陽煤二礦厚煤層沿底巷道支護技術研究.pdf

1、論文題目：陽煤二礦厚煤層沿底巷道支護技術研究工程領域：礦業(yè)工程碩士生：王建軍（簽名）指導教師：索永錄（簽名）摘要陽煤二礦厚煤層沿底巷道經常發(fā)生的頂板離層量大、錨索破斷，甚至冒頂?shù)葐栴}嚴重影響礦井安全生產。根據(jù)陽煤二礦21307工作面沿底回采巷道具體地質條件，以“大部分回采巷段頂煤厚度為3.5m”作為研究的典型條件，通過現(xiàn)場試驗、理論分析和數(shù)值模擬等多種研究手段，通過分析得出厚煤層沿底巷道頂板失穩(wěn)的關鍵影響因素是頂煤厚度；提出了巷道頂板高

2、預應力強力錨索一次支護的技術方案；通過FLAC3D分析在不同頂煤厚度下的厚煤層沿底巷道圍巖應力應變的分布特征；分析認為厚煤層沿底巷道的支護重點是頂板及肩角，在保證頂板有較大支護強度下，控制好兩幫的變形，并且隨著巷道頂煤厚度變化及時調整支護方法和支護強度是該類型巷道的支護策略；陽煤二礦21307工作面沿底回采巷道采用了頂板高預應力全錨索支護、巷幫全錨桿支護工程實踐，現(xiàn)場觀測結果顯示巷道圍巖變形量小，錨桿錨索受力均勻，支護方案能滿足正常生產

3、要求。為相似地質條件的巷道圍巖控制提供了借鑒經驗。關鍵詞：厚煤層沿底巷道；頂板失穩(wěn)；數(shù)值模擬；高預應力研究類型：應用研究Subject：ResearchonSupptingTechnologyofRoadwayarrangedAlongBottominThickCoalSeaminYangmeiSecondCoalMineSpecialty：MiningEngineeringName：WangJianJun（Signature）Inst

4、ruct:SuoYongLu（Signature）ABSTRACTYangquanCoalMinethickcoalseamalongthebottomofthegalleryoftenoccurlargeamountofroofseparationcablebreakingevencaveotherproblemsseriouslyaffectthesafetyinproductionofcoalmine.Accdingtothesp

5、ecificgologicalconditoinsoftheYangmeisecondcoalmine21307wkingfacealongthebuttomoftheroadwaytaking“mostofthecoalseamthicknessis3.5minroofoftheentry“asatypicalresearchconditionthroughtheeticalanalysisnumericalsimulationfie

6、ldtrialothercomprehensiveresearchmeansanalysisofthetopcoalthicknessisthekeyinfluencefthickseamalongthebottomofthegallery’sroofinstabilityputfwardthedisposablesupptingtechnologyofhighprestressanchcableinroadwayroofUsedFLA

7、C3dsimulationthestressstraindistributionofsurroundingrockinthickcoalseamwithdifferenttopcoalthicknessitisconsideredthatthesupptofthickcoalseamalongthebottomoftheroadwayistherooftheconer1ofshoulderundertheconditionofensur

8、eingtheroofhasalargesupptstrengthcontrolthedefmationofbothsideoftheroadwayadjustingthesupptingmethodsupptingstrengthissupptstrategyfthistypeofroadwaywiththechangeofthethicknessYangmeisecondcoalmine21307wkingfacealongtheb

9、ottomoftheminingroadwayusedtheroofhighprestressedallanchcablesupptroadwaysupptfthewholerockboltsinengineeringpractice.Fieldobservationresultsshowthatsurroundingrockdefmationissmallstressunifmityintheanchanchcablesuppting