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《Coal Science and Technology》 2014-07
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Determination on Critical Value of Gas Content Based on Gas Adsorption and Desorption Experiment

CHEN Liang;LIU Ming-ju;WU Bing;WANG Yin-kai;WANG Chao;School of Resources and Safety Engineering,China University of Mining and Technology(Beijing);School of Safety Science and Engineering,Henan Polytechnic University;Lugou Mine,Zhengzhou Coal and Electric Power Corporation Limited;  
In order to determine the critical value of gas content and predict the coal and gas outburst region,a method to determine the critical value of gas content was provided based on the gas adsorption and desorption experiment. With the gas adsorption and desorption experiment,a relation formula between the gas pressure,gas content and the drilling cuttings desorption index Δh2was established,the critical value of the drilling cuttings desorption index Δh2obtained in No. D6 seam of Pingmei No. 1 Mine was 160 Pa and the relevant minimum gas content calculated was 5. 04 m3/t when Δh2was in the critical value,which had good agreement with the gas content critical value of 5 m3/t preliminarily determined with Langmuir formula method. The engineering application showed that the method to determine the critical value of gas content based on the gas adsorption and desorption experiment was rational.
【Fund】: “十一五”国家科技支撑计划资助项目(2006BAK03B01)
【CateGory Index】: TD712
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