.85 to 4.09 (safe condition). It was concluded that overall the existing slope on the location Suban
were in a safe condition for SF value >1.25.

Keywords: slope stability, slope mass rating, kinematics analysis, safety factor

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Published
2020-02-02
How to Cite
Faradibah, N., Apriyanti, Y., & Irvani, I. (2020). Analisis Kestabilan Lereng Menggunakan Metode Slope Mass Rating (SMR) dan Software Geoslope/W 2007 pada Tambang Air Laya Selatan Lokasi Suban Di PT Bukit Asam (Persero) Tbk. MINERAL, 1(1), 17-25. https://doi.org/10.33019/mineral.v1i1.1605
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