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采用RFPA2D数值模拟软件对东庞矿21101工作面煤层顶板冒落规律及裂隙特性进行了数值模拟,利用模拟结果分析采空区顶板产生裂隙、断裂、冒落和离层情况及其变化规律。采用Fluent数值模拟软件对下行通风工作面采空区瓦斯运移及分布规律进行了模拟研究。在此基础上对21101工作面高位钻孔参数进行了优化设计,并对抽放效果进行了考察分析。验证了下行通风工作面瓦斯运移规律研究的准确性及高位钻孔设计的合理性。
Using RFPA2D numerical simulation software to simulate the roof caving law and fracture characteristics of 21101 working face in Dongpang Mine, the fissure, fracture, caving and detachment of roof in goaf are analyzed with the simulation results. Fluent numerical simulation software was used to simulate the gas migration and distribution in the gob of the downward ventilation face. Based on this, the optimal drilling parameters of 21101 working face were optimized, and the drainage effect was investigated and analyzed. The veracity of the research on the gas migration law of the downward ventilation face and the rationality of high-level borehole design are verified.