[an error occurred while processing this directive] ������� 2017, 36(3) 995-1000 DOI:   10.3969/j.issn.1004-5589.2017.03.034  ISSN: 1004-5589 CN: 22-1111/P

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Experimental study on surface electric field distribution model of borehole-to-surface electrical method
LÜ Shou-hang1, DU Li-zhi1, YAO Ren1, WANG Jie1, CHANG Gao-qi2
1. College of Construction Engineering, Jilin University, Changchun 130026, China;
2. CCCC First Harboar Consultants Co Ltd, Tianjin 300222, China
Abstract: In order to study the electric field distribution of borehole-to-surface method in determining the boundary of the anomalous body, the authors supplied electricity directly through low resistance object (copper plate) which was placed at the fixed position of the water sink in the lab, and monitored the surface electric potential distribution characteristic of the electric field formed by the charged low resistance object. The characteristics of potential distribution in different directions were studied, the potential gradient curve were established by linear fitting. The variation of potential gradient in different directions of anomalous body were also analyzed,and the boundary of the low resistance body was determined. The simulation results show that the potential gradient curve has obvious inflection point on the boundary of the anomalous body. By comparing with the potential distribution, the change of the potential gradient curve at the boundary of the anomalous body can be used as a marker to identify the boundary of the anomalous body.
Keywords: low resistance   anomalous body   electric potential   linear fitting   borehole-to-surface electrical method  
�ո����� 2016-11-05 �޻����� 2017-04-11 ����淢������  
DOI: 10.3969/j.issn.1004-5589.2017.03.034
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