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时间:2020-03-25
《基于工作面顶板疏放水的含水层水力联系研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、Vol42No5矿业安全与环保第42卷第5期Oct2015MININGSAFETY&ENVIRONMENTALPROTECTION2015年10月杨建,赵彩凤.基于工作面顶板疏放水的含水层水力联系研究[J].矿业安全与环保,2015,42(5):84-86.文章编号:1008-4495(2015)05-0084-03基于工作面顶板疏放水的含水层水力联系研究1,21杨建,赵彩凤(1.中煤科工集团西安研究院有限公司,陕西西安710054;2.陕西省煤矿水害防治技术重点实验室,陕西西安710054)摘要:为了弄清蒙陕接壤区深埋煤层某矿井白
2、垩系志丹群与3-1煤层顶板含水层之间的水力联系情况,在首采工作面顶板疏放水过程中,开展了大气降水、含水层水位和水化学变化等方面的研究,结3果表明:通过对首采工作面顶板水提前疏放,使切眼附近钻孔涌水量降至3~5m/h,水压降至10MPa左右,形成了较稳定的降落漏斗。在疏放水过程中,志丹群含水层水位基本保持稳定,3-1煤层顶板含水层水位则下降明显;志丹群与3-1煤层顶板含水层水在矿化度、水化学类型等方面差异明显,且放水过程中水化学特征基本不变,表明志丹群低矿化度水未进入3-1煤层顶板含水层。安定—直罗组地层未发育沟通上下含水层的导水通道,志
3、丹群与3-1煤层顶板含水层之间水力联系较差,为矿井安全生产提供了必要的地质保障。关键词:水力联系;含水层疏放;煤层顶板;工作面;水化学特征中图分类号:TD714文献标志码:B网络出版时间:2015-10-0815:29网络出版地址:http://www.cnki.net/kcms/detail/50.1062.td.20151008.1529.058.htmlResearchonHydraulicConnectionofAquifersBasedonRoofDewateringandDrainageinWorkingFace1,21YAN
4、GJian,ZHAOCaifeng(1.ChinaCoalTechnologyandEngineeringGroupXi’anResearchInstitute,Xi’an710054,China;2.ShaanxiKeyLaboratoryofCoalMineWaterHazardPreventionandControl,Xi’an710054,China)Abstract:InordertomakeclearthehydraulicconnectionbetweenCretaceousaquiferandNo3-1coalseamr
5、oofaquiferinacoalmineinthecontiguousareaofShaanxiandInnerMongolia,studywascarriedoutontheatmosphericrainfall,thewaterlevelofaquiferandthehydro-chemicalvariationintheprocessofroofdewateringanddrainageinthefirst-miningface.The3resultsshowedthattheadvancedroofdewateringinthe
6、first-miningmadethewaterinflownearthestartingcutdropto3~5m/handthegroundwaterpressurereducetoabout10MPaandfinallyastablegroundwaterdepressionconewasformed.Intheprocessofdewateringanddrainage,thewaterleveloftheCretaceousaquiferbasicallykeptsteady,whilethewaterlevelofNo3-
7、1coalseamroofaquiferdroppedobviously.Thereweregreatdifferencesinmineralizationdegreeandhydro-chemicaltypesbetweenCretaceousaquiferandNo3-1coalseamroofaquifer,buttheirhydro-chemicalcharacteristicsbasicallykeptsteadyintheprocessofdewatering,whichindicatedthatthelowminerali
8、zedwaterinCretaceousaquiferdidnotinfiltrateintoNo3-1coalseamroofaquifer.TheAnding-Zhiluoformati
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