Deformation and Failure Law of Roadway along Goaf and Reserve Width of Section Coal Pillar

Table 1

Physical and mechanical parameters of roof and floor of 9106 workface.

No.	Lithology	Thickness/m	Density/kg.m^-3	Bulk modulus/GPa	Shear modulus/GPa	Tensile strength/MPa	Cohesion/MPa	Internal friction angle/°
1	Overburden strata	59.0	2650	1.90	0.90	3.30	1.85	30
2	Sandstone	12.0	2650	4.0	1.20	1.80	1.17	28
3	K4 fine sandstone	2.0	2650	16.9	6.00	1.80	2.46	35
4	Fine sandstone	4.0	2650	9.0	3.20	1.80	2.87	32
5	Mudstone	8.0	2650	1.50	0.50	1.30	1.55	30
6	K3 limestone	4.0	2650	16.9	6.00	1.80	2.46	35
7	Mudstone	4.0	2650	1.50	0.50	1.30	1.55	30
8	K2 limestone	15.0	2650	16.9	6.00	1.80	2.46	35
9	Coal seam	5.0	1400	2.40	1.07	0.60	1.26	27
10	Mudstone	8.0	2650	1.50	0.50	1.30	1.55	30
11	Aluminum mudstone	4.0	2650	2.25	1.40	1.60	1.42	30
12	K1 fine sandstone	4.0	2650	9.00	3.20	1.80	2.87	32
13	Fine sandstone	4.0	2650	9.00	3.20	1.80	2.87	32
14	Mudstone	6.0	2650	1.50	0.50	1.30	1.55	30
15	Limestone	8.0	2650	9.00	3.20	1.80	2.87	32
16	Underlying strata	50.0	2650	29.3	12.4	3.30	4.20	42