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侵入闸河复向斜北部的花岗斑岩岩株及侵入煤层中不同岩性的岩床,使闸河矿区的煤发生剧烈的岩浆热变质作用。为了探讨岩株和岩床侵入后造成煤层内的温度场变化,在一定假设条件下,建立热力学模型,使用电子计算机进行模拟计算。结果表明:直径约11公里的岩株在侵入后80万年,距接触界面约3.5公里外,温度降到100℃以下,其影响范围大致等于该岩株半径。岩床侵入煤层后,煤层内温度场的变化除与岩床本身岩性和厚度有关外,还与煤层顶(底)板岩性,煤层结构有关。根据模拟计算,两种岩体所能造成的热变质带的范围是有限的。
The granite porphyry intrusion into the northern part of the Zhahe synclinorium and the rock bed intruded into the coal seam with different lithologies made the coal in the Zhahe mining area undergo intense magmatic thermal metamorphism. In order to discuss the change of temperature field in the coal seam caused by intrusion of rock mass and bedrock, under certain assumptions, the thermodynamic model was established and simulated by computer. The results show that the rock mass with a diameter of about 11 kilometers reaches 800,000 years after intrusion and is about 3.5 kilometers away from the contact interface, and the temperature falls below 100 degrees Celsius. Its influence range is roughly equal to the radius of the rock mass. After intrusion into the coal bed, the change of the temperature field in the coal bed is related to the lithology and thickness of the top (bottom) slate of the coal bed besides the lithology and thickness of the bed itself. According to the simulation calculation, the range of thermal metamorphic belts that the two rock masses can cause is limited.