Study on Fault Slip Law and Instability Risk Sensitivity Induced by Mining in Metal Mines
The faults are prone to slip failure under the mining action in metal mines,posing a severe threat to safe mining activities.Based on FLAC3D numerical simulation,the influencing factors of fault slip failure induced by mining in metal mines were studied.The results show that the shear displacement and shear stress on the fault plane have obvious spatiality.Based on the risk index of fault slip,the different risk ranges of fault slip can be quantitatively evaluated.The increase of the number and intensity of blasting disturbance and the decrease of frequency make the risk range of fault slip increase continuously,and the possibility of danger is greater.The significance of mining factors influencing on the high risk range of fault slip from low to high is:dip angle,disturbance times,disturbance intensity,internal friction angle,disturbance frequency and ore body thickness.Among them,the ore body thickness and the frequency of blasting disturbance are the main factors affecting the degree of fault instability in the mining process.The study can provide a theoretical and technical support for fault safety prevention and control under the action of metal mining.
Metal mineMining actionFault slipNumerical simulationInfluencing factors
万方数据
维普
