沙曲一矿新型瓦斯抽采钻孔密封技术应用

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中图分类号：TD712.6 文献标志码：A 文章编号：2095-2945（2025）21-0162-05

Abstract：Inorder toimprovethesealingqualityofundergroundgasdrainage boreholesin ShaquNo.1Coal Mine，based onthetestbasis，thesealingqualityofcurrentgasdrainageboreholeswasobjectivelyanalyzedthroughboreholesealingquality evaluationandboreholeleakagedetectionmethods.Anew"hard-soft-hard”sandwichboreholesealing technologysuitableforthe specialdrllingconstructiontechnologyof"sealingtheholefirst，thencompletingthehole"inShaquNo.1CoalMinewas proposed，andthesealingefectwascarredoutinthebeltlaneofthe42workingface.ComparativetestResearchhasshown thatduetotheinfluenceofdrilingconstructiontechnology，itisdifcultforexpandedcementtoadapttothecontinuous disturbanceofthedrillpipeandthedynamicdeformationoftheborehole，resultinginseriousairleakageintheboreholesealing section，the deviation of the borehole gas drainage concentration reaches 69.2% ，and the borehole sealing quality is poor. The newprocessutilizesthehighadhesion，highpermeabilty，andadaptivedeformationcharacteriticsofflexiblegelsalingmaterials toachievea1.8-foldincreaseintheaveragegasdrainageconcentrationinasinglehole，andthegasdrainageffectis significantly improved.

Keywords：gasdrainage;boreholesealingtechnology;boreholesealingqualityevaluation；drllingleakagedetection;phase change gel; self-adaptive sealing

沙曲一号煤矿为煤与瓦斯突出矿井，煤层条件复杂，是我国典型的近距离煤与瓦斯突出煤层群赋存条件，瓦斯问题严重制约着矿井的安全高效生产I。（剩余6174字）