紅石巖煤礦回采巷道底鼓機(jī)理及防治技術(shù)研究.pdf

1、論文題目：紅石巖煤礦回采巷道底鼓機(jī)理及防治技術(shù)研究專業(yè)：采礦工程碩士生：李軍（簽名）指導(dǎo)教師：張恩強(qiáng)（簽名）摘要回采巷道底鼓防治是煤礦開采的難點(diǎn)問題之一，探索回采巷道的破壞機(jī)理及防治技術(shù)具有重要的理論意義和實(shí)用價(jià)值。本文通過現(xiàn)場(chǎng)觀測(cè)和理論分析對(duì)紅石巖煤礦回采巷道破壞機(jī)理及防治技術(shù)進(jìn)行了系統(tǒng)研究?，F(xiàn)場(chǎng)觀測(cè)了12406回風(fēng)順槽的變形破壞資料，得出回采巷道為軟巖回采巷道。12407回風(fēng)順槽的底鼓原因主要是12406回采工作面的二次采動(dòng)影響。1

2、2407回風(fēng)順槽在12406回采工作面的影響下，兩幫應(yīng)力較高，兩幫將應(yīng)力傳遞到底板，底板巖層在巷道兩幫圍巖的高應(yīng)力作用下被擠向巷道內(nèi)部形成底鼓，鼓起的底板在兩幫形成向上的剪切應(yīng)力，使巷道兩幫發(fā)生剪切性破壞，得出IV采區(qū)回采巷道的底鼓屬于典型的擠壓流動(dòng)型底鼓，造成底鼓的主要原因是兩幫應(yīng)力較大和底板巖層較軟。得出回采巷道的底鼓機(jī)理是工作面二次采動(dòng)影響之后，對(duì)回采巷道底鼓治理方案進(jìn)行了系統(tǒng)研究，最終結(jié)合紅石巖煤礦具體情況，提出利用卸壓槽治理巷

3、道底鼓的方案。為了驗(yàn)證方案的有效性，利用卸壓槽治理底鼓的方案在12407回風(fēng)順槽應(yīng)用并在卸壓槽附近布置了測(cè)站進(jìn)行觀測(cè)研究。監(jiān)測(cè)數(shù)據(jù)表明巷道頂板下沉量極小，巷道頂?shù)装逑鄬?duì)移近量主要由底板鼓起造成，相對(duì)移近量在距離工作面30~40m處開始加速增長(zhǎng)，驗(yàn)證了巷道底鼓機(jī)理是二次采動(dòng)影響；通過有無卸壓槽的測(cè)量數(shù)據(jù)對(duì)比得出卸壓槽在紅石巖煤礦IV采區(qū)軟巖回采巷道底鼓治理中起到了極大作用，有效地控制了底鼓，保證了回采工作的安全生產(chǎn)和高效生產(chǎn)。關(guān)鍵詞：軟巖

4、巷道；底鼓機(jī)理；卸壓槽；現(xiàn)場(chǎng)監(jiān)測(cè)研究類型：應(yīng)用研究Subject：ThestudyoffailuremechanismpreventioncontroltechnologyofthestopingtunnelinHongshiyancoalmineSpecialty：MiningEngineeringName：LiJun(Signature)Supervis：ZhangEnqiang(Signature)ABSTRACTTheprobl

5、emofthepreventioncontroloffloheaveinthestopingtunnelhasbecomeoneofthedifficultproblemsincoalminingfieldsotoexplethefailuremechanismpreventioncontroltechnologyinthestopingtunnelhasimptanttheeticalvaluepracticalvalue.Thepa

6、perhasconductedasystematicstudyofthepreventioncontrolofthestopingtunnelinHongshiyancoalminebyfieldobservationaswellasbytheeticalanalysis.Theunderstingobservedthematerialsofdefmationfailurein12406returnairroadwayisthatthe

7、stopingtunnelsinIVminingareaaresoftrockroadways.Thereasonoffloheavein12407returnairlanewayisthatthesecondarymininginfluencefrom12406wkingface.Undertheinfluencefrom12406wkingface，thetwosidesin12407returnairlanewayisunderh

8、igherstresswillstresstotheflo.Underthehighstressfromtwosidesof12407returnairlaneway，flostratasaresqueezedtotheinsideofroadwaythesummonupofthebottomoftheroadwayisfmed.Becauseofthesummonupofthebottomoftheroadwayupwardshear

9、stresshasbeenfmedinthetwosidescausesshearfractureinthetwosidesofroadway.FloheaveofroadwayinIVminingareamainlyfthehighstressintwosidesthesoftbottomlayersisidentifiedastypicalextrusionflowtype.Afterlearningthatthemechanism

10、offloheaveofroadwayissecondarymininginfluencefromthelastwkingfacethecontroltheyofthestressfromthestopingtunnelsissystemicintroduced.InthefinalcombiningwiththespecificcircumstancesintheHongshiyancoalminetheplanusingthepre

11、ssurereliefgroovetocontrolthefloheaveofroadwayisputfward.Indertoverifytheeffectivenessoftheschemeweimplementedtheschemeofcontrollingfloheavebyusingthepressurereliefgrooveinthe12407airretainwaydecatedtheobservationstation