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对国内某煤炭地下气化现场气化煤层的顶底板岩石不同温度下的热力学参数资料进行了收集整理,建立了岩石及煤比热容和导热系数随温度变化的拟合曲线方程,并采用COMSOL模拟了研究区地下气化的温度场分布。根据温度场模拟结果运用FLAC~(3D)软件对研究区的覆岩裂隙场进行了数值模拟,证明了数值计算模型及其结果的合理性。
The data of thermodynamic parameters of top and bottom rock of underground gasification coal seam at different temperatures in China were collected and compiled. The fitted curve equations of specific heat capacity and thermal conductivity of rock and coal with temperature were established and simulated by COMSOL Underground gasification temperature distribution in the study area. FLAC 3D software is used to simulate the overburden crack field in the study area according to the temperature field simulation results. The numerical calculation model and its rationality are proved.