Mechanism of Abnormal Surface Subsidence Induced by Fault Instability

Surface movement and deformation with fault differ significantly from that without fault. To explore the mechanism of abnormal surface subsidence induced by instability, mechanical model for slip soil cantilever were separately established when mining in hanging wall footwall. Moreover, based on numerical similarity simulation experiment, difficulty instability was compared analysed. The results show at outcrop is caused fracture mass due to effect more likely experience stepped Fault stability worsens growth dip angle wall, it’s certainly subjected lower than internal friction strengthens increasing during At same time, ratio shear stress normal about five times undergo As a natural weak plane, exerts blocking transfer mining-induced overburden movements.