SLOPE STABILITY ANALYSIS OF HIGHWALL OF 10BC3 PIT PT. ARUTMIN INDONESIA JOBSITE KINTAP, SOUTH KALIMANTAN
PT. Arutmin Indonesia is a coal mining company that carries out their operation in South Kalimantan area using the open pit method. Kintap site is developing pit 10 by making a boxcut due to the discovery of an economic seam under the target seam of previous pit. As consequence, a highwall of pit...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/54394 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PT. Arutmin Indonesia is a coal mining company that carries out their operation in
South Kalimantan area using the open pit method. Kintap site is developing pit 10
by making a boxcut due to the discovery of an economic seam under the target seam
of previous pit. As consequence, a highwall of pit 10BC3 is developed under the
IPDC dump and pit 10’s sump. Therefore, a recommendation related to the
geometry of pit 10BC3 highwall that comply with government safety standards is
required.
Slope stability analysis is conducted using Slide 6.0 software, the probability of
failure and safety factor of the slope are calculated using the Monte-Carlo and
Bishop Simplified methods. The distribution of the data used are determined by
applying goodness of fit test such as the Kolmogorov-Smirnov and Akaike
Information Criterion methods.
The results of analysis show that the existing slope is considered safe because FoS
deterministic = 1.610, FoS mean = 1.761 and PoF = 2.2%, however, the given
slope geometry recommendation is considered unsafe because the PoF = 7.7%
which exceeds the maximum limit of 5 %. In order to make a stable and safe
highwall during coal getting operation, some safety precautions must be carried
out which are draining the highwall sump and creating a slope-counterweight after
coal getting. |
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