Analysis of Dynamic Response Mechanism of Roadway Bolt

Table 1

Physical and mechanical parameters of coal measure rock strata.

Rock	Density (kg·m^−3)	Elasticity modulus (GPa)	Shear elasticity (GPa)	Tensile strength (GPa)	Poisson’s ratio	Cohesion (GPa)	Internal friction angle (°)
Sandstone	2550	8.17	3.8	2.93	0.23	1.63	42
Mudstone	2600	5.00	0.7	2.10	0.30	1.35	36
Coal	1475	5.12	0.9	0.69	0.25	1.08	28
Packsand	2650	13.36	7.6	3.28	0.24	1.76	46