煤层群下煤层开采对上覆采空区积水影响程度研究

Research on Influence Degree of Mining Lower Coal Seam in Coal Seam Group on Water Accumulation in Overlying Goaf

为研究下煤层开采对上覆采空区积水影响,以凌志达矿煤层群为研究对象,采用数据统计、公式优化等方法,拟合出煤层群开采底板破坏深度公式,分析了采空区积水分布规律,探索了下煤层开采对上覆采空区积水的影响,制定了影响程度判定标准,并将下煤层开采对上煤层采空区积水影响程度划分为危险区、影响区与安全区。分区判定划分结果表征了研究区煤层开采对上层采空区的影响程度,可量化上层采空区水位分布、突水风险的影响和扰动程度,对煤层群开采突水防治具有重要意义。

In order to study the influence of lower coal seam mining on water accumulation in the overlying goaf,the Lingzhida coal seam group was taken as the research object.Data statistics,formula optimization,and other methods were used to fit the formula for the failure depth of the coal seam group′s mining floor.The distribution law of water accumulation in the goaf was analyzed,and the influence of lower coal seam mining on water accumulation in the overlying goaf was explored.Criteria for determining the degree of influence were established,and the water accumulation of the influence with mining the lower coal seam in the goaf of the upper coal seam is divided into danger zone,influence zone,and safety zone.The zoning determination and division results represent the degree of influence of coal seam mining on the upper goaf in the research area,which can quantify the distribution of water level in the upper goaf,the influence of water inrush risk,and the degree of disturbance.It is of great significance for the prevention and control of water inrush in coal seam group mining.