陕北浅埋煤层采空区积水下安全开采技术研究

浅埋煤层上覆采空区水威胁着陕北地区诸多煤矿的安全生产。以陕北地区某煤矿为例,针对该类水害问题进行分析,通过经验公式、数值模拟等方法计算,开采3-1号煤层产生的覆岩导水裂缝带高度至少为66 m,运用类比法及经验公式预计,矿井正常涌水量为163 m3/h,最大涌水量203 m3/h,3-1号煤层上覆采空区积水量约为2.6×106 m3。根据各计算结果,提出"物探先行、钻探验排、先治后采、有掘必探"的安全开采技术方案和思路,为矿井后期制定合理有效的煤层顶板采空区水综合防治措施打好基础。 

Research on safe mining technology for shallow buried coal seam under the goaf water in northern Shaanxi Province

Goaf water above shallow coal seams is threatening the safe production in many coal mines in north Shaanxi Province. The paper, taking a mine in north Shaanxi Province as an example, aiming at such kind of water hazards, through using empirical formula, numerical simulation,conducted analysis, calculated that the water-conducting height in the overlying rock due to mining seam 3-1 was at least 66 m. Using analogy method and empirical formula, it was predicted that the normal mine inflow was 163 m3/h, the maximum mine inflow 203 m3/h, the accumulated goaf water above seam 3-1 about 2.6×106 m3. According to the calculation results, the technical scheme and idea for safe mining were put forward, that is, geophysical prospecting goes first, drilling verifies the drainage, control is followed by mining, detection must be carried out before any excavation, laying the foundation for formulating effective and reasonable comprehensive control measures of goal water in the roof of seam.