Proceedings of the 2nd International Conference on Industrial and Technology and Information Design, ICITID 2021, 30 August 2021, Yogyakarta, Indonesia

Research Article

Failure Probability of Mining Slope Recommendation at Asphalt Mine, Buton, South East Sulawesi

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  • @INPROCEEDINGS{10.4108/eai.30-8-2021.2311503,
        author={Bayurohman Pangacella Putra and Novandri Kusuma Wardhana},
        title={Failure Probability of Mining Slope Recommendation at Asphalt Mine, Buton, South East Sulawesi},
        proceedings={Proceedings of the 2nd International Conference on Industrial and Technology and Information Design, ICITID 2021, 30 August 2021, Yogyakarta, Indonesia},
        publisher={EAI},
        proceedings_a={ICITID},
        year={2021},
        month={10},
        keywords={mining slope asphalt mine},
        doi={10.4108/eai.30-8-2021.2311503}
    }
    
  • Bayurohman Pangacella Putra
    Novandri Kusuma Wardhana
    Year: 2021
    Failure Probability of Mining Slope Recommendation at Asphalt Mine, Buton, South East Sulawesi
    ICITID
    EAI
    DOI: 10.4108/eai.30-8-2021.2311503
Bayurohman Pangacella Putra1,*, Novandri Kusuma Wardhana1
  • 1: Institut Teknologi Nasional Yogyakarta, Caturtunggal, Depok, Sleman, D.I.Yogyakarta, Indonesia
*Contact email: Bayurohmanputra@gmail.com

Abstract

Ministerial Decree No 1827 K/30/MEM/208 states that mine geotechnics should inclose mining slope’s probability of failure (PoF) value, beside safety factor (SF), to express a degree stability. PoF tolerances are associated with the risk of consequence when the slope failures. This regulation conforms with geological uncertainty commonly encountered at asphalt mining industry. Overall asphalt mining highwall that is constituted by layers of sedimentary rocks subject to variation of its geotechnical parameters value. Required rock characteristics of Mohr-Coulomb’s failure Criteria, i.e. cohesion and internal friction angle were statistically analysis to map their probability distributions. Numerical analysis is then carried out to determine slope’s PoF for several slope dips and then followed with correlation and regression analysis. Correlation analysis indicates that PoF value rises as the slope dips steeper. Regression analysis results that overall slope dip recommendations are 48°, 55°, and 62.5° for high, moderate, and low failure consequence respectively. Considering mineable reserve conservation, steeper slope would not be recommended.