Rock Mechanics Characteristics Test and Optimization of High-Efficiency Mining in Dajishan Tungsten Mine

Table 5

Model mechanical parameters.

Rock classification	Tensile strength (MPa)	Bulk density	Elastic modulus (GPa)	Poisson’s ratio	Internal friction angle	Cohesion force (MPa)
Surrounding rock	2.4	2.75	17.6	0.22	19.58	4.6
Ore rock	1.36	2.77	6.36	0.23	7.66	10.29