Fig. 6

Peeping view of mine borehole. Drill hole peeping is able to show the lithological characteristics and dynamic damage characteristics of coal seams more intuitively. The top plate breakage mainly occurs in 0~3m, the top plate is more obvious in the range of 3~6m, and the top plate above 6m is relatively intact. The roadway as a whole shows asymmetric deformation and damage, and the deformation and damage trend of the right side of the roadway is larger than that of the left side.