山东横河煤矿分层开采防水煤柱留设

THE ESTABLISHMENT OF WATER-PREVENTING COAL PILLARS OF SLICE MINING IN HENGHE COAL MINE, SHANDONG PROVINCE

防水煤（岩）柱的留设是保证水体下采煤安全的有效措施之一，其高度取决于覆岩破坏带的高度及上覆岩上层的水文地质条件，本文在详细分析了横河煤矿水文地质条件和工程地质条件的基础上，建立计算机模型预测了该矿３号煤开采后覆岩破坏带高度，进而确定了松散含水层下开采防水煤岩柱的高度，开采结果已初步证明了其正确性。

The establishment of water-preventing coal/rock pillars is one of the most effective methods to keep mining safety under water body and its height depends on the height of fractured zone due to mining and the hydrogeological conditions of overburden soils and rocks. In this paper, on the basis of the analysis of hydrogeological and engineering geological conditions in Henghe Coal Mine, the calculation model was set up to predict the height of fractured zone due to slice mining of coal seam No. 3. Then, the height of waterpreventing coal/rock pillars under unconsolidated aquifers was determined and the result has been proved preliminarily by the mining practice.