Research Article

Simulation Study of the Roof Fracture Pattern of a Horizontal Sublevel Caving in a Steeply Inclined Thick Coal Seam

Table 1

Physical and mechanical parameters of coal and rock mass.

RockBody force γ (kN/m3)Elasticity modulus E (GPa)Poisson’s ratio vTensile strength (MPa)Cohesion (MPa)Internal friction angle (°)

Fine sandstone28.733.40.2351.293.242
Mudstone24.817.70.2040.581.233
Coal13.35.30.320.151.2532
Mudstone24.817.70.2040.581.233
Siltstone24.619.50.21.842.7538