苏士龙, 张永民, 李文刚, 高海海, 赵有志, 王向东, 郑亮. 可控冲击波增透技术在吉宁低孔低渗松软煤层的应用[J]. 中国矿业, 2021, 30(5): 173-179. DOI: 10.12075/j.issn.1004-4051.2021.05.007
    引用本文: 苏士龙, 张永民, 李文刚, 高海海, 赵有志, 王向东, 郑亮. 可控冲击波增透技术在吉宁低孔低渗松软煤层的应用[J]. 中国矿业, 2021, 30(5): 173-179. DOI: 10.12075/j.issn.1004-4051.2021.05.007
    SU Shilong, ZHANG Yongmin, LI Wengang, GAO Haihai, ZHAO Youzhi, WANG Xiangdong, ZHENG Liang. Application of controllable shock wave antireflection technology in Jining low porosity and low permeability soft coal seam[J]. CHINA MINING MAGAZINE, 2021, 30(5): 173-179. DOI: 10.12075/j.issn.1004-4051.2021.05.007
    Citation: SU Shilong, ZHANG Yongmin, LI Wengang, GAO Haihai, ZHAO Youzhi, WANG Xiangdong, ZHENG Liang. Application of controllable shock wave antireflection technology in Jining low porosity and low permeability soft coal seam[J]. CHINA MINING MAGAZINE, 2021, 30(5): 173-179. DOI: 10.12075/j.issn.1004-4051.2021.05.007

    可控冲击波增透技术在吉宁低孔低渗松软煤层的应用

    Application of controllable shock wave antireflection technology in Jining low porosity and low permeability soft coal seam

    • 摘要: 吉宁煤矿是典型的低透气性煤矿,可控冲击波技术是目前低透气性煤层增透的理想措施之一。适合于该矿的可控冲击波作业点间距、单点作业次数和孔口保留深度等参数尚未解决。针对上述问题,在吉宁煤矿低透气性煤层采帮区和非采帮区开展了可控冲击波增透技术的合理作业参数设计。考虑安全和作业效果因素设计了0~30 m和0~40 m两种孔口保留深度,考虑冲击波叠加和单孔作业效率影响设计了6 m和9 m两种作业点间距,考虑煤层物性差距设计了6次、8次和9次三种单点作业次数。试验结果:非采帮区3#增透孔采取冲击点间距9 m、单点冲击6次参数施工后钻孔平均抽采纯量最高,非采帮区增透钻孔平均日抽采量提高5倍,采帮区增透钻孔平均日抽采量提高5.9倍;孔口保留深度对增透效果的影响无规律可循;距离增透钻孔60 m处的1-2#观测孔抽采量明显高于本组增透孔。结果表明:吉宁煤矿可控冲击波作业参数以9 m冲击点间距、6次单点冲击次数最佳;孔口保留深度对增透效果影响无规律可循,根据现场施工经验维持在0~40 m较为合适;可控冲击波对吉宁煤矿煤层最大增透影响距离达60 m左右。

       

      Abstract: Jining coal mine is a typical low-permeability coal mine, the controllable shock wave technology is one of an ideal measure for increasing the permeability of low-permeability coal seams.Parameters such as the controllable shock wave operating point spacing, the number of single-point operations, and the orifice retention depth that are suitable for the mine have not yet been resolved.In view of the problems, reasonable operating parameter design of controllable shock wave anti-reflection technology is carried out in the mining area and non-mining area of the low-permeability coal seam of Jining coal mine.Considering the factors of safety and operation effect, two kinds of orifice retention depths of 0-30 m and 0-40 m are designed.Two kinds of operating point spacings of 6 m and 9 m are designed considering the impact of shock wave superposition and single-hole operation efficiency.Three single-point operations with 6 times, 8 times and 9 times are designed considering the physical property gap of the coal seam.The 3# anti-reflection hole in the non-mining area takes the operating point spacing of 9 m, and the single-point operation has 6 parameters.The average daily drainage volume of the anti-reflection boreholes in the mining area increased by 5.9 times; the effect of the retention depth of the orifice on the anti-reflection effect is irregular; the drainage volume of the 1-2# observation hole at a distance of 60 m from the antireflection hole higher than this group.The results show that the controllable shock wave operating parameters of Jining coal mine are the best at 9 m operation point spacing and 6 single-point operations; the effect of retained hole depth on the anti-reflection effect is irregular and can be maintained at 0-40 m according to site construction experience.The maximum impact distance of controllable shock wave on the coal seam of Jining coal mine reaches about 60 m.

       

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