Mine water risk in open pit slope stability

Water pressure due to groundwater presence has a great influence on the open pit slope stability and for that reason the risk of slope instability is dependent on water level in the slope. Factor of safety could be reduced from 1,3 to 1.0 if the water level increases. In all cases in open pit mining practice more than 40% of slope instability risks depend on groundwater conditions in the slope, To prevent slope failure, effective drainage system can be installed, and other factors can remain unchanged. The importance of controlling water surface in open pit slope is emphasized. In general, increasing the open pit slope angle and decreasing the failure risks, is directly proportional to effective drainage system.