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根据王坡煤矿工作面赋存情况,将工作面突水类型划分为煤层方向突水和底板方向突水两类,应用弹塑性极限平衡理论结合莫尔-库伦屈服准则得到倾斜条件下工作面上侧、下侧防水煤柱的计算公式,经计算并分析比较,防水煤柱留设宽度为17.4 m,考虑采动过程中底板压力变化造成底板破坏深度的增加,实际留设防水煤柱宽度20 m。该研究为倾斜煤层巷道防水煤柱的合理留设提供了依据,为倾斜煤层的安全高效开采提供有益借鉴。
According to the occurrence of the working face of Wangpo coal mine, the water inrush types of work face are divided into two types: water inrush in the direction of coal seam and inrush in the direction of the floor. The working surface under inclined conditions is obtained by using elastic-plastic limit equilibrium theory combined with Mohr-Coulomb yield criterion After calculation and analysis, the reserved width of waterproof coal pillar is 17.4 m. Considering the change of floor pressure during the mining process, the depth of floor destruction increases, and the actual width of waterproof coal pillar is 20 m. This study provides the basis for the reasonable retention of water-proof coal pillar in inclined coal seam roadway, and provides a useful reference for the safe and efficient mining of inclined coal seam.