EXPERIMENTAL RESEARCH ON MINE ROOF WATER-INRUSH BASED ON RESPONSE OF GEOELECTRIC FIELD TO GROUNDWATER SEEPAGE
YANG Cai1,2, LIU Sheng-dong1,2, HU Ze-an1,2
1. State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221008, China;
2. School of Resources and Earth Sciences, China University of Mining and Technology, Xuzhou 221008, China
Abstract：Through the establishment of the model for groundwater seepage-electric test, mine roof water-inrush was simulated and coarse-grained sand, medium-grained sand and fine-grained sand were partly used as aquifer media. The properties of transient response of parameters of the geoelectric field are real time monitored by network parallel electrical equipment. Through analyzing the variation curves of spontaneous potential, exciting voltage and exciting current with time and the pictures of apparent resistivity with time, the authors have found that the experiments on three different kinds of aquifer media show apparent response and basically have the same regularity. In the process of water-inrush, the spontaneous potential of coarse sand and medium sand are significantly lower than that of the two stages before and after water-inrush. The spontaneous potential of fine sand keeps growing and shows significant changes in the water-inrush point. And the exciting voltage and exciting current keep the same changes. Compared with the stages before and after water-inrush, the exciting voltage shows great reduction and the exciting current shows dramatic rise. The apparent resistivity section diagram can clearly show the change process at seepage, water-inrush and post-water-inrush stages, which can be applied to judge the water capacity of aquifer. The study is of practical significance for the study of mine flood forecast and prevention.
杨彩, 刘盛东, 胡泽安. 基于地电场响应的矿井顶板突水模拟实验[J]. 物探与化探, 2012, 36(2): 220-223.
YANG Cai, LIU Sheng-dong, HU Ze-an. EXPERIMENTAL RESEARCH ON MINE ROOF WATER-INRUSH BASED ON RESPONSE OF GEOELECTRIC FIELD TO GROUNDWATER SEEPAGE. Geophysical and Geochemical Exploration, 2012, 36(2): 220-223.
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