To study active heat insulation roadway in high temperature mines, the typical high temperature roadway of − 965 m in Zhujidong Coal Mine of Anhui, China, is selected as prototype. The ANSYS numerical simulation method is used for sensitivity analysis of heat insulation layer with different thermal conductivity and thickness, as well as surrounding rock with different thermal conductivity and temperature on a heat-adjusting zone radius, surrounding rock temperature field and wall temperature. The results show that the heat-adjusting zone radius will entirely be in the right power index relationship to the ventilation time. Decrease in thermal conductivity and increase in thickness of insulation layer can effectively reduce the disturbance of airflow on the surrounding rock temperature, hence, beneficial for decreasing wall temperature. This favourable trend significantly decreases with ventilation time, increase in thermal conductivity and temperature of surrounding rock, heat-adjusting zone radius, surrounding rock temperature field, and wall temperature. Sensitivity analysis shows that the thermal physical properties of surrounding rock determine the temperature distribution of the roadway, hence, temperature of surrounding rock is considered as the most sensitive factor of all influencing factors. For the spray layer, thermal conductivity is more sensitive, compared to thickness. It is concluded that increase in the spray layer thickness is not as beneficial as using low thermal conductivity insulation material. Therefore, roadway preferential consideration should be given to the rocks with low temperature and thermal conductivity. The application of the insulation layer has positive significance for the thermal environment control in mine roadway, however, increase in the layer thickness without restriction has a limited effect on the thermal insulation.

为了研究高温矿井中的主动绝热巷道，选择了安徽省诸暨东煤矿典型的965 m高温巷道作为样机。ANSYS数值模拟方法用于对导热系数和厚度不同的隔热层以及导热系数和温度不同的围岩的热调节区半径，围岩温度场和壁温进行敏感性分析。结果表明，热调节区半径与通风时间完全处于正确的功率指数关系。导热系数的降低和保温层厚度的增加可以有效地减少气流对围岩温度的干扰，因此，有利于降低壁温。随着通风时间的增加，围岩的导热系数和温度，热调节区半径，围岩温度场和壁温的升高，这种有利趋势显着降低。敏感性分析表明，围岩的热物理性质决定了巷道的温度分布，因此，围岩温度被认为是所有影响因素中最敏感的因素。对于喷涂层，与厚度相比，导热系数更敏感。可以得出结论，增加喷涂层的厚度不如使用低导热率的隔热材料那样有利。因此，应优先考虑具有低导热性的岩石。