Research on the Deformation Mechanism and Directional Blasting Roof Cutting Control Measures of a Deep Buried High-Stress Roadway

Table 4

Modeling parameters of rock.

Lithology	Density (kg/m^3)	Bulk modulus (GPa)	Tensile strength (MPa)	Cohesion (MPa)	Internal friction angle (°)
Fine-grained sandstone	2560	18	3.37	1.04	37.49
Medium conglomerate	2340	15	7.10	1.06	30.95
Fine-grained sandstone	2200	13	1.06	1.84	32.14
Siltstone 1	2560	20	2.32	1.59	37.03
Sandy mudstone 1	2340	13.5	1.32	2.30	30.61
Coal	2200	23	1.06	2.84	32.14
Sandy mudstone 2	2340	14	7.10	2.36	30.95
Siltstone 2	2610	14.7	1.68	2.50	37.28