Mining-induced Stress Evolution and Roof Stability of Large Mining Height Working Face Passing Through Fault

Numerical simulation was used to study the stress evolution of surrounding rock when large mining height working face passed through a fault, and the stress around the fault and the abutment pressure with the advancing of working face were analyzed; structural characteristics of roof of large mining height working face during passing through a fault were compared to that of normal mining height working face and non-fault large mining height working face. The stability of roof was analyzed when working face passed though a fault, and the possible failure types were pointed out. Grouting measures to improve the stability of the roof were proposed, and the field application shows that the coal pillar has good stability during passing through the fault, and the roof is stability. There is no abnormal load and damage on supports, and the roof can be controlled well.