Study On The Deformation And Failure Of Mining Slope Under The Control Of Fault

The deformation and destruction of slope can easily cause geological disasters such as landslides, avalanches, or slope debris, and these accidents greatly affect the property of the people around. Slope deformation and destruction are usually controlled by many factors, such as landform, stratum lithology, fault structure, and underground mining.In this paper,mining slope under the control of the fault is the object of study,by using numerical simulation for the model of the slope with fault and without fault to analysis the characteristics of the deformation and failure mining slope. Finally combining the actual geological environment and underground mining conditions, analysis the deformation of mining slope caused by fault. The results of the numerical simulation showed that:(1) Coal mining causes stress concentrated around the goaf, deformation of slope body. And fault accelerated the deformation and failure of slope, resulting in a further reduction of slope stability. By the results of simulation, the goaf located in the footwall has a great impact on slope stability. The greater dip angle(30°,45°,60°and 75°)of the fault, the lower stability of the slope. The increasing distance(20m,40 m,60m and 80m) between the fault and the goaf, the effect function of the fault on the slope weakened gradually,when the distance reached 80 m, the effect almost disappear.(3) Through numerical simulation of mining slope and then analysing we can obtain that,the hanging wall of the fault cause the surface of slope to produce negative vertical displacement, slope rock mass by squeezing the footwall, towards the free surface displacement. And Fengmaoding actual survey of the top surface subsidence, at the foot of the mountain side of the road on both sides of the pressure of ground fissures and land uplift deformation phenomena are basically consistent, indicating that the numerical simulation is highly reliable.