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通过对上覆岩层采空区中离层区域形成的描述,分析并绘制了离层空间位置及高抽钻孔布置原则和参数计算图,并据此优化了离层区域内瓦斯抽放工艺。采用钻孔返水计量法对瓦斯抽放效果影响最大的冒落带高度进行实测,通过不同位置处冒落线预计高度与实测计算高度的一致性,进一步证明了理论计算方法正确性。
Based on the description of the formation of the delamination zone in the overlying strata, the principle of spatial arrangement of the strata and the layout of the high pumping borehole and the parameter calculation diagram are analyzed and drawn. Based on this, the gas drainage technology in the stratified zone is optimized. The height of the caving zone, which has the most influence on the gas drainage effect, was measured by the drilling backwater measurement method. The correctness of the theoretical calculation method is further proved by the consistency between the estimated height of the cauldron at different positions and the measured height.