平煤股份八矿二1煤底板灰岩地热水疏水降压技术

第42卷第1期煤田地质与勘探Vol.42No.12014年2月COALGEOLOGY&EXPLORATIONFeb.2014收稿日期:2013-02-07基金项目:国家自然科学基金项目(41272250)作者简介:(1963).文章编号:1001-1986(2014)01-0053-04平煤股份八矿二1煤底板灰岩地热水疏水降压技术王心义1,2，王麒3，陈国胜2(1.河南理工大学资源与环境学院，河南焦作454000；2.中国平煤神马集团研究院，河南平顶山467000；3.中国科学院大学地球科学学院，北京100049):疏水降压是降低煤层底板厚层灰岩含水层水害威胁的最常用方法之一。针对平煤股份八矿二1煤底板寒武灰岩水压高、地下水温度高且富水性分布不均一的特点，根据地质构造、隔水层、含水层、水动力场、水温度场、水化学温标、瞬变电磁和直流电法勘探等综合探查信息，分析了寒武灰岩含水层地热水的埋藏和分布规律，并划定了富水异常区；结合计算的含水层疏水降压影响半径，在西大巷底板布置了7眼寒武灰岩地热水疏水降压孔，7眼疏水孔总涌水量300m3/h，277d内，西大巷寒武灰岩水位共下降17.2m，西大巷内空气温度降低2℃；涌出的50℃地热水提至地表可供综合利用。：寒武灰岩地热水，富水异常区，疏水降压，综合利用：TD74P641：ADOI:10.3969/j.issn.1001-1986.2014.01.012ThedrainageanddecreasingpressuretechnologyoflimestonegeothermalwaterincoalfloorbasedoncomplexdetectiveinformationWANGXinyi1,2,WANGQi3,CHENGuosheng2(1.InstituteofResources&Environment,HenanPolytechnicUniversity,Jiaozuo454000,China;2.InstituteofChinaPingmeiShenmaGroup,Pingdingshan467000,China;3.CollegeofEarthScience,UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Depressurizationbydewateringisoneofthemostcommenmethodstomitigatewaterhazardfromaquifersun-derseamfloor.ForthecharacteristicsofCambrianlimestonewaterhigh-pressure,groundwaterhigh-temperatureandwater-richheterogeneousdistributionsin2-1coalfloorofPingmeiNo.8Mine,basedoncomplexdetectiveinformationfromgeologicalstructure,confiningbed,aquifer,hydro-dynamicfield,hydro-temperaturefield,hydro-chemicaltem-peraturescale,transientelectromagneticmethodandDCelectricalmethod,distributionlawandgeothermalwaterdepthofCambrianlimestoneaquiferarediscussedandanomalyareaswithrichwateraredelimited.Combinedcalcu-lated-radiusofinfluenceindrainageanddecreasingpressureofaquifer,7wellswithdepthof150minthisaquiferarearrangedincoalfloorofwestmainroadway,thetotalwateryieldofthesedrainagewellsamountto300m3/handthemeasurecausesthatwaterlevelofCambrianlimestoneareloweredby17.2mduring277days,andthatatmospheretemperaturealsodropped2inwestmainroadway.50℃℃geothermalwatercanbeusedcomprehensivelyafterliftingtosurface.Keywords:Cambrianlimestonegeothermalwater;water-richanomalyarea;drainageanddecreasingpressure;comprehensiveutilization1()1[1-2]1L7170m90mL7−300m1−800m1L70.06MPa/m[3]40℃·54·煤田地质与勘探第42卷36℃1[4-6][7-9]1地质信息1.1NWW3001~2m(1)1Fig.1ThetectonicmapofNo.8mine1(814m)11.2321(2)1212水文地质信息2.1121Fig.2Thicknesscontoursfromthebottomofseam2-1totopofCambrianlimestone300m420m8m2.27~26.62L/(s·m)420m0.00203~0.894L/(s·m)2.2(3)3(20085)Fig.3ContoursofwaterlevelofCambrianlimestoneinNo.8mine3水温度场信息3.466/℃hm41第1期王心义等:平煤股份八矿二1煤底板灰岩地热水疏水降压技术·55·4Fig.4ContoursofgeothermalgradientinPingdingshangcoalfield14水化学温标信息[10-12]SiO2——21309273.155.19logSiOtρ=−−()tZ()00/ZttZθ=−+t017.2℃θ3.466/℃hmZ025m(1)1464.7m(−1364.7m)70℃表1热储温度及循环深度Table1Temperatureandcyclingdepthofgeothermalreservoir/mρ(SiO2)/(mg·L−1)/℃/m−27520.8064.921401.8−31820.8064.921401.8−43020.8064.921401.8−30724.0070.441561.1−43022.0067.061463.5−69323.7169.961547.222.0267.101464.75地球物理勘探信息[13-16]80~150m2900m+121m−693m13m80m2320m10m2952320m60m140m2601140~210m330~385m505~588m690~760m815~865m1300~1400m1998~2060m6疏水降压孔配置6.110RSK=Km/dSmRm0.01313m/d−300.86m1−690m−773m1472.14m(4.50MPa)120m63m0.06MPa/m3.78MPa(396.90m)S75.24m86.21m()172.42m2900m7160m350m560m740m855m1320m2010m6.2[17]150m216mm83m5m(88m)152mm·56·煤田地质与勘探第42卷62m(150m)0~88m175mm7效果分析7300m3/h42.86m3/h277d17.2m2℃74%50℃8结论894m160m350m560m740m855m1320m2010m70℃7300m3/h50℃参考文献[1].[S].2009.[2].[M].2011.[3].[J].201240(4)60−62.[4].[J].201136(1)101−104.[5].WFLSLGF1900IV12303[J].2011(5)47−48.[6].[J].201139(5)55−58.[7]HEManchaoCAOXiulingXIEQiaoetal.Principlesandtechnologyforstepwiseutilizationofresourcesformitigatingdeepmineheathazards[J].MiningScienceandTechnology2010(1)20−27.[8].[J].200833(1)63−66.[9]YANGXiaojieHANQiaoyunPANGJiewenetal.Progressofheat-hazardtreatmentindeepmines[J].MiningScienceandTechnology(china)2011(2)295−299.[10].[J].201032(3)98−101.[11]旸.[M].1993.[12].[J].201038(1)58−61.[13].[J].201035(4)635−639.[14]燚.[J].20118(1)6−9.[15].[J].201139(5)72−75.[16].[J].201240(3)70−73.[17].[J].201240(3)62−65.安监总局发布《煤炭地质工作规定》()“”“”///20143119831119845