陕北浅埋煤层采空区积水下安全开采技术研究

第43卷第6期煤田地质与勘探Vol.43No.62015年12月COALGEOLOGY&EXPLORATIONDec.2015收稿日期:2015-01-27基金项目:(41402265)(2014JM2-5064)作者简介:(1969—)[e-mail]引用格式:.[J].201543(6)60–64.文章编号:1001-1986(2015)06-0060-05陕北浅埋煤层采空区积水下安全开采技术研究张立其1，刘洋2，方刚2(1.鄂尔多斯煤炭局，内蒙古鄂尔多斯017000；2.中煤科工集团西安研究院有限公司，陕西西安710077):浅埋煤层上覆采空区水威胁着陕北地区诸多煤矿的安全生产。以陕北地区某煤矿为例，针对该类水害问题进行分析，通过经验公式、数值模拟等方法计算，开采3–1号煤层产生的覆岩导水裂缝带高度至少为66m，运用类比法及经验公式预计，矿井正常涌水量为163m3/h，最大涌水量203m3/h，3–1号煤层上覆采空区积水量约为2.6×106m3。根据各计算结果，提出“物探先行、钻探验排、先治后采、有掘必探”的安全开采技术方案和思路，为矿井后期制定合理有效的煤层顶板采空区水综合防治措施打好基础。：浅埋煤层；采空区积水；导水裂缝带；矿井水量；安全开采：TD741：ADOI:10.3969/j.issn.1001-1986.2015.06.012ResearchonsafeminingtechnologyforshallowburiedcoalseamunderthegoafwaterinnorthernShaanxiProvinceZHANGLiqi1,LIUYang2,FANGGang2(1.OrdosCoalBoard,Ordos017000,China;2.Xi′anResearchInstitute,ChinaCoalTechnologyandEngineeringGroupCorp,Xi′an710077,China)Abstract:GoafwateraboveshallowcoalseamsisthreateningthesafeproductioninmanycoalminesinnorthShaanxiProvince.Thepaper,takingamineinnorthShaanxiProvinceasanexample,aimingatsuchkindofwaterhazards,throughusingempiricalformula,numericalsimulation,conductedanalysis,calculatedthatthewa-ter-conductingheightintheoverlyingrockduetominingseam3–1wasatleast66m.Usinganalogymethodandempiricalformula,itwaspredictedthatthenormalmineinflowwas163m3/h,themaximummineinflow203m3/h,theaccumulatedgoafwateraboveseam3–1about2.6106m3.Accordingtothecalculationresults,thetechnicalschemeandideaforsafeminingwereputforward,thatis,geophysicalprospectinggoesfirst,drillingverifiesthedrainage,controlisfollowedbymining,detectionmustbecarriedoutbeforeanyexcavation,layingthefoundationforformulatingeffectiveandreasonablecomprehensivecontrolmeasuresofgoalwaterintheroofofseam.Keywords:shallowcoalseam;goafwater;water-conductingfracturedzone;minewateryield;safemining[1-2]1概况3~4km4.7~5.1km2.1~3.0km12.42km24第6期张立其等:陕北浅埋煤层采空区积水下安全开采技术研究·61·1–21–22–23–14–21–21–21–21–22–22-23–11–22–229m2–21–23–12–237m3–12.65m2–23–12–23–1121–22–23–12覆岩导水裂缝带高度预计()[3-4]2.1[5-6]2a.1Fig.1Mineformationdiagram2Fig.2Hydrogeologicalsection1005.13.33.8liMHn=++(1)Mn5.11002.655.142.42m3.313.8liH´=+=´+·62·煤田地质与勘探第43卷16b.1005.61.63.6liMHM=++åå(2)Må5.61002.655.639.40m1.62.653.6liH´=+=´+14.872.2F-RFPA2D200m160m1237500(3)5m20100m3–14m(tensilecut–off)3Fig.3Thenumericalsimulationofmechanicsmodel5~10m35~40m10~15m5m69.20m262.33–1“”2–22(8G1)7.46m110.11m24.9(2–24.43m)2.424.93–166m24.9(3140131.93~34.98)3–1“”3矿井水量预计3.12012–2014(4)135.0~190.6m3/h157m³/h第6期张立其等:陕北浅埋煤层采空区积水下安全开采技术研究·63·42012–2014Fig.4Minewaterinflowof2012–2014years3.2000SFQQSF=⋅⋅(3)QQ0m3/hSS0mFF0km2163m3/h203m3/h[7]3.3Q=KMS/cosα(4)Qm3MmSm2α(°)KMSαK0.25~0.5K[5]KHKHK=1H/M(5)2–23–12.6×106m33–143–1“”[8-9]4a.b.[10-11]c.3–1160~180md.5结语a.·64·煤田地质与勘探第43卷b.3–124.966mc.162.54m3/h203.18m3/h3–12.6×106m3d.“”参考文献[1].[J].200735(5)34–37.[2].[J].201341(1)25–29.[3].[J].199823(3)262–266.[4].[M].2009.[5].[S].2011.[6].[S].2009.[7].[J].201022(6)31–34.[8].[J].200432(12)23–26.[9].[J].20146(23)79–82.[10].[J].2006(4)132–134.[11].[M].1998.(责任编辑张宏)ZDY3500LP20151139“”“ZDY3500LP”“”3“”15%30%1881m“ZDY3500LP”“”7(梅新)