Volume 27 Issue 6
Dec.  1999
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Yu Shijian, Cheng Jiulong, Wang Yuhe, Yan Shijie, Zhang Tongzhou, Li Yongchun. ANALYSIS ON THE ABSORPTING CHARACTERISTICS OF ELECTROMAGNETIC WAVE IN COAL SEAM WITH SOFT COAL, ROOF AND FLOOR[J]. COAL GEOLOGY & EXPLORATION, 1999, 27(6): 60-62.
Citation: Yu Shijian, Cheng Jiulong, Wang Yuhe, Yan Shijie, Zhang Tongzhou, Li Yongchun. ANALYSIS ON THE ABSORPTING CHARACTERISTICS OF ELECTROMAGNETIC WAVE IN COAL SEAM WITH SOFT COAL, ROOF AND FLOOR[J]. COAL GEOLOGY & EXPLORATION, 1999, 27(6): 60-62.
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ANALYSIS ON THE ABSORPTING CHARACTERISTICS OF ELECTROMAGNETIC WAVE IN COAL SEAM WITH SOFT COAL, ROOF AND FLOOR

  • 1. Shandong Mining Institute;

  • 2. Liangjia Coal Mine of Longkou Mining Bureau

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  • Received Date: April 26, 1999
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  • Based on the tunnel transmission tests on both working faces in Liangjia mine,the absorpting coefficient β of electromagnetic wave in coal seam with soft coal,roof and floor is found;using the absorpting chromatograph charts of working faces obtained by the CT technique processing,the absorption abnormal characteristics of fractures and structures in coal seam with soft coal,roof and floor are analyzed,and the better geological effectiveness is obtained.
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