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针对含水松散层下厚煤层采掘溃砂工程难点,对含水松散层的岩性、厚度和富水性等水文地质条件进行研究,探讨了厚煤层分层开采留设安全煤岩柱合理尺寸,并确定了相应的开采方法;预计了(垮落带和导水裂隙带)“两带”高度,基于GIS的强大数据处理功能,对多因素引起的采动溃砂危险性进行了量化评价,分析得出了分层开采条件下顶板溃砂危险性分区图。
In view of the difficulty of extra-thick coal seam mining in the coal seam with loose water, the hydrogeological conditions such as lithology, thickness and water-rich of the loose layer in water are studied. The rational size of the safety coal and rock pillar in stratified mining of thick coal seam is discussed. The corresponding mining methods are forecasted; the powerful data processing functions based on GIS (caving zone and water conducting fracture zone), “two belts” height are predicted, and the risk of mining sand failure caused by multiple factors is quantitatively evaluated, Analyzed the layered roof mining danger map.