Study on the Dynamic Instability Mechanism of the Rock Formation in the Multifault Structure Zone of the Stope

Table 1

Rock mechanical parameters of each rock layer.

Rock name	Thickness (m)	Bulk (GPa)	Shear (GPa)	(MPa)	Coh. (MPa)	Fric. (°)	Density (kN/m^3)
Siltstone	47	9.94	6.5	2.3	3.2	35	2460
No. 9 coal	1.5	3.22	1.0	0.23	0.6	22	1620
Fine sandstone	2	9.82	6.7	2.5	1.6	32	2660
Siltstone	2	9.94	6.5	2.4	3.2	30	2460
No. 10 coal	0.8	3.22	1.0	0.23	0.6	22	1620
Mudstone	1.5	3.68	3.1	1.8	0.56	20	0.23
Siltstone	4.5	9.94	6.5	2.4	3.2	30	2460
Fine sandstone	22	10.6	9.1	2.0	2.2	32	2200
No. 12 coal	2	4.36	1.2	0.2	0.6	22	1620
Silty mudstone	8	8.16	5.8	1.7	0.7	26	1980
No. 13-1 coal	2	3.22	1.0	0.23	0.6	25	1620
Silty mudstone	5	8.16	5.8	1.7	0.7	26	1980
Fine sandstone	4	10.6	9.1	2.0	2.2	32	2200
No. 13-2 coal	2	3.22	1.0	0.23	0.6	22	1620
Sandy mudstone	5	8.16	5.8	1.7	0.7	26	1980
Siltstone	49	9.94	6.5	2.4	3.2	35	2460