TY - CPAPER T1 - Development of a mine dewatering and pit slope depressurisation review process T2 - Slope Stability 2020: 2020 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering AU - Reano, E AU - Beale, G AU - Dowling, J AU - Tejada, LC AU - Lacey, M AU - Hazwezwe, H ED - Dight, PM A2 - Dight, PM DA - 2020/05/12 PY - 2020 PB - Australian Centre for Geomechanics PP - Perth CY - Perth C1 - Perth SP - 1253 EP - 1266 AB - Most major open pit mines eventually require some form of active depressurisation in order to support geomechanical performance. Often, the overall or inter-ramp factor or safety will only remain within acceptable bounds if specific groundwater levels and pore pressures are achieved during mine plan implementation. In an active mine, there is almost always risk that actual groundwater pressure conditions will not comply with the slope design requirements, which elevates the risk of slope instability. This paper reviews some of the main factors that can cause pit slope pore pressures to deviate from design and offers a framework for evaluation and management of risk in-pit-slope depressurisation programs along with practical examples. KW - instability slope KW - groundwater pore pressures KW - review matrix UR - https://papers.acg.uwa.edu.au/p/2025_85_Reano/ ER - DO - 10.36487/ACG_repo/2025_85