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1、第24卷第3期采矿与安全工程学报Vol.24No.32007年09月JournalofMining&SafetyEngineeringSep.2007文章编号:167323363(2007)0320340205半煤岩软底巷道底鼓控制技术1234孙玉宁,周鸿超,周建荣,熊祖强(1.河南理工大学能源科学与工程学院,河南焦作454000;2.安全生产信息研究院,北京100029;3.鲁泰煤业公司太平煤矿,山东济宁273517;4.中国科学院武汉岩土力学研究所,湖北武汉430071)摘要:己15半煤岩软底巷道底鼓一直是困扰
2、平煤集团三环公司的重大问题.以该巷道大范围内的岩体为研究对象,通过对巷道底鼓影响因素的理论分析,得出围岩性质、地质构造和支护形式是产生底鼓的主要因素,提出了锚注加固底板控制巷道底鼓的方案,并对其支护加固机理进行了研究分析.采用数值模拟软件,对巷道使用普通锚网支护和锚注支护加固底板的围岩变形破坏规律进行了数值模拟,对锚注加固底板前后围岩的应力、位移及塑性区的变化情况进行了系统的分析.现场结果表明:锚注加固技术显著提高了底板岩体的强度和承载能力,极大的提高了巷道的支护效果,有效的控制了半煤岩软底巷道的底鼓变形.关键词:
3、半煤岩软底巷道;锚注支护;数值模拟;底鼓控制中图分类号:TD313;TD353文献标识码:AControlTechniqueofFloorHeaveinSemiCoalandRockRoadwaywithWeakFloor1234SUNYu2ning,ZHOUHong2chao,ZHOUJian2rong,XIONGZu2qiang(1.SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo,Henan454000,China;2
4、.NationalInstituteforOccupationalSafety,Beijing100029,China;3.TaipingMine,LutaiCoalCo.Ltd.,Jining,Shandong273517,China;4.InstituteofRockandSoilMechanics,ChinaAcademyofScience,Wuhan,Hubei430071,China)Abstract:Formanyyears,thefloorheaveofJi215semicoalandrockroad
5、wayhasbeenaseri2ousproblempuzzlingthe3rdcoalmineofPingdingshanCoalIndustryGroupCo.Ltd.Aimingatalargeareaofrockmassaroundtheroadway,thefactorsaffectingthefloorheavewereana2lyzed,showingthatthephysicalpropertiesofsurroundingrockandthegeologicalstructureandsuppor
6、tformarethemainfactorsforfloorheave.Withtherecognitionofthemechanismofthefloorheave,aneffectivebolt2groutingsupporttechniquewasstudiedanddesignedtocontrolthefloorheave.Byusingthenumericalsimulationsoftware,thedeformationandfailurerulesofbolt2meshsupportandbolt
7、2groutingsupportforroadwayweresimulated,theplasticzone,thestressesdistributionfield,andthedisplacementvectoraroundtheroadwayinthesetwosit2uationswerealsoanalyzedindetail.Thein2situmeasurementshowsthatthestrengthandbearingcapacityofcoalseamfloorforbolt2grouting
8、roadwayaregreatlyincreased,goodsup2porteffectsachieved.therefore,thedeformationofthefloorheaveofroadwaycanbecon2trolledeffectively.Keywords:semicoalandrockroadwaywithweakfloor;bolt
