针对含瓦斯煤渗透率在热力耦合作用下的演变规律，利用多物理场耦合控制方程建立相应的数值模型，对实验工况进行数值求解。将实验及数值模拟结果进行对比分析得出如下结论：①综合不同瓦斯压力情况下的轴压、围压对渗透率影响，模拟结果中渗透率普遍高于实验数据；②模拟计算得到的围压与渗透率之间呈指数关系，与实验结果的吻合度较高；③利用COMSOL Multiphysics数值模拟研究热力耦合情况下含瓦斯煤渗透率的影响规律，轴压处于高应力场下的模拟吻合度高于低应力场，采用单孔瓦斯渗流模型对高应力场的计算吻合度更好。%For the permeabilityevolvement rule about coal samples containing gas , numerical solution was car-ried out about experimental operating conditions , that corresponding numerical model was established using more physical field coupling control equation .The following conclusions were got based on the comparison and analysis of experiment and numerical simulation results .①Coal sample permeability presents downtrend with the rise of tem-perature, the change curve was “S” type, and the function expression of the curve was given .②Coal sample per-meability could be divided into 5 stages with temperature variation curve , respectively for the slow decline phase , the acceleration of the decline stage , the deceleration phase , the two accelerated decline stage , the slow stage .③Affected by temperature changes , volumetric strain of coal sample under load has an increasing trend , change process curve could be divided into rise-slow-rise again-then slow down four stages , it also correspond to permeabil-ity change with temperature process .
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