Numerical Simulation of Dynamic Response Characteristics of Cutting Coal and Rock by a Roller Coal Cutter

Table 1

Physical and mechanical parameters of coal and rock.

Rock types	Density ρ (kg·m^−3)	Elasticity modulus E (GPa)	Poisson’s ratio ν	Uniaxial compressive strength (MPa)	Strength of extension (MPa)
Coal	1574	4.29	0.35	13.5	0.73
Mudstone	2612	12	0.25	37.7	3.07
Sandstone	2751	30	0.26	89.1	10.61