急斜煤?走向?壁?采面?板控制

Aiming at the mining conditions for fully mechanized caving in long-wall working face of steep inclined coal seam in Lushuidong mine, we performed the numerical simulation with 3-D finite difference method based on the observed support resistance. The result shows that the roof pressure of working face has the maximum value on the top, the smallest value in the middle area, and a moderate value in lower area. When the roof is in its normal state, it has an average pressure of 0.26 MPa; during its weighting period, the average weighting strength is 0.43 MPa, with the pace of the pressure appearance being 15.8 m. The maximum resistance which the brackets can bear is 3250 kN, accounting for 82.1% of the maximum value designed.