水力压裂技术在区域瓦斯抽采中的应用效果  

The Application and Experimental Effect of Hydraulic Fracturing Technology in Regional Gas Extraction

作　　者：刘志飞 谢雄刚[1] LIU Zhifei;XIE Xionggang(Mining College,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025

出　　处：《矿业工程研究》2022年第3期45-50,共6页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(52164016)。

摘　　要：为了提高区域煤层瓦斯的抽采效果,降低煤层瓦斯含量,保证煤矿安全生产,以贵州某矿9煤层为研究对象,研究水力压裂技术在区域煤层瓦斯抽采中的应用效果.测试9煤层水力压裂前后压裂钻孔、考察钻孔、常规钻孔的出水量以及瓦斯浓度、煤层含水率等数据,对比分析试验数据,结果表明:压裂钻孔水力压裂影响半径达25 m以上;9煤层通过水力压裂后,单孔瓦斯浓度最高提高了45%~50%.水力压裂技术能够显著改善煤层瓦斯流动条件,有效提高区域瓦斯抽采效果,降低煤层瓦斯含量,对区域瓦斯治理工作具有指导作用.In order to improve the gas drainage effect of regional coal seam, reduce the gas content of coal seam and ensure the safety of coal mine production, the application effect of hydraulic fracturing technology in regional coal seam gas drainage is studied by taking No.9 coal seam of a mine in Guizhou Province as the research object. No. 9 data of water yield, gas concentration and water content of coal seam before and after hydraulic fracturing of coal seam, including fractured boreholes, inspection boreholes and conventional boreholes, are compared and analyzed. Results show that the influence radius of hydraulic fracturing of fractured boreholes is more than 25 m. After hydraulic fracturing, the gas concentration in single hole of No. 9 coal seam is increased by 45%~50%. Hydraulic fracturing technology can significantly improve the gas flow conditions of coal seam, effectively improve the regional gas extraction effect, and reduce the gas content of coal seam, which has a guiding significance in regional gas control work.

关 键 词：水力压裂 瓦斯抽采 影响半径 含水率 

分 类 号：TD713[矿业工程—矿井通风与安全]