Fault Stability Analysis of Metal Mine Caving Area under In-situ Stress
A large number of caving areas will be formed when metal mines adopt caving method for a long period of time.Under the influence of long-term stress concentration,weathering and blasting vibra-tion,the stability of rock strata in the caving area will continue to decrease,and then deformation will occur until rupture and fault will be formed,which seriously affects the safety of mine production.In order to study the stability of fault and the variation law of related parameters in the caving area of metal mine under the ac-tion of ground stress,taking the deep mining of Shizishan Copper mine as the background,a large commer-cial finite element software LS-DYNA was used to calculate the fault displacement,effective stress and damage in the caving area under the action of ground stress.The results show that the fault displacement,ef-fective stress and damage degree increase with the increase of the depth of the fault,and decrease with the increase of the distance from the boundary of the caving area.Under the action of structural and gravity stress,the stress concentration at the fault will cause great damage to the weak surface structure,and the deeper the fault is,the great the potential risk.In order to improve the stability of stope structure,it is neces-sary to strengthen the monitoring of fault structure.The research results provide reference for predicting fault stability in caving area and mine safety production.
NETL
NSTL
万方数据
维普
