江西煤炭科技2023年第1期摘要：针对大采高综采工作面初采时坚硬顶板悬顶垮落矿压显现剧烈问题，以回坡底煤矿10-110工作面坚硬顶板条件为背景，对坚硬顶板工作面顶板弱化技术进行了研究，结论如下：①采用数值模拟方法对工作面推进过程中煤岩体应力场进行了分析，根据分析结果，切顶后工作面前方应力集中区应力峰值大于未切顶时，有利于顶板断裂，断裂步距在30～35m范围内。②提出采用双向聚能爆破技术进行预裂切顶，并对爆破参数进行了设计。根据矿压监测结果，工作面初采时基本顶初次垮落步距在28～35m范围内，因此爆破切顶预裂技术方案能整体切落煤层上方坚硬顶板，实现切顶卸压。关键词：工作面初采；坚硬顶板；爆破切顶卸压；数值模拟中图分类号：TD823.85文献标识码：A文章编号：1006-2572（2023）01-0053-04StudyonRoofWeakeningTechnologyofHardRoofonLargeMiningHeightFaceFangXukang(HuipodiColliery,HuozhouCoalPowerGroup,Hongdong,Shanxi041600)Abstract:Aimingattheseverestratabehaviorofhardroofcavingintheinitialminingoflargeminingheightfullymechanizedminingface,takingthehardroofconditionsofthe10-110workingfaceofHuidipoCollieryasthebackground,theroofweakeningtechnologyofthehardroofisstudiedinthepaper,whoseconclusionsareasfollows:Firstly,thestressfieldofcoalandrockmassduringtheadvancingprocessoftheworkingfaceisanalyzedbynumericalsimulationmethod，whoseresultsshowthatwhenthepeakstressinthestressconcentrationareainfrontoftheworkingfaceafterroofcuttingisgreaterthanthatwithoutroofcutting,itisconducivetorooffracture,andthefracturestepiswithin30~35m.Secondly,thetechnologyoftwo-waycolletenergyblastingisproposedforpre-splitroofcutting,andtheblastingparametersaredesigned.Themonitoringresultsshowthattheinitialcavingstepdistanceofthebasicroofiswithin28~35m,whichprovesthetechnicalschemeofblastingroofcuttingandpresplittingcancutoffthehardroofabovethecoalseamasawholeandrealizeroofcuttingandpressurerelief.Keywords:initialmining;hardroof;blastingroofcuttingpressurerelief;numericalsimulation坚硬顶板大采高工作面顶板弱化技术研究房旭康（霍州煤电集团回坡底煤矿，山西洪洞041600）坚硬顶板控制是综采工作面采场围岩控制的重要内容，坚硬顶板岩层具有抗拉...
