資源描述:
《極軟巖回采巷道互補(bǔ)控制支護(hù)技術(shù)研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第28卷第12期姜耀東,等.極軟巖回采巷道互補(bǔ)控制支護(hù)技術(shù)研究?2391?極軟巖回采巷道互補(bǔ)控制支護(hù)技術(shù)研究姜耀東1,2,王宏偉2,趙毅鑫1,2,劉長(zhǎng)海3,朱喜東3(1.中國(guó)礦業(yè)大學(xué)煤炭資源與安全開(kāi)采國(guó)家重點(diǎn)實(shí)驗(yàn)室,北京100083;2.中國(guó)礦業(yè)大學(xué)力學(xué)與建筑工程學(xué)院,北京100083;3.鐵法煤業(yè)(集團(tuán))有限責(zé)任公司,遼寧調(diào)兵山112700)摘要:從加固破碎巖體和提高支護(hù)阻力兩方面綜合研究入手,分析小康煤礦巷道圍巖的力學(xué)及變形破壞特征,得出小康煤礦軟巖回采巷道圍巖失穩(wěn)機(jī)制,指出原有支護(hù)系統(tǒng)變形不協(xié)調(diào)、支護(hù)阻力低和沒(méi)有發(fā)
2、揮圍巖的承載能力是導(dǎo)致巷道破壞和支護(hù)失效的主要原因。以鐵法礦業(yè)集團(tuán)小康礦S2N8運(yùn)輸順槽為工程實(shí)例,研究高強(qiáng)度高預(yù)緊力錨桿、強(qiáng)力錨索、金屬網(wǎng)和噴漿加固以及U型鋼在控制圍巖變形中的互補(bǔ)作用,詳細(xì)介紹高強(qiáng)度、高預(yù)緊力錨網(wǎng)索配合U型鋼可縮支架的互補(bǔ)控制綜合支護(hù)方案并進(jìn)行現(xiàn)場(chǎng)工業(yè)試驗(yàn)。研究結(jié)果表明,互補(bǔ)控制支護(hù)技術(shù)能夠避免極軟巖回采巷道的多次翻修,實(shí)現(xiàn)支護(hù)一次到位。關(guān)鍵詞:巖石力學(xué);軟巖;預(yù)緊力;互補(bǔ)控制;失穩(wěn)機(jī)制中圖分類號(hào):TU45文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1000–6915(2009)12–2383–08STUDYOFCOMP
3、LEMENTARYSUPPORTINGTECHNOLOGYOFEXTREMELYSOFTROCKMININGROADWAYJIANGYaodong1,2,WANGHongwei2,ZHAOYixin1,2,LIUChanghai3,ZHUXidong3(1.StateKeyLaboratoryofCoalResourcesandSafeMining,ChinaUniversityofMiningandTechnology,Beijing100083,China;2.SchoolofMechanics,Architectu
4、reandCivilEngineering,ChinaUniversityofMiningandTechnology,Beijing100083,China;3.TiefaCoalIndustryGroupCo.,Ltd.,Diaobingshan,Liaoning112700,China)Abstract:Byusingthemethodofstrengtheningbrokenrockandincreasingsupportingresistance,themechanicalproperties,deformati
5、onandfailurecharacteristicsofsurroundingrocksinXiaokangcoalmineareanalyzed.Meanwhile,theinstabilitymechanismofsoftrockminingroadwayisobtainedanditispointedoutthatthemainreasonsofsupportingfailureareinconsistentdeformation,lowsupportingresistanceandfailuretoutiliz
6、ethesupportingcapabilityofthesurroundingrocks.TakingtheS2N8haulageroadwayofXiaokangcoalmineforexample,thecomplementarityofthehighstrengthbolt,highpretensioncable,metalmeshandU-shapedcontractibleframeintheprocessofreinforcingsurroundingrockisstudied.Basedonthesest
7、udies,thecomplementarysupportingtechnologyofhighstrengthandpretensionbolt-mesh-cablesupportingtogetherwithU-shapedcontractibleframeisintroduced.Inaddition,in-situindustrialtesthasalsobeenimplemented;andtheresultsshowthatthecomplementarysupportingsystemcansuccessf
8、ullyavoidthemulti-rebuildinginextremelysoftrockminingroadwayandthesupportingonceforallinXiaokangcoalminecanbeadopted.Keywords:rockmechanics;softrock;pretension