Characteristics of electromagnetic vector field generated from rock fracturing  

作　　者：Menghan Wei Dazhao Song Xueqiu He Quan Lou Liming Qiu Zhenlei Li 

机构地区：[1]Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,University of Science and Technology Beijing,Beijing,China [2]School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing,China [3]Zhong-An Academy of Safety Engineering,Beijing,China [4]School of Municipal and Environmental Engineering,Henan University of Urban Construction,Pingdingshan,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2023年第2期457-466,共10页岩石力学与岩土工程学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.51904019);Key Scientific Research Projects Plan of Henan Higher Education Institution(Grant No.21A620001);Fundamental Research Funds for the Central Universities(Grant No.FRF-IDRY-20-006).

摘　　要：Rock fracturing is often accompanied by electromagnetic phenomenon.As a vector field,in addition to the intensity that is widely concerned,the generated electromagnetic field also has obvious direction-ality.To this end,a set of electromagnetic antennas capable of simultaneous three-axis measurement is used to monitor the electromagnetic vector field generated from rock fracturing based on Brazilian tests.The signal amplitude on each axis can represent the magnitude of actual magnetic flux density component on the three axes.The intensity and directional characteristics of electromagnetic signals received at different positions are studied using vector synthesis.The directionality of electromagnetic radiation measured using a three-axis electromagnetic antenna shows that the direction of the magnetic flux intensity generated by rock fracturing tends to be parallel to the crack surface,and the measured signal intensity is greater in a direction closer to the crack surface.

关 键 词：Electromagnetic radiation DIRECTIONALITY Vector field Rock fracturing 

分 类 号：TU45[建筑科学—岩土工程]