直流电测深法在山西某煤矿第四系松散含水层精细探测中的应用  

Application of DC Electric Sounding in Quaternary Loose Aquifer Fine Exploration of a Shanxi Coalmine

作　　者：姜杰[1] Jiang Jie(Hubei Coal Geophysical Prospecting and Surveying Team,Wuhan,Hubei 430200)

机构地区：[1]湖北煤炭地质物探测量队,武汉430200

出　　处：《中国煤炭地质》2020年第9期74-78,共5页Coal Geology of China

摘　　要：山西某煤矿拟在其矿区内进行地球物理勘探,对工作区域内开采煤层上覆新近系、第四系松散岩类孔隙含水层的埋深及相对富水性进行评价,并查明基岩与新生界松散层界面。瞬变电磁法以其高效、对水敏感的特性,在山西煤矿的水文地质调查工作中得到了广泛应用;但该矿九采区内地面覆盖层较薄,局部基岩出露,瞬变电磁法勘探受其体积效应及浅部盲区影响,导致无法查明工作区域内基岩与新生界松散层界面。通过分析在该矿工作区域内应用直流电测深法实施地球物理勘探,采用合理的AB、MN电极距组合采集数据,并应用ρS参数及纵向电导S参数进行综合处理及解释,获得了丰富的浅地表地层地电信息,为矿方生产提供了可靠的浅部勘探成果。In a Shanxi coalmine proposed geophysical prospecting,the working coal seam overlying Tertiary and Quaternary loose bed porous aquifers buried depth and relative water yield property have been assessed,interface between bedrock and Cenozoic Group identified.The transient electromagnetic method(TEM)for its high efficiency and water sensitive features has been widely used in Shanxi coalmine hydrogeological exploration.But overburden of No.9 winning district is rather thin,bedrock outcropped locally,TEM prospecting limited by its volumetric effect and shallow blind zone impact caused no way to identify interface between bedrock and Cenozoic loose bed in working area.Through analysis has selected DC electric sounding to carry out prospecting in the area.With rational AB,MN electrode spacing combination,appliedρS parameter and longitudinal conductance S parameter carried out integrated processing and interpretation,acquired abundant shallow surface strata terrestrial electric information,thus provided reliable shallow part prospecting results for coalmine production.

关 键 词：电测深 浅部盲区 S值 ρS值 

分 类 号：TD163[矿业工程—矿山地质测量]