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《Chinese Journal of Geophysics》 2005-01
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Electromagnetic radiation characteristics of coal and rocks during excavation in coal mine and their application

WANG En-Yuan, HE Xue-Qiu, DOU Ling-Ming, ZHOU Shi-Ning, NIE Bai-Sheng, LIU Zhen-Tang College of Energy & Safety Engineering, China University of Mining and Technology, Xuzhou 221008,China  
Electromagnetic radiation (EMR) signals produced by coal and rocks in working faces during excavation in coal mine were measured with the KBD5 electromagnetic radiation monitoring equipment. We analyze the relationships between electromagnetic radiation signals and excavation, dynamic disaster fatalness of coal and rocks. Our research shows that the electromagnetic radiation is produced in the course of excavation, which is the result of the stress redistribution or deformation and fracture of coal and rocks tending to a new balance when affected by excavation. There is obvious electromagnetic anomaly precursor when there is danger of coal and gas outburst or rock burst, and electromagnetic radiation intensity drops notably after taking measures. The electromagnetic radiation technology can be used for forecasting dynamic disasters such as coal and gas outburst and rock burst in coal mine.
【Fund】: 国家自然科学基金项目 (5 0 2 0 40 10 );; 国家自然科学基金重点项目 (5 0 13 40 40 );; 江苏省自然科学基金项目 (BK2 0 0 10 75 )资助
【CateGory Index】: TD82
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