松软煤层水力割缝与柔性封堵气墙隅角瓦斯治理关键技术参数及应用  

Key Technical Parameters and Application of Corner Gas Control in Soft Coal Seam with Hydraulic Slitting and Flexible Sealing Gas Wall

作　　者：秦雷 林海飞 马超 李树刚 赵鹏翔 甘路军 杨二豪 徐金国 QIN Lei;LIN Haifei;MA Chao;LI Shugang;ZHAO Pengxiang;GAN Lujun;YANG Erhao;XU Jinguo(College of Safety Science and Engineering,Xi an University of Science and Technology,Xi an 710054,China;Shanxi Heshun Tianchi Energy Co.,Ltd.,Jinzhong 032700,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]山西和顺天池能源有限责任公司,山西晋中032700

出　　处：《湖南科技大学学报（自然科学版）》2024年第3期11-21,共11页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：中国科协青年人才托举工程项目资助(2022QNRC001);西安科技大学优秀青年科技基金资助项目(2024YQ2-03);陕西省青年人才托举计划项目资助(20220437);国家自然科学基金资助项目(51904237,52074217)。

摘　　要：为保证松软煤层安全开采,以天池煤矿为背景,通过采前预抽和高效封堵上隅角协同治理本煤层瓦斯超限.瓦斯防治参数细化能有效改善松软煤层水力割缝增透效果差,隅角封堵效率低等问题.对此,通过现场试验及数值模拟,分析不同割缝时间、水压下瓦斯抽采量及出煤量等参数,得出适用于松软煤层瓦斯防治技术工艺指标.结果表明:不同割缝水压总出煤量增幅呈下降趋势,随着割缝水压上升,总出煤量增幅减小趋于稳定.水力割缝钻孔平均瓦斯抽采浓度为常规钻孔的5.94~9.40倍,预抽孔初始抽采浓度大于30%.结合材料性能及现场实际,设计研发快速封堵气墙并应用于现场,封堵后上隅角最大瓦斯浓度降幅32.93%.In order to ensure the safe mining of soft coal seam,this paper takes Tianchi Coal Mine as the background,and controls the gas overrun of this coal seam through pre-extraction and high-efficiency sealing of the upper corner.The refinement of gas control parameters can effectively improve the problems of poor permeability enhancement effect and low corner sealing efficiency in soft coal seam.In view of this,through field test and numerical simulation,the parameters such as gas drainage amount and coal output under different slotting time and water pressure are analyzed,and the technological indexes suitable for gas prevention and control technology in soft coal seam are obtained.Results show that the increase of total coal output at different slotting water pressures shows a downward trend,and with the increase of slotting water pressure,the increase of total coal output decreases and tends to be stable.The average gas extraction concentration of hydraulic slotted holes is 5.94~9.4 times that of conventional holes,and the initial extraction concentration of pre-extraction holes is more than 30%.Combined with the material performance and the field practice,the rapid plugging gas wall is designed and practised in the field.After plugging,the maximum gas concentration in the upper corner is decreased by 32.93%.

关 键 词：松软煤层 水力割缝 采前预抽 上隅角 瓦斯超限 

分 类 号：TD712.6[矿业工程—矿井通风与安全]