Mechanism research on coal and gas outburst during vibration blasting |
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Authors: | Nie Baisheng Li Xiangchun |
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Affiliation: | School of Resource and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China State Key Laboratory of Coal Resources and Safe Mining, Beijing 100083, China |
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Abstract: | The coal and gas outburst results from plenty of factors, while vibration is the most important factor among them. Therefore, the influences of vibration acting on gas desorption and coal structure had been conducted. And the mechanism of coal and gas outburst induced by vibration was illustrated through examples. The results showed that the gas desorption accelerates under the action of vibration, and then the gas gradient increases. Meanwhile, vibration would increase and expand fractures in the internal coal body, which aggravates the risk of coal and gas outburst greatly. In conclusion, vibration is a more important factor attributable to coal and gas outburst compared with other coal mining method, mining technology and construction method. |
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Keywords: | Coal and gas outburst Vibration Adsorption Fracture |
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