高负压瓦斯抽采钻孔封孔新工艺及应用效果分析

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中图分类号：TQ323.5 文献标志码：A文章编号：1001-5922（2026）1-0181-04

Abstract：Aiming atthe problems of poor sealing performanceand low extraction eficiencyof traditional hole-sealing materials in high negative pressure gas drainage environments，anew type of hole-sealing material based on an epoxy resin-cement composite system was researched and developed，and a matching construction process of prefabricated casing plus segmented grouting was designed.Software such as FLAC3D，COMSOL and ANSYS were used to conduct numerical simulations of surrounding rock stress，seepage behavior and material mechanical response，so as to verifythestabilityand sealing reliabilityof the composite material under high negative pressure.The testresults show that the material has a compressive strength of 45.2 MPa，a permeability coefficient as lowas 8.2×10 m/s （note：the original text may have a mising negative exponent，which is a common magnitude for such materials）， anda 9O-day shrinkage rate of only 0.15% .Compared with the traditional process，the gas drainage concentration is increased by 40% ，the pure drainage volume is increased by 58% ，the borehole negative pressure stability is enhanced，and the cumulative drainage volume of a single borehole is increased by 116.5% ：

Key words：high negative pressure gas extraction;borehole sealing;composite material;extraction eficiency;ealing performance

瓦斯抽采是煤矿安全生产的重要环节，钻孔封孔质量直接影响抽采效果，随着开采深度增加与抽采负压提升，传统水泥砂浆封孔工艺面临严峻挑战，高负压条件下封孔段易出现裂缝以及漏气现象，导致抽采浓度下降效率降低，国外先进矿井已开始采用聚合物基复合材料进行封孔，但其在国内高瓦斯矿井的适用性尚需验证，因此开发适用于我国煤矿地质条件的高负压封孔新工艺，对提升瓦斯抽采效果保障矿井安全具有重要意义，该项技术的突破将为煤矿瓦斯治理提供新的解决方案。（剩余5806字）