引流钻孔在巷道极破碎顶板内注浆堵水中的应用研究摘要：对顶板极其破碎耐压强度较低的涌水巷道进行堵水时，一般采用浅层注浆加固，深部引流泄压注浆的施工工艺。引流泄压钻孔施工中需要解决钻孔内涌水时喷渣堵孔的难题，否则引流孔堵孔后会使巷道顶板承压富水区水压升高，而升高的水压在巷道薄弱顶板上引起顶板变形，甚至冒落而出现工程安全事故。在此提出了增加裸孔段孔径，加大中空注浆锚杆直径和长度，把中空注浆锚杆下入到破碎带以上，以达到中空注浆锚杆在引流孔内止水隔离的作用；指出了引流钻孔可以改善注浆浆液扩散范围，减少注浆中承压水对注浆压力的反作用影响，从而确保注浆效果。关键词：巷道涌水；引流钻孔；富水破碎区；中空注浆锚杆；注浆堵水Abstract:thecrushingstrength,brokenroofextremelylowwatergushingwaterentrytime,generallyUSEStheshallowgroutingconsolidation,deepdrainagegroutingpressurereliefofconstructiontechnology.Drainageboreholeconstructionpressurereliefneedtobesolvedinwatergushingindrillingholewallspraywhenslagproblem,ordrainageholeswouldmakeaholewallofroofconfinedrichwaterpressureincreases,andincreasethepressureintheroadwayonroofdeformationcausedbyweakroof,andeventakefallandappearengineeringsafetyaccidents.Intheproposedincreasenakedholesectionaperture,andincreasethehollowgroutingboltdiameterandlength,thehollowgroutingbolttoabrokendownintothewithabove,inordertoachievethehollowgroutingboltholeinthedrainagewaterstopisolationeffect;Pointsoutthedrainageboreholecanimprovegroutdiffusionarea,reducethegroutingconfinedwatertothereactionofthegroutingpressureeffectstoensuregroutingeffect.Keywords:watergushingroadway;Drainageborehole;Richwaterbreakzone;Hollowgroutingbo《Groutingwater:TD74文献标识码：A：Abstract:Thecraftthatshallowgroutingconsolidation,deepdrainagingandreleaseingpressurewereuesdduringpluggingthewaterofroadwaywhoseroofwasbrokenanditsstrengthofthepressureisloWhenconstructingthedrainageboreholeitneedtosolveaproblemthatthejetofslagstonecanjamdrilling.Otherwisewhendrainageholesblocked,therichwaterpressureofroofwillrise.Risingwaterpressurecancauseroofdeformationandeventakefell,thuspresentsengineeringsafetyaccidents.Constructionofthedrainageholescanincreasethenakedholesectionaperture,andincreasethehollowgroutinganchordiameterandlength.Hollowgroutinganchorwasinsertedintothefracturezoneabove,havethefunctionofwaterstopisolation.Drainageboreholealsoplaystheroleofimprovinggroutdiffusionarea,reducingthegroutingconfinedwatertothereactionofthegroutingpressureandensuringgroutingeffect.Keywords:roadwaysurgingwater;drainageborehole;richwaterbreakzone;hollowgroutinganchor;grouting0引言山东鲁能菏泽煤电开发有限公司郭屯煤矿位于郓城县境内，2005年10月16日开工建设，2010年3月生产运行。该矿井属于水文地质条件极复杂矿井，也是受到高冲击地压威胁比较严重的矿井。主采煤层为煤3。在开采煤3时，工作面分别受到煤层顶板高温高压砂岩含水层(、M5)水的威胁。在矿压的作用下，巷道顶板极薄弱岩层（泥岩和粉砂岩）产生新的裂隙，顶板承压水分别通过裂隙和断层进入到巷道，形成顶板淋水和断层部位的集中涌水。而且泥岩和粉砂岩在水的长期浸泡作用下，泥化变软失稳，造成巷道冒顶。该矿井回风石门和胶带石门都分别受到其顶板砂岩水的影响，出现了围岩变形、顶板断层处集中涌水和部分块段散状淋水现象，严重影响了设备的正常运行和机电设备的维护，增大了矿井排水压力，增加了生产成本。为确保矿井正常安全生产，减少矿井涌水量，需对矿井两条巷道内的各涌水段（点）进行注浆封堵。其中总回上山顶板涌水点为断层导通性出水，水源分析为M5砂岩及以下的砂岩含水层，总涌水量为25m3/h左右，具有集中涌水...