近距离煤层群保护层开采截流钻孔施工技术张百颂（平顶山天安煤业股份有限公司勘探工程处，河南平顶山467000）摘要：为解决近距离煤层群保护层开采过程中工作面瓦斯超限问题，本文提出近距离煤层群保护层开采截流钻孔施工技术。根据工程概况的分析，通过钻孔技术进行瓦斯抽采施工：合理规划布置钻场；基于煤层高度计算公式设计钻孔施工参数；根据煤层重新压实区域参数确定钻孔位置；通过钻孔的方位角与倾角控制钻孔轨迹；采用两堵一注模式封孔。工程验收结果表明：本次施工共钻孔54个，预期数据曲线与实际瓦斯抽采浓度数据曲线重合度较高，验证本次施工效果较好。关键词：近距离保护层；煤层群；开采截流；钻孔施工中图分类号：TD712.6文献标志码：A文章编号：1009-0797（2023）02-0018-04Constructiontechnologyofcut-offdrillingforminingprotectionlayerofclosecoalseamgroupZHANGBaisong(PingdingshanTiananCoalIndustryCo.,Ltd..ExplorationEngineeringOffice，Pingdingshan467000，China）Abstract:Inordertosolvetheproblemofgasoverrunintheworkingfaceduringtheminingoftheprotectionlayeroftheclosecoalseamgroup,thispaperputsforwardtheconstructiontechnologyofinterceptinganddrillingintheminingoftheprotectionlayeroftheclosecoalseamgroup.Accordingtotheanalysisofthegeneralsituationoftheproject,thegasdrainageconstructioniscarriedoutthroughthedrillingtechnology:reasonablyplanandarrangethedrillingsite;Thedrillingconstructionparametersaredesignedbasedonthecalculationformulaofcoalseamheight;Determinethedrillingpositionaccordingtotheparametersoftherecompactionareaofthecoalseam;Thedrillingtrajectoryiscontrolledbytheazimuthandinclinationoftheborehole;Adopttwopluggingandoneinjectionmodetosealthehole.Theprojectacceptanceresultsshowthatthereare54boreholesinthisconstruction,andtheexpecteddatacurveandtheactualgasextractionconcentrationdatacurvehaveahighdegreeofcoincidence,whichverifiesthattheconstructioneffectisgood.Keywords:closeprotectionlayer；coalseamgroup；miningclosure；drillingconstruction0引言在煤矿的开采过程中，存在很多不稳定的危险元素，其中瓦斯所带来的灾害逐年攀升，防治难度也逐渐增大。为了保障煤矿开采的安全，需要对近距离煤层群保护层进行开采，这...
