第46卷第9期2023年9月采矿与井巷工程焦家寨矿深井高地应力切顶护大巷关键技术研究煤炭与化工CoalandChemicalIndustryVol.46No.9Sep.2023张金龙(晋能控股煤业集团轩岗煤电有限责任公司,山西忻州034114)摘要:为解决焦家寨矿221采区巷道在采动影响下失稳破坏的问题,以该采区22116综放工作面为工程背景,通过理论分析、工程类比、现场监测等手段进行切顶卸压护巷技术的研究和实践。研究结果表明,工作面适用爆破预裂切顶技术,爆破切顶位置设置在停采线后方20m处较合理,此次切顶目标岩层为9.68m的粗粒砂岩主关键层,切顶后轨道上山在采动影响下围岩变形量增幅很小,保护了采区巷道。关键词:厚煤层;爆破预裂;停采线;采区大巷中图分类号:TD35ResearchonkeytechnologyofhighgroundstressroofcuttingroadwayindeepmineofJiaojiazhaiMine(JinnengHoldingCoalGroupXuangangCoalandElectricityCo.,Ltd.,Xinzhou034114,China)Abstract:Inordertosolvetheproblemofinstabilityandfailureofroadwayin221miningareaofJiaojiazhaiMineundertheinfluenceofmining,takingthe22116fullymechanizedcavingfaceintheminingareaastheengineeringbackground,theresearchandpracticeofroofcuttingandpressurereliefroadwayprotectiontechnologyarecarriedoutbymeansoftheoreticalanalysis,engineeringanalogyandfieldmonitoring.Theresearchresultsshowthattheblastingpre-splitingroofcuttingtechnologyissuitablefortheworkingface,anditismorereasonabletosettheblastingroofcuttingpositionat20mbehindthestopline.Thetargetrockstratumofthisroofcuttingis9.68mcoarse-grainedsandstonemainkeystratum.Aftertheroofcutting,thedeformationofthesurroundingrockincreaseslitleundertheinfluenceofmining,whichprotectstheroadwayintheminingarea.Keywords:thickcoalseam;blastingpre-splitting;stoppingline;miningarearoadway文献标识码:BZhangJinlong文章编号:2095-5979(2023)09-0040-04煤工作面之间的关系如图1所示,自西向东分别为1概况221区皮带下山延深、回风下山延深、轨道下山延焦家寨矿221采区下山延深共3条下山,平均深,下山之间间距31.3m和36m。2号煤层平均埋深超过600m,22116工作面位于矿井+680水厚度4.7m,最大厚度7.3m,采用低位放顶煤回采平,扩221采区,开采2号煤层,工作面走向长方法,采高较大,采动影响范围远,采动压力较810m,倾...