Analysis of open slope mine stability at the sidewall coal mine field block 12-13, pit A-B, Sangasanga district, Kutai Kartanegara Regency, East Kalimantan Province

Coal mining at Sangasanga District, Kutai Kartanegara Regency, East Kalimantan Province, Indonesia, is run by the open-pit mining method, namely the excavation and backfilling activities carried out downward to form a pit. It resulted in leaking on one of the slopes. Therefore, this study aims to de...

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Bibliographic Details
Main Authors: Hidajat, Wahju Krisna, Santi, Narulita, Girsang, Esa Mawartika
Format: Conference Proceeding
Language:English
Subjects:
Classification
Coal mines
Coal mining
Landslides
Landslides & mudslides
Open pit mining
Rock mass rating
Safety factors
Sandstone
Slope stability
Stability analysis
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Summary:Coal mining at Sangasanga District, Kutai Kartanegara Regency, East Kalimantan Province, Indonesia, is run by the open-pit mining method, namely the excavation and backfilling activities carried out downward to form a pit. It resulted in leaking on one of the slopes. Therefore, this study aims to determine whether the slope can cause landslides or not by getting the value of the safety factor from Sidewall Block 12-13, Pit A-B, Sangasanga District, Kutai Kartanegara Regency, East Kalimantan Province. The research applied descriptive and quantitative methods to obtain Rock Mass Rating (RMR) classification, Geological Strength Index (GSI) classification, and safety factor values. The location is part of the Balikpapan Formation, composed of claystone, sandstone, and coal. RQD value of 99.5 and RMR of 73.63 are classified as good rock mass with a GSI value of 68. Then, the slope stability using the Rocscience Slide V6.009 software and the safety factor value obtained with Generalized Hoek-Brown rock strength is 2,416 (Bishop) and 2,153 (Janbu). In conclusion, the safety factor stated that it is safe from landslides.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0140438