Laboratory Experiments and Numerical Simulation on Coal and Gas Outbursts
Laboratory Experiments and Numerical Simulation on Coal and Gas Outbursts
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发表时间：
2008
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通讯作者：
Yan Ai-hua
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作者：
Yan Ai-hua
本文对煤与瓦斯突出进行了室内实验研究，采用高吸附量气体CO2和低吸附量气体N2，利用自适应神经网络模拟不同强度的瓦斯突出，设计了实验装置，实验室实验表明，高瓦斯压力时煤与瓦斯突出强度高，反之亦然，煤与瓦斯突出强度随瓦斯压力的增大而增大。在此基础上，对煤与瓦斯突出的动力学灾变过程进行了数值模拟，模拟再现了在瓦斯压力的相互作用下，煤与瓦斯突出微裂纹的萌生、扩展、相互作用和贯通的全过程，本文的研究结果对深入认识煤与瓦斯突出机理具有重要意义。
In this paper,laboratory experiments on coal and gas outbursts were carried out,and the outburst-prone coal,high adsorption capacity gas CO2 and low adsorption capacity gas N2 were adopted to simulate the outbursts with various intensities of outbursts by using self-devised experimental equipment.Laboratory experiments show that the intensity of coal and gas outbursts is high for high gas pressure and vice visa.The intensity of coal and gas outbursts is also high for gas with high adsorption and desorption capacity gas when the gas pressure is nearly the same.Furthermore,the dynamic catastrophic process of coal and gas outbursts was also modeled to investigate the mechanism of outburst.Numerical simulations reproduced the entire process of coal and gas outbursts caused by initiation,propagation,interaction,and coalescence of the microcracks under the mutual effect of gas pressure,induced stress and physico-mechanical properties of coal.The conclusions in this paper are of great help to gain insight into the mechanisms of the coal and gas outbursts.