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《JOURNAL OF CHANGCHUN UNIVERSITY OF SCIENCE AND TECHNOLOGY》 2000-01
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RESPONSES OF GEOPHYSICAL FIELD CAUSED BY COAL AND GAS OUTBURSTS

LU Shao_lin 1, HE Ji_shan 2, LI Zhou_bo 1 (1.Changchun University of Science and Technology, Changchun 130026, China; 2.Central South University of Technology, Changsha 410083, China)  
The electromagnetic and elastic wave velocity responses of the geophysical field caused by coal and gas outbursts are studied in this paper. The responses are caused by the media constituting the geophysical field. Coal seams liable to outburst consist of key layers and accompaning layers according to the key layer and stress-dike mechanism of outbursts proposed by the authors recently. The spatial distribution and their interaction mechanism of the key layer and accompaning layer are completely reflected in different responses of geophysical field. The key layer (i.e. disturbed and gas-logged coal mass or outburst coal) can be identified by geophysical methods because the key layer is regarded as the abnormal body in geophysical field. The studies on the response of geophysical field provide a scientific thought to theory and prediction methods of outbursts from the geophysics.
【Fund】: 国家自然科学基金!资助项目(49674230)
【CateGory Index】: P631.2
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