Influencing factors accounting for slope stability of mine waste rock stockpile
The great potential safety concerns in the mine waste rock stockpile requires reasonable design and timely stability evaluation.The parametric analysis on the stability of waste rock stockpile based on numerical simulations was carried out.Four methods,including simplified Bishop method,MP method(Morgenstern-Price method),finite element stress method and optimized finite element stress method,were used to identify relevant factors that accounted for slope stability of stockpile,which included the apparent cohesion,stockpile shape design,waste rock properties and matrix suction.The results show that the factor of safety(Fs)is positively correlated with the internal friction angle and apparent cohesion,but negatively related with the height of the waste rock stockpile.The compacted waste rock layer will slightly increase Fs of the slope.However,it should be noted that under the condition of real and variable internal friction angle,the Fs will decrease with the increase of depth,which should be considered in the slope design.The simulation result considered the effects of various factors on the stability of waste rock stockpile,which is of guiding significance for the slope design of the stockpile.
numerical simulationwaste rock stockpileslope designstability analysislimit equilibrium method
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