应用低频电磁法在采矿废弃场地进行地电特征调查

采用低频电磁法对一个采矿废弃场进行了浅层地层特征调查,检测土壤和地下水污染程度,探测出地下水污染分布情况,确定了地下水流污染扩散的路径,并且探测出该场地地下埋藏物的位置;通过分析地层的电导率特性,确定了地球物理异常区。研究结果表明,根据地下水污染分布情况,由南往北方向可将研究区分成污染区、过渡区和非污染区。这些结果有助于及时调整该采矿废弃场的污染管理措施,并确定新的环境监测井位。研究结果表明,电磁法对地下导体敏感,能够探测出与地下水有关的物理性质差异,精度高,适合进行环境监测。

THE APPLICATION OF FREQUENCY ELECTROMAGNETIC SURVEY TO THE INVESTIGATION OF GEOELECTRICAL FEATURES AT A MINING ABANDONED SITE

The frequency electromagnetic method was employed to investigate the geoelectrical features and map the extent of contamination at a mining abandoned site with the purpose of detecting the spread of groundwater and soil contamination, locating possible pathways of pollution and detecting the buried underground tanks. Based on an electrical conductivity analysis of the survey area, the authors delineated the geophysical anomaly zones. The results show that the frequency electromagnetic method technique is sensitive to conductive layers, has the capability of measuring small changes in subsurface properties in relation to underground water and is thus quite suitable for high-accuracy environmental monitoring.