坚硬煤层超高压水力割缝增透技术研究

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中图分类号：U467.48 文献标志码：A 文章编号：2095-2945（2025）24-0065-04

Abstract：InChinacoalseamshavelowpermeabilityanditisdificultforgasextractiontomeetstandards.Inorderto improvegasextractioneficiencyandatthesametimesolvetheproblemofpooslagremovalefectoftraditionalhydraulic measures，asetofultra-highpressurehydraulicslitingwithaworkingpressureofmorethan9OMPaisused.Theultra-high presure hydraulicslottedpressurerelief andpermeabilityenhancementtechnologyuseswaterasthemedium toscourandpeel offthecoalbodyaroundtheborehole，increasethenumberofcracksinthecoalbody，andimprovetheeficiencyofgas extraction.Itis the development direction of coal minegas disaster prevention measures one of the directions.

Keywords：hardcoalseam;ultra-hghpressure;hydraulicseamcutingpressurereliefandpermeabilityimprovementgasextraction

赵固二矿西翼措施巷二，煤层瓦斯含量在 9.33～ 14.80m3/t 之间，原始区域实测瓦斯压力为 0.16～ 0.36MPa ，钻孔瓦斯流量衰减系数在 0.1036～0.1546d-1 之间，二 1 煤层煤的坚固性系数在0.86～1.92，瓦斯放散初速度 ΔP 在28～42。（剩余4543字）