Abstract：In order to grasp the goaf floor failure condition after the inclined coal seam mining，the stress solving mechanics mode of the inclined coal goaf floor was set up based on the fracture mechanics theories.Combined the stress field and twin shear strength theory ，the floor failure depth solving equation was derived and the equation rationality was verified through examples.According to the solving equation，the failure modes and influencing factors of the goaf floor were analyzed. The findings include： the distribution of the coal-mining failure zone of the inclined coal seam had asymmetry characteristic. The failure range and depth of the floor were mainly affected by the occurrence state of the working face and the lithology of the floor.The failure depth was positively correlated with the working face inclined length、mining depth and internal friction angle of the floor，and inversely proportional to the cohesion of the floor.With the increase of inclination Angle，the failure depth tended to rise first and then fall，but with the increase of lateral pressure，the failure depth tended to fall first and then rise.These findings can provide some theoretical directions for controlling confined water and properly designing floor roadway position.
题正义,李佳臻,王 猛,朱志洁,张 峰,胡江涛. 基于断裂力学倾斜煤层底板采动破坏深度研究[J]. 华中师范大学学报(自然科学版), 2020, 54(5): 787-791.
TI Zhengyi,LI Jiazhen,WANG Meng,ZHU Zhijie,ZHANG Feng,HU Jiangtao. Study on coal-mining failure depth of the inclined coal seam floor based on fracture mechanics. journal1, 2020, 54(5): 787-791.
2020, Vol. 54 
