复杂水文地质条件下回采工作面涌水分析与水害预测研究

Study on Water Inrush Analysis and Water Hazard Prediction of Working Face under Complicated Hydrogeological Conditions

五家沟矿5105工作面属于典型的地表沟流下的浅埋综采放顶煤工作面开采,该区内地下及地表水资源比较丰富,且大部分都覆盖在煤层上覆的岩层中,矿井内部地表径流、顶板与采空区积水随时会给工作面的安全开采带来一定的威胁。通过COMSOL Multiphysics数值模拟方法对采场上裂隙带的导水特性进行模拟分析,确定了大沙沟河流和宽导水裂隙带很有可能威胁到工作面的安全生产,所以有必要采取相关解决措施来预防水害发生。研究成果可为相类似浅埋条件下的矿井安全高效开采提供技术支撑。

Wujiagou mine the 5105 face belongs to the typical shallow-buried fully mechanized top coal mining face under surface ditch flow. The area is rich in underground and surface water resources,and most of them are covered in the rock layer overlying the coal seam, the surface runoff inside the mine and the accumulation of water in the roof and the goaf will threaten the safety of the working face at any time. The COMSOL Multiphysics numerical simulation method is used to analyze the fracture zone on the stope. The simulation analysis of the water conduction characteristics confirmed that the Dashagou river and the wide water conduction flowing fracture zone are likely to threaten the safety of the face, so it is necessary to take relevant measures to prevent water damage. The research results can provide technical support for safe and efficient mining under similar shallow buried conditions.