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为研究温度和含水量对煤、岩体导热系数的影响,采用激光闪射法测得8种煤、岩样品的导热特性参数;利用单因子方差分析方法对不同温度条件下的煤岩体导热系数测定结果进行比较分析,结果表明:煤岩体的导热系数随温度升高线性降低,随含水量增大而增大;岩石的导热系数大于煤体的导热系数,岩石的导热系数为1~5W/(m·K),煤的导热系数为0.1~0.5 W/(m·K);拟合得到不同煤体导热系数和温度的关系式,其拟合函数相关度在0.93左右,最大相对误差为2.18%。因此,可利用拟合函数和测试结果预测测试矿井的煤岩体导热系数。
In order to study the influence of temperature and water content on the thermal conductivity of coal and rock mass, the thermal parameters of 8 coal and rock samples were measured by laser flash method. The thermal conductivity of coal and rock mass under different temperature conditions The results show that the thermal conductivity of coal and rock body decreases linearly with temperature and increases with the increase of water content. The thermal conductivity of rock is larger than the thermal conductivity of coal body. The thermal conductivity of rock is 1 ~ 5W / (m · K), and the thermal conductivity of coal is 0.1-0.5 W / (m · K). The relationship between the thermal conductivity and the temperature of different coal bodies is obtained. The correlation coefficient of fitting function is about 0.93. The maximum relative error 2.18%. Therefore, the fitting function and test results can be used to predict the thermal conductivity of coal and rock mass in test mines.