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为解决新安煤矿瓦斯治理难题,提高瓦斯治理水平、增强防突效果,结合矿井煤体特性及煤层赋存特征,在14230工作面顶板1、2号钻场分别施工压裂钻孔,注入高压流体进行压裂以达到对煤体卸压增透的目的。并使用瞬变电磁仪对压裂的影响范围进行了考察。现场试验结果表明:该技术能有效提高抽采钻孔的瓦斯浓度及流量,大幅提高瓦斯抽采效果,有效地降低施工区域的突出危险性。通过现场试验形成了一套适合新安煤矿瓦斯地质条件的卸压增透工艺技术。
In order to solve the problem of gas treatment in Xin’an coal mine, improve the level of gas control and enhance the effect of preventing outburst, combined with the characteristics of coal seams and the occurrence characteristics of coal seam, fractures were drilled in No.1 and No.2 drilling sites of No.242 working face respectively, Fracturing in order to achieve the purpose of reducing pressure and increasing permeability of coal. The influence range of fracturing was investigated by using the TEM. The field test results show that the technology can effectively improve the gas concentration and flow rate of the drainage borehole, greatly improve the gas drainage effect and effectively reduce the prominent danger in the construction area. Through the field test, a set of pressure relief and permeation technology for coal gas geological conditions in Xin’an coal mine has been formed.