Simulation of the Working Performance of a Shearer Cutting Coal Rock

Table 3

Particle contact model parameters.

	Normal stiffness (N/m)	Tangential stiffness (N/m)	Normal stress (MPa)	Tangential stress (MPa)
Coal and coal	1.13 × 10^8	9.01 × 10^7	8.32	2.36
Rock and rock	1.98 × 10^8	1.59 × 10^8	26.4	13.30
Coal and rock	1.44 × 10^8	1.15 × 10^8	17.00	7.40