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1、第24卷第3期采礦與安全工程學報Vol.24No.32007年09月JournalofMining&SafetyEngineeringSep.2007文章編號:167323363(2007)0320340205半煤巖軟底巷道底鼓控制技術1234孫玉寧,周鴻超,周建榮,熊祖強(1.河南理工大學能源科學與工程學院,河南焦作454000;2.安全生產信息研究院,北京100029;3.魯泰煤業(yè)公司太平煤礦,山東濟寧273517;4.中國科學院武漢巖土力學研究所,湖北武漢430071)摘要:己15半煤巖軟底巷道底鼓一直是困擾

2、平煤集團三環(huán)公司的重大問題.以該巷道大范圍內的巖體為研究對象,通過對巷道底鼓影響因素的理論分析,得出圍巖性質、地質構造和支護形式是產生底鼓的主要因素,提出了錨注加固底板控制巷道底鼓的方案,并對其支護加固機理進行了研究分析.采用數(shù)值模擬軟件,對巷道使用普通錨網(wǎng)支護和錨注支護加固底板的圍巖變形破壞規(guī)律進行了數(shù)值模擬,對錨注加固底板前后圍巖的應力、位移及塑性區(qū)的變化情況進行了系統(tǒng)的分析.現(xiàn)場結果表明:錨注加固技術顯著提高了底板巖體的強度和承載能力,極大的提高了巷道的支護效果,有效的控制了半煤巖軟底巷道的底鼓變形.關鍵詞:

3、半煤巖軟底巷道;錨注支護;數(shù)值模擬;底鼓控制中圖分類號:TD313;TD353文獻標識碼: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