煤层露头区域薄基岩工作面顶板水害治理方案

Water Damage Control Scheme for Roof of Thin Bedrock Working Face in Coal Outcrop Area

基于对煤层露头薄基岩区域水文地质条件与上覆含水层、隔水层物理力学性质分析基础上,确定该区域煤层顶板含水层富水性的判据。以河南能源集团赵固二矿煤层露头区域薄基岩工作面为背景,通过针对煤层顶板含水层不同的富水性合理留设防隔水煤(岩)柱,并与施工井下顶板探放水钻孔相结合的治理方案,综合治理矿井顶板水害。结果表明,该方案成功治理露头薄基岩区域顶板水害,消除矿井溃水溃砂威胁。

Based on the analysis of hydrogeological condition and the physical and mechanical properties of upper aquifers and aquicludes in thin bedrock of the coal outcrop area, we determine the criterion of water abundance of upper aquifers. Taking the thin bedrock working faces of Zhaogu No.2 Coal Mine of Henan Energy and Chemical Industry Group as the research backgound,this treatment scheme is conducted by setting proper coal（rock）pillar for different water abundance of coal seam roof and constructing underground roof exploring and dewatering water drillings to comprehensively control mine roof water damage. The results show that the scheme can successfully control the roof water damage in the exposed thin bedrock area and eliminate the threat of water and sand bursting in the mine.