摘要 虎龙沟煤矿8煤层部分区域采用采9留6m的房柱式采煤方法回采完毕,上部的5 煤层因而处于蹬空开采状态,5煤层拟采用长壁综放开采方案 本文首先对虎龙沟煤矿8煤层和5煤层及其顶底板岩性!结构!稳定性等进行了详 细的现场调研与分析,并采用多种理论方法,对房式开采后顶板覆岩及5煤层的变形进 行了预计,对煤柱稳定性进行了分析其次,基于该矿的现实条件,建立三维FLAC3 模型,分别对8煤层不同采宽留宽!未垮落和梯形垮落等8种情况下,5煤层底板的下 沉!倾斜!曲率变化规律进行了预测然后在上述8种情况下,对5煤层布置长壁综放 工作面进行模拟开采,分析不同推进步距时,5煤层底板!8煤层空区煤柱的压力及变形, 以此预测5煤层长壁开采过程对8煤层空区煤柱稳定性的影响最后给出了5煤层工作 面巷道掘进过程中底板破坏程度及破坏深度探测方案 本课题的研究,对蹬空区上方煤层安全开采有重要的工程应用价值 关键词:房式开采,上行开采,长壁开采,底板变形,煤柱稳定,FLAC.0山东科技大学硕士学位报告摘要 Abstract 8eoalseamofHulonggoueoalmineareauseadoPtinggmleaving6mwhich15roomand PillartyPemethod15StoPingfinished.SotheuPsideof5eoalseam15inPedalemPtyminingstatus5eoal seamlongwall15willusefully一mechanizedsubleveleavingminingscheme. Atflrst,thisarticleshowadetailedsiteinvestigationandanalysisofroofandfloor lithology,struetureandstabilityof8and5eoalseam,anduseavarietyoftheoretieal methods,tyPingroomandtheroofrockafterminingofeoaldeformationofs,andanalyZethe stabilityofeoalPillarSeeondly,basedonthesPeeifieeonditionsofthemine,a three一dimensionalFLAC3Dmodel15established.5coalseamfloorofthesink,tilt,eurvature variation15Predietedat8differenteoalminingwidthtostaywide,withouteavingandeaving ladderandother8cases.Thensimulate5eoaleavinglongwallminingfaeeandanal界e5eoal seamfloor,8eoalPillarcavityPressureanddeformationwhenPushedfromthedifferent ProgresstoPredictaffectof5eoalminingto8emPtyareaofeoalPillarstability.Finally, ProPosefiveeoal一faeetunnelingProeesstothedePthoffloordamageandfailuredeteetion Program. TheresearehofProjeethasimPortantaPPlicationvalueforthesafetyofemPtyareaofthe treadaboveminingeoal. Keywords:RoomtyPemining,UPwardmining,Longwallmining,FloorDeformation, Coalpillarstability,F以e3D山东科技大学硕士学位报告目录 目录 1绪论.................................................1 1.1国内外研究与发展概况......................................................,.........................................1 1.2项目研究的意义..............................................................,...........................................5 1.3课题研究的主要内容.................,...........................-..............................,6 1.4项目研究的技术路线.....................,............................................................................... 2工程概括及调研结果分析................................7 2.15煤层及8煤层顶底板特征分析.....................................................................................7 2.2蹬空区开采状况分析................................................................................................10 38煤层采空区覆岩破坏高度及条带煤柱稳定性理论预测......15 3.18煤层顶板冒裂带发育高度预测................................巧 3.2条带煤柱稳定性分析..........................................20 3.35煤层底板移动变形情况预测..................................25 3.4小结........................................................28 4井下探测研究方案.....................................29 4.1钻孔双端封堵测漏方案........................................29 4.2底板钻探过程中漏水量及取芯率变化研究方案....................31 4.3钻孔电视探测方案............................................33 5FLAC3D模拟研究.......................................37 5.1工程概况....................................................37 5.2FLAC3D模拟方案..............................................37 5.38煤层开采对5煤层底板变形的影响..........................,.41 5.4空区上部5煤层长壁开采影响研究..............................48 6主要结论.............................................79 致谢.................................................80