A Discussion of Reinforcement Timing Optimization for Main Inclined Shaft Roadway with Water Seepage

Table 1

The physical parameters of the rock layers.

Rock layer	Thickness/m	Density/kg.m^3	Bulk Modulus/GPa	Shear Modulus/GPa	Tensile strength/MPa	Cohesion/MPa	Internal friction angle/°
Overlying rock	30	2300	2.65	1.47	3.81	4.69	32
Sandstone	4	2350	16.24	11.15	4.69	6.79	35
Mudstone	3.5	2150	2.32	1.09	1.81	2.19	30
Sandstone	2.5	2350	16.24	11.15	4.69	6.79	35
Mudstone	5	2150	2.32	1.09	1.81	2.19	30
Sandy mudstone	6.5	2300	2.66	1.46	2.11	2.49	33
Mudstone	13.5	2150	2.32	1.09	1.81	2.19	30
Siltstone	3	2450	15.72	9.81	3.62	5.91	33
Mudstone	2	2150	2.32	1.09	1.81	2.19	30
Underlying bed	30	2300	2.65	1.47	3.81	4.69	32