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为了揭示煤炭开采过程中煤层变形运动与瓦斯运移之间存在的复杂耦合作用,以煤层孔隙度和瓦斯压力为桥梁建立了煤层变形运动与瓦斯在煤层中运移的耦合动力学模型.通过理论分析和计算机编程模拟研究了低瓦斯煤层、高瓦斯非突出煤层和高瓦斯突出煤层变形与瓦斯运移的耦合运动,给出了煤层渗透率分布曲面图以及瓦斯流量的时间历程曲线.计算结果表明,所模拟的低瓦斯煤层中瓦斯运移不发生失稳,且瓦斯涌出量的稳定值在0.2 m3/min以下;高瓦斯非突出煤层中瓦斯的运移也不会发生失稳,但是瓦斯涌出量的稳定值大于4.8 m3/min;高瓦斯突出煤层中瓦斯的运移发生失稳.基于显式快速Lagrange算法编程计算的煤层变形与瓦斯运移耦合系统数值响应与实际相符.
In order to reveal the complicated coupling between coal seam deformation and gas migration during the process of coal mining, the coupled dynamic model of coal seam deformation and gas migration in coal seam is established by using the porosity and gas pressure of the coal seam as a bridge.By theory Analysis and computer programming simulation of the coupling of deformation and gas migration of low-gas coal seam, high-gas non-salient coal seam and high-gas outburst coal seam, gives the curve of coal seam permeability distribution and the time history curve of gas flow rate.The results show , The gas migration in the simulated low-gas coal seam does not destabilize, and the stable value of gas emission is below 0.2 m3 / min. The gas migration in the high-gas non-protruding coal seam will not be instable, but the gas The stability of gushing volume is more than 4.8 m3 / min. The gas migration in high gassy outburst coal seam is instable. The numerical response of coal seam deformation and gas migration coupling system programmed and calculated based on explicit fast Lagrange algorithm is in accordance with the actual.