Optimum Calculation of Coal Pillars in Inclined Weathered Oxidation Zone

摘要

In the mining process of coal mine, waterproof coal pillars should be set between the weathered oxidation zone and the first mining face. In order to determine the reasonable upper limit of the first mining face of Hongyi Coal Mine, the waterproof coal pillar needs to be wide enough to resist the lateral hydrostatic pressure of the oxidation zone, and to ensure that the top plate aquifer does not run through the water guide crack zone, while also liberating as much stagnant coal as possible. In this paper, the first coal mine face’s waterproof coal pillar was calculated using conventional and optimized calculation methods, taking into account the dip angle of the coal seam, the height of the water-guide crack zone, and the rock shift influence zone, and finally the upper limit of the first face of Hongyi Coal Mine was determined.