Theoretical analysis, numerical simulation, and borehole drilling were used to study the mechanism of four large-scale water inrush events that occurred during the mining of the 1121 working face in the Hongliu coal mine in the Ningdong mine area. We concluded that the working face inrush was induced by water in the bed separations formed by overlying strata movement caused by the mining process. To control such inrushes, the location, size, and hydrogeological properties of the 18 m thick key aquiclude were investigated. We determined that the best time to drain the bed separation water was between when the beds separated and the roof caved, before water inrush occurred. The best place to drain water from was directly above the key aquiclude. These results should be useful for other sites with similar mine conditions.

通过理论分析，数值模拟和钻孔研究，研究了宁东矿区红柳煤矿1121工作面开采期间发生的四次大规模突水事件的发生机理。我们得出的结论是，工作面涌入是由采矿过程引起的上覆地层运动形成的床层分隔中的水引起的。为了控制此类涌入，研究了18 m厚关键含水层的位置，大小和水文地质特性。我们确定，排干分离水的最佳时间是在分离床和顶板塌陷之间，在涌水发生之前。排干水的最佳地点是关键含水层的正上方。这些结果对于具有相似矿山条件的其他地点应该是有用的。