Abstract: Taking Yuwu Mining Company as the experimental mine, numerical simulation software and similar material simulation experiment is used to research "two zones" of overburden rock dynamic development features; and underground borehole television is taken to detect fractures development situations in Yuwu Mining Company deep full-mechanized caving face. The results show that the height of caving zone and the fractured zone is respectively about 33 m and 57 m around in Yuwu Mining Company deep full-mechanized caving face. With different advancing distance, the stress concentration coefficients of the same coal strata firstly increased and then stabilized in a fixed value. Abscission layer on both ends of the working face is big, but in the middle of abscission volume is small. Dynamic fracture development width is mainly less than 25 mm.