Study on Impact Tendency of Coal and Rock Mass Based on Different Stress Paths

Table 4

Tensile strength test of coal seam and roof rock samples.

Rock stratum	Serial number						Average tensile strength (MPa)
	1	2	3	4	5	6
S1: argillaceous sandstone	3.16	3.12	3.35	2.79	3.38	3.11	3.15
S2: coal	1.21	1.53	1.38	1.66	1.82	1.76	1.56
S3: silty sandstone	3.67	3.10	4.06	3.56	3.46	3.22	3.51