针对巨厚煤层在综放开采条件下的顶板离层水涌突水实例,分析离层水形成的基本条件,并对研究区可能产生离层的位置进行判别计算。重点介绍不同于我国中东部矿区的离层水防治措施,设计的地面直通式导流孔可以对离层积水进行有效疏放,并研究采高和离层水突水的关系以及工作面推进速度与离层空间积水量的关联性。研究对离层水形成条件的分析和针对西部特殊地层进行的离层水防治水设计为具有相似开采条件的矿井进行离层水害防治提供重要参考。
A water inrush case upon roof bed separation of the ultra thick coal seam during the full-mechanized caving mining was analyzed. The types of water inrush in bed separation were summarized and the mechanism of formation of the hydrostatic water inrush in roof bed separation of a mining face was discussed. The possible separation locations in the studied area were calculated. The method of prevention of water inrush from roof bed separation was introduced in detail. Proposed drill holes penetrating through up to ground surface drained the water in the separation effectively. The relationships between the mining height and the water inrush from the separation, and the relevance of the mining rate and the water yield in the separation were studied.