Novel Application of the Roof-Cutting-Type Gob-Side Entry Retaining in Coal Mine

Table 1

Main physical and mechanical parameters of the model.

Rock strata	Bulk modulus/10^9 Pa	Shear modulus/10^9 Pa	Friction(°)	Compressive strength/10^6 Pa	Density/10^3 kg/m^3	Cohesion/10^6 Pa
Limestone	16	17	36	5.9	2.5	5.6
Sandy mudstone	9	9	30	3.7	2.1	1.5
Mudstone	11	12	33	4.9	2.4	3.5
5# coal seam	1	2	30	0.6	1.4	1.1
Medium sandstone	13	15	38	4.9	2.4	5.4