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在地应力作用下巷道围岩破碎形成裂隙区,造成瓦斯抽采率低,通过数值模拟分析围岩应力荷载变化,确定裂隙区范围。以贵州五轮山煤矿为试验区,根据数值模拟结果进行定点定长度封孔试验。
Under the action of local stress, the surrounding rock of the roadway breaks down to form the fracture zone, resulting in low gas drainage rate. The change of stress and strain of the surrounding rock is analyzed by numerical simulation to determine the fracture zone. Taking the Wulunshan coal mine in Guizhou as the experimental area, fixed-point fixed-length sealing experiments were conducted according to the numerical simulation results.