QUANTITATIVE STUDY OF GEOELECTRICAL PARAMETER RESPONSE TO GROUNDWATER SEEPAGE
LIU Jing1，2，LIU Shengdong1，2，CAO Yu3，YANG Shenglun3
(1. State Key Laboratory of Deep Geomechanics and Underground Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221008，China；2. School of Resources and Earth Science，China University of Mining and Technology，Xuzhou，Jiangsu 221008，China；3. Huizhou Institute of Subterranean Calamity，Hefei，Anhui 230088，China)
Abstract：Three kinds of experiments on water seepage were carried out，including homogeneous media physical simulation，heterogeneous media physical simulation and heterogeneous media simulation affected by mining. The regression analysis method has been used to study the relation between primary field current I and water injection Qi of the physical model. Field investigations，including geoelectrical detection and water yield measurement，have been conducted in a coal mine where a water flood disaster happened during this field work. And correlation analysis method has been used to study the relation between primary field current I and water yield Qo of the field detection area. Physical simulation experiments of steady seepage both in homogeneous and heterogeneous media have indicated that before water-saturated，there exists a linear relationship between the variables of I and Qi. Experiments of seepage in heterogeneous media affected by mining have indicated that the primary field current I presents the steady seepage characteristics，there still exists a linear relationship between I and Qi. That is to say，primary field current I mainly responds to the groundwater seepage process；while the response to rock breaking and fracturing is not that obvious. According to these conclusions，correlation analysis method has been used to analyze the field detection data；and the result shows that during the water flood period，there is a positive correlation between primary field current I and water yield of the detection area Qo. Therefore，trend of Qo can be predicted by the trend of I. Meanwhile，the electrodes with high correlations between I and Qo can help to locate the groundwater flow channels，which can support the resistivity analysis and interpretation.
2013, Vol. 32 
