联合剖面法和三极电测深法在找水勘探中的综合应用.pdf

龙源期刊网http://www.qikan.com.cn联合剖面法和三极电测深法在找水勘探中的综合应用作者：李水新等来源：《南水北调与水利科技》2014年第05期摘要：为改善山东泰安市岱岳区北部下港乡的饮水条件，运用视电阻率联合剖面法分析了研究区低电阻率的异常特征，推测出低阻正交点异常与小型裂隙发育有关，从而确定NNE向异常体为裂隙破碎带；在此基础上通过三极电测深法分析了低阻“U型”异常特征，推测出以530/3测点为中心的地下水富集区，确定深度70～250m基岩裂隙发育，富水性强，水量丰富；最终选择530/3测点为孔位点，同时对其进行成井施工探水，最终孔深为194m，涌水量为168m3/d。研究结果不仅解决了用水问题，同时证明综合电法是一种可行、有效的找水勘探手段。关键词：联合剖面法；三极电测深法；电法勘探；地下水；低电阻率异常特征中图分类号：P631.3文献标志码：A文章编号：16721683（2014）05013803IntegratedapplicationofcombinedprofilesmethodandtrielectrodesoundingmethodingroundwaterexplorationLIShuixin1，YANZhiwei1，SUChuntian2，PANXiaodong2，LIZhaolin2，TANGJiansheng2（1.GuilinUniversityofTechnology，GuangxiscientificExperimentCenterofMining，MetallurgyandEnvironment，Guilin541004，China；2.InstituteofKarstGeology，CAGS，Guilin541004，China）Abstract：InordertoimprovethedrinkingwaterconditionsofXiagangvillageinthenorthofDaiyuedistrictofTaiancityofShandongProvince，theabnormalcharacteristicsoflowerresistivitywereanalyzedusingtheapparentresistivitycombinedprofilesmethodinthispaper.Theresultsshowedthatthefracturedevelopmentisrelatedtotheabnormalcharacteristicsoflowresistancepointofintersection，whichcandeterminethefissurecrushedzonewithNNEdirection.Onthebasis，theabnormalcharacteristicsoflowerresistivityUtypewereanalyzedusingthetrielectrodesoundingmethod，whichspeculatesthegroundwaterrichareaincenterpointof530/3andsuggeststhatbedrockfissuredevelopsatthedepthof70to250meters.Finally，thepointof530/3wasusedasthedrillingpoint，andgeophysicalexplorationwasperformedtodeterminethatthepointis194metersdeepandhasanaveragedailywaterproductionof168m3.Thestudynotonlysolvesthewatersupply龙源期刊网http://www.qikan.com.cnproblem，butalsoprovesthattheintegratedelectricmethodisapracticalandeffectivewayforgroundwaterexploration.Keywords：combinedprofilesmethod；trielectrodesoundingmethod；electricalexploration；groundwater；abnormalcharacteristicsoflowresistivity随着地球物理科学技术的发展，电法勘探[12]在地下水资源勘查中发挥了重要作用，为打井找水指明了方向，同时提高地下水勘探效率。研究表明[310]，电法勘探的组合可以有效地提高打井找水的成井率，例如卞兆津等[7]在湖南湘乡盆地红层地区通过联合剖面法、激发极化法成功地判断出相对富水带；焦彦