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《大斷面采動(dòng)影響煤巷錨索槽鋼梁桁架非對(duì)稱圍巖加固技術(shù)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、大斷面采動(dòng)影響煤巷錨索槽鋼梁桁架非對(duì)稱圍巖加固技術(shù)琚全室王紅勝于興建奎磊奎森林奎筮山西中煤華晉能源有限責(zé)任公司生產(chǎn)技術(shù)處西安科技大學(xué)能源學(xué)院教育部西部礦井幵采及災(zāi)害防治重點(diǎn)實(shí)驗(yàn)室摘要：為冇效控制大斷面采動(dòng)影響煤巷圍巖變形和實(shí)現(xiàn)支護(hù)結(jié)構(gòu)體在圍巖控制過(guò)程中的持續(xù)穩(wěn)定，提出丫錨索槽鋼梁桁架非對(duì)稱支護(hù)技術(shù)。首先，基于王家?guī)X煤礦20103工作而運(yùn)輸巷地質(zhì)條件，建立了錨索槽鋼梁桁架非對(duì)稱支護(hù)結(jié)構(gòu)力學(xué)模型，掌握了非對(duì)稱支護(hù)頂板彎矩分布規(guī)律，得到了頂板彎矩減小最大區(qū)域距窄煤柱幫2.4m處。其次，采用數(shù)值模擬分析方法對(duì)錨索
2、槽鋼梁桁架非對(duì)稱支護(hù)參數(shù)進(jìn)行了優(yōu)化，確定了桁架偏心距為500mm，錨索長(zhǎng)度為8m,桁架跨距為1.5m等關(guān)鍵參數(shù)。最后，在20103工作面運(yùn)輸巷開(kāi)展了工業(yè)性試驗(yàn)分析，工程應(yīng)用效果表明，在錨索槽鋼梁桁架非對(duì)稱加固下，巷道圍巖變形對(duì)采動(dòng)影響的敏感性減弱，巷道圍巖變形量較小，保障了20103工作面高強(qiáng)度安全高效回采。關(guān)鍵詞：人斷面;煤巷;錨索;槽鋼梁;桁架;非對(duì)稱支護(hù);作者簡(jiǎn)介：琚全宗（1964-）,男，江蘇吳縣人，工程師，E-mail:910125128@qq.com收稿日期：2017-04-25基金：國(guó)家重點(diǎn)
3、基礎(chǔ)研究計(jì)劃（973計(jì)劃）（2015CB251600）Cable-girder-trussasymmetricreinforcementtechnologyofthelargesectioncoalroadwayaffectedbyminingJUQuan-zongWANGHong-shengYUXing-jianLILeiLISen-1inLIBinProductionTechnologyDepartment,ChinaCoalHuajinEnergyCo.，Ltd.;CollegeofEnergySc
4、ienceandEngineering,Xi’anUniversityofScienceandTechnology;Abstract：Tocontrolthesurroundingrock’sdeformationoflargesectioncoalroadwayaffectedbyminingandtorealizethesustainablestabilityofthesupport’sstructuralmorphologyduringtheprocessofsurroundingrockcontr
5、olling,thecable-girder-trussasymmetricsupporttechnologywasproposed.Firstly,basedonthegeologicalconditionsoftheNo.20103coalfacetransportlaneinWangjialingcoalmine,thestructuralmechanicsmodelofthe“cable，U-barandbean”trussasymmetricsupportwasestablished,andth
6、edistributionregularityoftheroofbendingmomentwasobtained,andthedistancewas2.4inbetweenthemaximumdecreaseoftheroofbendingmomentandthenarrowcoalpillar.Secondly,theasymmetricsupportparameterswereoptimizedbythemethodofnumericalsimulation,andthetrusseccentrici
7、tywas500mm,andcablelengthwas8m,andthetruss’sspanwas1.5m.Finally,industrialtestanalysiswascarriedoutintheNo.20103coalfacetransportlane,andtheengineeringapplicationeffectshowsthatunderthe“cable,U-barandbean”trussasymmetricsupport,thedeformationofroadwaysurr
8、oundingrockbecomeslesssensitivetothemininginfluencewithlessdeformationintheroadwaysurroundingrocktoensuretheNo.20103coalfacewasminedintensivelyandeffectively.Keyword：largesection;coalroadway;anchorwire;beamchannel;t
