SLOPE STABILITY ANALYSIS FOR PT ABC'S QUARTZ SAND MINE ULTIMATE PIT LIMIT, BANGKA BELITUNG
PT ABC is a tin mining company located in the Bangka Belitung Islands. In order to optimize resources, PT ABC is also planning to utilize the leftover processing materials, which have been traditionally backfilled, as backfill materials, namely quartz sand. This is done to increase added value in...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/76981 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PT ABC is a tin mining company located in the Bangka Belitung Islands. In order
to optimize resources, PT ABC is also planning to utilize the leftover processing
materials, which have been traditionally backfilled, as backfill materials, namely
quartz sand. This is done to increase added value in accordance with the
Regulation of the Minister of Energy and Mineral Resources (Permen ESDM)
Number 25 of 2018. Geotechnical parameters are crucial in supporting the quartz
sand mining operation, hence slope stability analysis is required to comply with
the Minister of Energy and Mineral Resources Decree Number
1827K/30/MEM/2018.
Slope stability analysis is conducted on the ultimate pit limit design using the
Bishop's Limit Equilibrium method and assuming circular failures using Slide 6.0
software. The geotechnical parameters for slope stability analysis are carried out
with a Hu value of 0.8 and seismic loading of 0.01g. The analysis results indicate
that all slopes in L, B, S, T, and M Blocks are considered safe as they meet the
minimum values for slope safety factor. The static safety factor (FK static) ranges
from 1.21 to 2.43, while the dynamic safety factor (FK dinamic) ranges from 1.17
to 2.3. The recommended single slope angle is derived from Hoek and Bray Chart
no. 4. Based on the conducted analysis, a recommended single slope for L, B, S,
T, and M Block is 5 m high, with a slope inclination between 35° - 60°.
The analysis shows that for every slope condition, the safety factor values have
met the requirements as stated in the Minister of Energy and Mineral Resources
Decree Number 1827K/30/MEM/2018. Therefore, PT ABC's quartz sand mine
located in the Bangka Belitung Islands can operate safely until the end of the life
of mine (LOM) based on geotechnical aspects. |
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