陽煤二礦厚煤層沿底巷道支護(hù)技術(shù)研究.pdf

1、論文題目：陽煤二礦厚煤層沿底巷道支護(hù)技術(shù)研究工程領(lǐng)域：礦業(yè)工程碩士生：王建軍（簽名）指導(dǎo)教師：索永錄（簽名）摘要陽煤二礦厚煤層沿底巷道經(jīng)常發(fā)生的頂板離層量大、錨索破斷，甚至冒頂?shù)葐栴}嚴(yán)重影響礦井安全生產(chǎn)。根據(jù)陽煤二礦21307工作面沿底回采巷道具體地質(zhì)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(chǎng)試驗(yàn)、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(guān)鍵影響因素是頂煤厚度；提出了巷道頂板高

2、預(yù)應(yīng)力強(qiáng)力錨索一次支護(hù)的技術(shù)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(yīng)力應(yīng)變的分布特征；分析認(rèn)為厚煤層沿底巷道的支護(hù)重點(diǎn)是頂板及肩角，在保證頂板有較大支護(hù)強(qiáng)度下，控制好兩幫的變形，并且隨著巷道頂煤厚度變化及時(shí)調(diào)整支護(hù)方法和支護(hù)強(qiáng)度是該類型巷道的支護(hù)策略；陽煤二礦21307工作面沿底回采巷道采用了頂板高預(yù)應(yīng)力全錨索支護(hù)、巷幫全錨桿支護(hù)工程實(shí)踐，現(xiàn)場(chǎng)觀測(cè)結(jié)果顯示巷道圍巖變形量小，錨桿錨索受力均勻，支護(hù)方案能滿足正常生產(chǎn)

3、要求。為相似地質(zhì)條件的巷道圍巖控制提供了借鑒經(jīng)驗(yàn)。關(guān)鍵詞：厚煤層沿底巷道；頂板失穩(wěn)；數(shù)值模擬；高預(yù)應(yīng)力研究類型：應(yīng)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