避难硐室温度计算模型及影响因素

Mathematical model and influencing factor of temperature in refuge chamber

针对避难硐室等井下密闭空间内温升问题,以热力学方程为基础,建立受围岩传热、内部产热影响下的避难硐室温度计算模型,采用Matlab迭代计算得到硐室内温度变化曲线,实验验证其合理性并对计算模型进行修正;利用修正的计算模型对巷道壁面温度、岩石导热系数、原岩温度、调温圈半径等影响因子进行正交实验分析,并对壁面温度和导热系数这2个因素的影响效果进行进一步分析。研究结果表明:各因素影响程度由大到小顺序为壁面温度、岩石导热系数、原岩温度、调温圈半径。

A temperature calculation model of refuge chamber under the influence of rock heat transfer and internal heat was built, based on the thermodynamic equations, aimed at the increase of the temperature in the confined underground space, such as the refuge chamber. The temperature curve inside refuge chamber was generated by calculating the model with Matlab, and the model was revised according to the comparison of calculation result and experiment. On the basis of the corrected model, an orthogonal experiment was conducted to analyze the factors that influence the temperature in refuge chamber, including the temperature of the roadway surface, the rock thermal conductivity, the temperature of the original rock, and the radius of the controlled temperature circle. Further research on roadway surface temperature and thermal conductivity was conducted. The results show that the most important factor is temperature of roadway surface, and others are rock thermal conductivity, temperature of the original rock, and the radius of the controlled temperature circle.