河北兴济地电阻率干扰定量分析

Abstract

Abstract: In order to study environment interferences (excavation puddle and steel structure workshop) on the observation of georesistivity, we built a three-dimensinal finite element physical model of the interference based on electric sounding data and lithologic data at Xingji seismic station to do quantitative analysis. Both of excavation puddle and steel structure workshop are built at intermediate electrode N₄ and the power supply electrode B₄ in the measured area which is at minus sensitivity coefficient. The excavation puddle is a low resistivity body in summer when the water level is high, on the contrary, the excavation puddle is a high resistivity body in winter when the water level is low. Analyzed results of the model suggest that reverse of annual variation of georesistivity at N60°W direction was due to the seasonal changes of water storage in excavation puddle. Steel structure of brick factory is a low resistivity in the test area. The trend of rising change of the georesistivity in N60°W direction since April 2016 was caused by reconstruction of steel structure workshop.

Key words: Georesistivity, Environmental interferences, Numerical simulation, Xingji seismic station

CLC Number:

P315.7

ZHANG Guo-ling,JIA Li-feng,QIAO Zi-yun,GUO Xue-zeng,NIU Shu-yu. Quantitative Analysis of Georesistivity Disturbances at Xingji Station, Hebei Province[J]. EARTHQUAKE, 2017, 37(4): 102-111.

References

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Quantitative Analysis of Georesistivity Disturbances at Xingji Station, Hebei Province

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