Research Article

Distribution of Side Abutment Stress in Roadway Subjected to Dynamic Pressure and Its Engineering Application

Table 3

Mechanical parameters for the coal of different category.

CategoryBulk modulus/GPaShear modulus/GPaFriction angle/°Cohesion/MPaTensile strength/MPa

Soft coal1.40.8221.21.6
Medium hard coal2.31.2241.62
Hard coal4.82.5324.63.2