Deformation Caused by Dynamic Load and Support Requirements in a Deep Gob-Side Entry Rock Mass

Table 1

Lithologies and petrophysical parameters of the roof and floor.

Lithology	ρ (kg/m^3)	K (MPa)	G (MPa)	C (MPa)	Rm (MPa)	φ (°)
Fine sandstone	2460	7500	8300	4.25	4.84	29
Mudstone	2000	5400	3900	3.56	3.05	24
Coal seam	1500	620	820	0.63	0.3	31
Al mudstone	2000	3000	3900	3.56	3.05	24
Mudstone	2400	8700	9030	6.65	4.53	30

ρ is density, K is bulk modulus, G is shear modulus, C is cohesion, Rm is tensile strength, and φ is friction angle.