顶板致裂增大煤层透气性技术应用
Technology Application of Roof Fracturing and Increasing Permeability of Coal Seam
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摘要: 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。Abstract: To solve the gas control problem of Xin'an Coal Mine, improve the level of gas control and strengthen the outburst prevention effect, combining with the coal properties and coal seam occurrence characteristics, two fracturing holes were constructed in No.1 and No.2 drilling field through the roof at 14170 working face by injecting the high pressure fluid through drilling fracturing to achieve the pressure relief and permeability increasing purpose. The experimental results in field show that the technology can effectively improve the gas concentration and flow of gas drainage borehole, and improve the effect of the gas extraction greatly and reduce the outburst danger of construction area effectively. A pressure relief and permeability increasing technology that is suitable for Xin'an Coal mine was formed through tests in field.
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