Distribution of Side Abutment Stress in Roadway Subjected to Dynamic Pressure and Its Engineering Application

Table 2

Physical and mechanical properties of various strata.

Stratum name	Rock type	Thickness/m	Bulk modulus/GPa	Shear modulus/GPa	Density/kg·m^−3	Friction angle/°	Cohesion/MPa	Tensile strength/MPa
Overlying strata	Siltstone	16.5	8.4	4.8	2450	32	5.6	3.6
Main roof	Fine sandstone	10	10	5.8	2580	38	7.8	4.5
Immediate roof	Mudstone	5.5	3.2	2.5	2460	32	2.6	2.8
Coal seam	Coal	3.5	2.3	1.2	1340	24	1.6	2
Immediate floor	Mudstone	4.5	2.8	1.5	2480	28	3.5	4.2
Main floor	Fine sandstone	10	5.2	2.3	2520	28	9.6	3.8
Underlying strata	Mudstone	20	4.7	2.7	2500	30	7.5	1.6