Study on the Bearing Mechanism and Stability of Surrounding Rock in Original Roadway Filling and Nonpillar Tunneling

Table 1

Mechanical parameters of coal rock involved in the simulation.

Rock	Rock thickness (m)	Elastic modulus (GPa)	Poisson’s ratio	Cohesion (MPa)	Internal friction angle (^o)	Tensile strength (MPa)	Density d (kg/m^3)
Mudstone	1.66	22.5	0.22	3.21	39	1.52	2660
B11a coal	1.07	5.13	0.33	1.15	33	0.14	1387
Sandy mudstone	2.7	5.45	0.147	2.16	36	1.3	2520
Sandstone	2.4	13.7	0.13	2.02	40	1.03	2497
Carbon mudstone	0.28	8.85	0.26	1.2	30	0.605	2461
B11 coal	0.75	4.91	0.34	1.35	33	0.132	1355
Sandstone	1.3	13.7	0.13	2.03	40	1.03	2497
Mudstone	5.95	16.8	0.22	2.22	33	1.51	2484
Siltstone	5.74	1.81	0.232	2.51	37	1.22	2465
Sandy mudstone	6.12	5.45	0.15	2.26	36	1.23	2533
B10 coal	1	5.5	0.24	1.52	33	1.23	1465
Mudstone	5.1	16.8	0.22	2.22	33	1.51	2484
Sandy mudstone	7.67	5.45	0.147	2.16	36	1.3	2520