Evaluation of rock slope using q-slope, limit equilibrium and failure probability at andesite mine of Sidomulyo Village

For an open pit mine, the rock slope stability is one of major significant challenges at every stage in operation. It became a concern from planning until mining closure. Mining activities research location have entered closure phase and produced final that consists 4 single slopes with overall height 65m angle 62° its not yet known. The actual has discontinuities which affect potential for failure. Most methods used geotechnical practice estimating are based on traditional limit equilibrium methods. On other side, very few empirical techniques exist to assess stability. method Q-Slope relatively new methodology assessing terrains built masses. This was developed over last decade by Barton Bar (2015), modifications original Q-System application through parameter RQD, Jn, Jr, Ja, O-Factor, Jwice, SRFa, SRFb SRFc. analysis resulted stable condition because value βQ-Slope > βSlope. factor safety probability failure geometry known it fulfils acceptance criteria FoS ≥ 1.1 PoF ≤ 37,5% according regulation Ministry Energy Mineral Resources Decree 1827/K/30/MEM/2018.