深部煤巷条带区域双重卸压防突方法研究
Research on Double Pressure Relief and Outburst Prevention Method in Strip Zone of Deep Coal Roadway
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摘要: 针对深部高地应力煤巷条带区域防突,分析了瓦斯抽采对深部煤与瓦斯动力灾害的影响,揭示了深部瓦斯抽采后增加了地应力主导型突出危险的灾害新特点。提出了将卸压底板岩巷预先布置在待掘煤巷正下方一定距离对巷道上覆煤岩体的地应力进行卸压,同时联合使用穿层钻孔对煤巷条带进行卸压抽采的煤巷条带区域双重卸压防突方法,并应用于工程实践。实践表明:卸压底板巷上覆煤岩体的卸压效果显著,穿层钻孔卸压抽采显著提高,实现了同时消除地应力危害和瓦斯危害的双重作用。Abstract: Aiming at the anti-burst in the deep high-stress coal roadway strip zone, we analyzed the influence of gas drainage on deep coal and gas dynamic disaster and revealed the new characteristics of disasters with increased ground stress-dominated outburst danger after deep gas drainage. We proposed the double pressure relief and anti-burst method of the coal lane strip area. It is that the pressure relief floor rock tunnel is pre-arranged at a certain distance directly below the coal road to be excavated to relieve the ground stress of the overlying rock mass on the roadway, at the same time, the dual pressure relief and outburst prevention method of strip area of coal roadway for pressure relief extraction by through-beds boreholes is used in combination, and applied to engineering practice. The practice shows that the pressure relief effect of the overburden coal and rock mass on the floor roadway is remarkable, and the pressure relief and extraction of the through-beds hole is significantly improved, which realizes the dual role of eliminating the stress hazard and gas hazard at the same time.
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