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时间:2019-02-27
《锚杆支护巷道巷旁锚索加强支护沿空留巷围岩控制机理研究及应用》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第24卷第12期岩石力学与工程学报Vol.24No.122005年6月ChineseJournalofRockMechanicsandEngineeringJune,2005锚杆支护巷道巷旁锚索加强支护沿空留巷围岩控制机理研究及应用1,234华心祝,马俊枫,许庭教(1.安徽理工大学资源开发与管理工程系,安徽淮南232001;2.中国矿业大学(北京校区)资源与安全工程学院,北京100083;3.蚌埠坦克学院,安徽蚌埠233013;4.淮北矿业集团朱庄煤矿,安徽淮北235047)摘要:沿空留巷技术在薄、中厚煤层中应用较多,但在3m以上较大采高工作面中应用极少,究其主要原因是已往建立的沿空留巷力
2、学模型欠妥、巷内与巷旁支护方式不合理。从如何提高岩层的自我承载能力入手,提出了一种主动的巷旁加强支护方式——巷旁采用锚索加强支护,巷内采用锚杆支护。建立了考虑巷帮煤体承载作用和巷旁锚索加强作用的沿空留巷力学模型,并分析了巷内锚杆支护和巷旁锚索加强支护的作用机理。利用理论分析所得结论,对淮北朱庄矿3625较大采高工作面风巷进行巷旁支护设计及工程实践。研究成果为较大采高工作面沿空留巷技术提供了理论依据和借鉴经验。关键词:采矿工程;沿空留巷;围岩控制机理;巷旁锚索加强支护;锚杆支护;巷帮煤体中图分类号:TD322文献标识码:A文章编号:1000–6915(2005)12–2107–06STUDY
3、ONCONTROLLINGMECHANISMOFSURROUNDINGROCKSOFGOB-SIDEENTRYWITHCOMBINATIONOFROADSIDEREINFORCEDCABLESUPPORTINGANDROADWAYBOLTSUPPORTING,ANDITSAPPLICATION1,234HUAXin-zhu,MAJun-feng,XUTing-jiao(1.DepartmentofResourcesExploitationandManagement,AnhuiUniversityofScienceandTechnology,Huainan232001,China;2.Dep
4、artmentofResourcesandSafetyEngineering,ChinaUniversityofMiningandTechnology,Beijing100083,China;3.BengbuTankInstituteofPLA,Bengbu233013,China;4.ZhuzhuangCoalMine,HuaibeiMiningGroupCorporation,Huaibei235047,China)Abstract:Thegob-sideentryretainingtechnologyiswidelyusedinthethinormediumthickcoalseam
5、,butrarelyemployedintheover-3-metermining-heightworkingface.Thereasonsmainlylieinthefollowingtwoaspects:firstly,thetraditionalmechanicalmodelforthegob-sideentryisunsatisfactoryandsecondly,theroadwayandroadsidesupportsareunreasonablyplaced.Bytakingintoconsiderationofthebearingcapacityofrocks,thispa
6、perpresentsareinforcedactivesupportingtechnique,consistingofthecable-reinforcedroadsidesupportingtechniqueandtheroadwaybolt-supportingtechnique.Forpracticalpurpose,anewmechanicalmodelisestablished,takingintoaccountboththeroadsidecoalbearingcapacityandthereinforcingeffectsoftheroadsidecable-support
7、.Theimprovedsupportingmechanismwiththecombinationoftheroadwaybolt-supportingtechnologyandthereinforcedroadsidecablesupportingtechnologyisanalyzed.Theresultsareappliedsuccessfullytothedesignandengineeringpracticei
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