STABILITY ANALYSIS OF HIGWALL SLOPE PT XYZâS OPEN COAL MINING IN SOUTH KALIMANTAN
Mining activities are complex and full of high-risk activities which means all of safety aspects that supporting all activities in the mining sector must be considered, one of which is the stability of mine slopes. The problem of slope stability analysis will always be faced with the problem of u...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/61026 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Mining activities are complex and full of high-risk activities which means all of
safety aspects that supporting all activities in the mining sector must be considered,
one of which is the stability of mine slopes. The problem of slope stability analysis
will always be faced with the problem of uncertainty from the physical and
mechanical properties of rocks. Simple slope stability analysis using the concept of
the value of the factor of safety (FoS) is carried out by analyzing a single parameter
of the material strength. The calculation of the probability of failure (PoF),
therefore, is proposed to be carried out for accommodating the uncertainty of
parameters in the physical and mechanical properties of the input material.
PT XYZ has designed the LOM slope for the open pit coal pit T and the slope
stability analysis will be carried out for assessing its stability. The method used for
analyzing the stability of highwall slopes is the Bishop boundary equilibrium
method. The input parameters of the material in the form of cohesion and internal
friction angle are obtained from the results of laboratory tests. As for determining
the PoF value, the existing data is then processed by descriptive statistical analysis
to obtain the mean value, standard deviation, and also finding the data distribution
type by applying the Kolmogorov-Smornov (KS) and Akaike Information Criterion
(AIC) method. Furthermore, the slope model for slope stability analysis is created
using software Rocsience Slide v6.0 which refer to the LOM design on the A-A'
and B-B' sections. During the analysis, ground water condition is simulated by
applying the hu values of 0.6, 0.8 and 1.
The results of the slope stability analysis on the A-A' and B-B' sections for each
design under various conditions are categorized in safe condition refering the
Decree of the Minister of Energy and Mineral Resources 1827K/30/MEM/2018 in
which the static FoS > 1.5; Dynamic FoS > 1.1; and PoF < 5%. Therefore, the
highwall slope does not require a recommendation for improving the slope
geometry. |
|---|