Roof Failure Mechanism of Thin Bedrock Working Faces under Loading and Analysis Based on Microseismic Monitoring Technology

Table 1

Statistical table of data related to the transfer coefficient of the loose layer in the working face.

Working face	Thickness of bedrock	Mining height	First weighting distance (m)	Periodic weighting distance (m)	Maximum resistance (kN)	Mining height (m)	Thickness of loose layer (m)	Transfer coefficient
Longdong Coal Mine 7130 working face	41.34	2.4	22	12	3840	270	228.66	0.017
Longdong Coal Mine 7128 working face	27.83	2.4	25	15	4120	230	202.17	0.073
Zhuxianzhuang Coal Mine 870 working face	15.9	2.2	28	10	2800	280	264.1	0.083
Zhaoguyi Coal Mine 11071 working face	40.1	3.5	18.9	9.5	7980	510	465.7	0.05