紅石巖煤礦回采巷道底鼓機理及防治技術研究.pdf

1、論文題目：紅石巖煤礦回采巷道底鼓機理及防治技術研究專業(yè)：采礦工程碩士生：李軍（簽名）指導教師：張恩強（簽名）摘要回采巷道底鼓防治是煤礦開采的難點問題之一，探索回采巷道的破壞機理及防治技術具有重要的理論意義和實用價值。本文通過現(xiàn)場觀測和理論分析對紅石巖煤礦回采巷道破壞機理及防治技術進行了系統(tǒng)研究?，F(xiàn)場觀測了12406回風順槽的變形破壞資料，得出回采巷道為軟巖回采巷道。12407回風順槽的底鼓原因主要是12406回采工作面的二次采動影響。1

2、2407回風順槽在12406回采工作面的影響下，兩幫應力較高，兩幫將應力傳遞到底板，底板巖層在巷道兩幫圍巖的高應力作用下被擠向巷道內部形成底鼓，鼓起的底板在兩幫形成向上的剪切應力，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型底鼓，造成底鼓的主要原因是兩幫應力較大和底板巖層較軟。得出回采巷道的底鼓機理是工作面二次采動影響之后，對回采巷道底鼓治理方案進行了系統(tǒng)研究，最終結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。為了驗證方案的有效性，利用卸壓槽治理底鼓的方案在12407回風順槽應用并在卸壓槽附近布置了測站進行觀測研究。監(jiān)測數(shù)據(jù)表明巷道頂板下沉量極小，巷道頂?shù)装逑鄬σ平恐饕傻装骞钠鹪斐?，相對移近量在距離工作面30~40m處開始加速增長，驗證了巷道底鼓機理是二次采動影響；通過有無卸壓槽的測量數(shù)據(jù)對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)。關鍵詞：軟巖

4、巷道；底鼓機理；卸壓槽；現(xiàn)場監(jiān)測研究類型：應用研究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