松软煤层顺层定向钻进技术在杨柳矿的应用试验研究*牛心刚1，徐瑞2，孙东玲1，张永将1，曹建军1，李健2（1.中煤科工集团重庆研究院有限公司瓦斯研究分院，重庆400037；2.淮北矿业股份有限公司，安徽淮北235000）摘要：针对松软煤层顺煤层定向瓦斯治理钻孔打不深、打不准、成孔率低的难题，详细分析了现有顺层定向钻进的技术瓶颈，创新尝试使用了底板定向梳状条带消突钻孔，突破了主孔快速开分支、分支孔水力下筛管护孔等技术难题，并选取杨柳煤矿1077中段机巷进行现场试验，在煤层坚固性系数为0.46的松软层中，共完成总进尺8494m，实验效果达到设计要求。现场试验表明，底板定向梳状条带消突钻孔有效缓解了采掘接替紧张局面，提高了矿井钻孔施工及瓦斯治理技术水平，为松软煤层定向瓦斯治理钻孔施工提供了新的技术思路。关键词：松软煤层；顺层定向钻进；瓦斯治理；筛管护孔中图分类号：TD712文献标志码：A文章编号：1008－8725（2023）02－047－04ApplicationTestResearchofBeddingDirectionalDrillingTechnologyinSoftCoalSeaminYangliuMineNIUXingang1,XURui2,SUNDongling1,ZHANGYongjiang1,CAOJianjun1,LIJian2(1.GasResearchBranch,ChinaCoalTechnologyandEngineeringGroupChongqingResearchInstitute,Chongqing400037,China;2.HuaibeiMiningCo.,Ltd.,Huaibei235000,China)Abstract：Aimingattheproblemsofinadequatedrilling,inaccuratedrilling,andlowholeformationratefordirectionalgascontrolinsoftcoalseams,thetechnicalbottleneckoftheexistingbeddingdirectionaldrillingwasanalyzedindetail,andaninnovativeattemptwasmadetousethefloordirectionalcombstriptoeliminateburstingholesbrokethroughthetechnicalproblemssuchasrapidbranchingofthemainholeandhydraulicscreenprotectionofthebranchholes.ThemechanicalroadwayinthemiddlesectionofYangliucoalmine1077wasselectedforon-sitetesting.Theresultswerecompletedinasoftlayerwithacoalseamfirmnesscoefficientof0.46.Thetotalfootageis8494m,andtheexperimentalresultsmeetthedesignrequirements.Fieldtestshaveshownthatthedirectionalcomb-shapedstripoutburst-eliminatingdrillingontheflooreffectivelyalleviatesthetensionofminingreplacement,improvesthetechnicallevelofminedrillingandgascontrol,andprovidesanewtechnicalideaforthedrillingofdirectionalgascontr...
