EH4双源电磁法探查高速公路采空区的研究

EH4双源电磁法探查高速公路采空区的研究王玉和，程久龙，周勇，姜国庆山东科技大学矿山灾害预防控制教育部重点实验室中国青岛266510摘要高速公路通过煤矿采空区时，要了解采空区的深度、分布和稳定情况，中深部采空区的探测是个难点。本文应用双源电磁勘探方法对青兰高速莱芜段拟经过区域采空区的分布和稳定情况进行勘察。对双源电磁勘探方法野外数据采集技术,资料处理和解释技术进行研究，分析了采空区电阻率异常特征,探明了采空区的形态、分布和埋深,并对采空区的稳定情况进行了评价。双源电磁勘探方法效果的好坏主要取决于发收距的选择、极距的选择，采样时间及其他技术参数的选择，如根据测区地层的情况和采煤方法确定测线布置、最小和最大探测深度。进行解释时，必须掌握测区可能出现的地层，采空区和围岩所处的电阻率范围，这至关重要。关键词高速公路采空区；EH4双源电磁勘探方法；电阻率异常特征；采空区稳定性分类号P631文献标识码AResearchontheEH4Double-SourceElectromagneticProspectingMethodontheExpresswayRoadThreatenbyMined-OutAreaWangYuhe,ChengJiulong,ZhouYong,JiangGuoqingKeyLaboratoryofMineDisasterPreventionandControl,ShandongUniversityofScienceandTechnology,Qingdao,266510,ChinaAbstract:Whenexpresswaypassesthroughmined-outareaofcoalmine,thedepth,distributionandstabilityofmined-outareashouldbeascertained,thedetectionofmediumanddeepmined-outareaisadifficulty.Inthispaperthedoublesourceelectromagneticprospectingmethodwasusedtodetectthedistributionandstabilityofmined-outareaundertheplanningLaiwusectionofQingdaotoLanzhouexpressway.Thefielddataacquisition,dataprocessingandinterpretationtechnologyofdouble-sourceelectromagneticprospectingmethodwereresearched,resistivityabnormalfeaturesofmined-outareawereanalyzed,theform,distributionanddepthofmined-outareawereascertained,andthestabilitywasevaluated.Theprospectingeffectofdouble-sourceelectromagneticprospectingmethodrestswiththechoicesofdistancebetweentransmitterandreceiver,polardistance,samplingtimeandothertechnicalparameters,forexample,toascertainthesurveylinelayout,minimumandmaximumexploratorydepthonthebasisofstratuminsurveyareaandminingmethod.Itistobeveryimportantofholdingthepotentialstratumandgraspingtheresistivityconfineofmined-outareaandsurroundingrocksduringdatainterpretation.Keywords:mined-outareaunderexpressway;EH4double-sourceelectromagneticprospectingmethod;abnormalfeaturesofresistivity;stabilityofmined-outarea收稿日期：基金项目：国家自然科学基金资助（50774051,50974081）作者简介：王玉和（1971-），男，河南信阳人，副教授，工学硕士，主要从事交通安全监测与预防控制、地基路基检测评价等方面的研究工作。