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Characteristics and applications of gas desorption with excavation disturbances in coal mining

International Journal of coal Science & Technology 2015年第1期2卷 30-37页

作者： Jiachen Wang College of Resources and Safety Engineering China University of Mining & Technology (Beijing) Beijing 100083 China State Key Laboratory of coal Resources and Safe Mining China University of Mining & Technology (Beijing) Beijing 100083 China

According to the deficiency of experiment system for gas adsorption and desorption in coal mass, a large scale experiment system is developed independently by researchers. This experiment system is composed of primary and auxiliary boxes, power transmission system, mining system, loading system, gas charging system, data monitoring and intelligent acquisition system. The maximum experiment coal consumption is 1200 kg, the mining system is developed to conduct experiment for gas desorption under excavating disturbance, and the plane-charging cribriform ventilation device is developed to realize uniform ventilation for experiment coal sample, which is accord with the actual gas source situation of coal bed. The desorption characteristics of gas in coal are experimentally studied under the conditions of nature and mining using the experiment system. The results show that, compare with nature condition, the permeability of coal and the velocity of gas desorption could significantly increase under the influence of coal pressure relief and destruction caused by mining, and the degree of gas desorption could somewhat increase too. Finally, pressure relief gas extraction of current seam and adjacent seams after mining in a certain coal mine of Yangquan mining area are introduced, and the gas desorption experiment results is verified by analyzing the effect of gas extraction.

关键词： gas adsorption and desorption experimental system Mining gas desorption ~ simultaneous extraction of coal and gas

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