高压水力割缝抽采技术研究  

Research on high pressure hydraulic slotting extraction technology

作　　者：岳刘杰 齐庆杰 YUE Liujie;QI Qingjie(Ltd.,Ordos 017205,China;School of Mining,Liaoning Technical University,Fuxin 123000,China;Institute of Emergency Science,China Coal Technology and Engineering Group,Beijing 100013,China)

机构地区：[1]国能神东煤炭集团乌兰木伦煤矿,内蒙古鄂尔多斯017205 [2]辽宁工程技术大学矿业学院,辽宁阜新123000 [3]中国煤炭科工集团应急科学研究院,北京100013

出　　处：《陕西煤炭》2023年第1期1-5,40,共6页Shaanxi Coal

基　　金：国家自然科学基金项目(51274113);国家重点研发计划重点专项项目(2018YFC0807900)。

摘　　要：平顶山矿区具有煤层开采难度大、煤体透气性低下、瓦斯压力大的特点。为实现矿井煤层增透、优化瓦斯抽采工艺、高效防治煤与瓦斯突出,使用COMSOL多物理学数值模拟和现场试验对高压水力割缝抽采参数进行研究。模拟结果表明,水力割缝后最佳抽采负压为-30 kPa,最佳钻孔布置间距在6~8 m。通过现场试验得出,7 m间距割裂孔抽采127 d瓦斯压力下降到0.74 MPa以下,抽采150 d瓦斯压力下降为0.61 MPa,抽采150 d残余瓦斯含量下降为5.43 m^(3)/t,达到最佳消突效果,7 m为割裂孔布置的最佳间距。Pingdingshan mining area has the characteristics of difficult coal seam mining, low coal permeability, and high gas pressure.In order to increase permeability of coal seam, optimize gas extraction technology and effectively control coal and gas outburst, COMSOL-Multiphysics numerical simulation and field test are used to study the extraction parameters of high pressure hydraulic slotting.The simulation results show that the optimal extraction negative pressure is-30 kPa after hydraulic slotting, and the optimal drilling spacing is 6~8 m.Through the field test, it is found that the gas pressure dropped below 0.74 MPa after 127 days of gas extraction by 7 m spacing split holes, the gas pressure after 150 days of extraction decreased to 0.61 MPa, and the residual gas content after extraction for 150 days decreased to 5.43 m^(3)/t, which achieved the best outburst elimination effect, and 7 m spacing was the best spacing for split holes.

关 键 词：低透气性 水力割缝 COMSOL多物理学 卸压增透 瓦斯抽采 

分 类 号：TD713[矿业工程—矿井通风与安全]