College of Safety Science and Engineering, Xi'an University of Science and Technology
Shanxi Heshun Tianchi Energy Co., Ltd.

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 thebackground, and controls the gas overrun of this coal seam through pre-extraction and high-efficiency sealing ofthe upper corner. The refinement of gas control parameters can effectively improve the problems of poorpermeability enhancement effect and low corner sealing efficiency in soft coal seam. In view of this, through fieldtest and numerical simulation, the parameters such as gas drainage amount and coal output under differentslotting time and water pressure are analyzed, and the technological indexes suitable for gas prevention andcontrol technology in soft coal seam are obtained. Results show that the increase of total coal output at differentslotting water pressures shows a downward trend, and with the increase of slotting water pressure, the increase oftotal coal output decreases and tends to be stable. The average gas extraction concentration of hydraulic slottedholes is 5.94~9.4 times that of conventional holes, and the initial extraction concentration of pre-extraction holesis more than 30%. Combined with the material performance and the field practice, the rapid plugging gas wall isdesigned and practised in the field. After plugging, the maximum gas concentration in the upper corner isdecreased by 32.93%.

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)

秦雷,林海飞,马超,等.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[J].湖南科技大学学报(自然科学版),2024,39(3):11-21.

QIN L, LIN H F, MA C, et al. Key Technical Parameters and Application of Corner Gas Control in Soft Coal Seam with HydraulicSlitting and Flexible Sealing Gas Wall [ J] . Journal of Hunan University of Science and Technology ( Natural Science Edition) ,2024, 39( 3) : 11-21.