Analysis of the Coal Fluidization Mining Process with the Continuous-Discontinuous Coupled Particle-Block Method

Table 1

Rock material parameters.

Lithology	Roof depths m	Bulk modulus (GPa)	Shear modulus (GPa)	Density (kg/m^3)	Cohesion (MPa)	Tensile strength (MPa)	Friction angle (°)
Medium sandstone	730	3.31	1.71	2650	18.5	11.2	41
Sandy mudstone	737.4	1.6	0.9	2610	9.5	7.5	36
Medium sandstone	739.4	3.31	1.7	2650	18.5	11.2	41
Mudstone	740.7	1.82	0.91	2630	9	4.4	38
No. 5 coal	742.9	1.14	0.45	1340	3	12	26
Siltstone	744.3	4.35	2	2710	13	10	44
Fine sandstone	749.5	3.31	1.71	2700	18.5	12	41
Mudstone	754.5	1.82	0.91	2620	9	10	38
Siltstone	756.9	3.69	1.61	2650	18	12.5	45
Sandy mudstone	763.2	1.87	0.87	2300	12	11	36
No. 8 coal	766.2	0.73	0.3	1310	2.8	1	28
Mudstone	769.8	0.94	0.36	2300	4	3	36
Siltstone	779.8	3.5	1.53	2650	18	12.5	45
Mudstone	783.2	0.94	0.36	2300	4	3	36
No. 9 coal	785.8	1.14	0.45	1310	2.8	1.4	28
Sandy mudstone	787.3	1.87	0.87	2300	12	11	36
Mudstone	791.8	0.94	0.36	2300	3	3	36
Siltstone	811	2.955	2.18	2650	18	12.5	45