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《Coal Science and Technology》 2004-01
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Electric magnetic emission technology to measure pressure release blasting results

LU Cai-ping, DOU Lin-ming (School of Energy Science and Engineering, China University of Mining and Technology, Xuzhou221008, China)  
When a great elastic energy accumulated in coal and rock mass, the pressure release blasting technology can be applied to steadily release the elastic energy in order to eliminate an occurrence of pressure bump caused by different factors. The technology can reduce the sensitive index to occur pressure bump to below the critical value to avoid an occurrence of the pressure bump. But how to measur the sensitive index value of pressure bump after the pressure release blasting is a key technical issue. The theoretical analysis and practices showed that the electric magnetic emission value (strength) could reflect the stress status and accumulated elastic energy of the coal and rock mass and could be a sensitive index to reflect the occurrence rate of the pressure bump. Therefore, the electric magnetic emission is a rational and efficient technical meanings to measure the pressure release blasting results.
【Fund】: 国家自然科学基金资助项目(50074030)
【CateGory Index】: TD235
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