Analysis of influence of laying heat insulation layer on cooling effect of roadway
In order to solve the heat damage issue brought by deep mining in coal mines,based on ANSYS simulation software,the roadway heat insulation model was constructed.The influence of basic parameters of different heat insulation layers and laying methods on the roadway wall structure was analyzed,and the cooling effect of the heat insulation roadway was further investigated.The results of the study show that the laying of the heat insulation layer could reduce the radius of the peripheral rock heat-regulating circle and slow down the heat dissipation of the peripheral rock,and the three ways of laying the heat insulation layer have little effect on the temperature field of the peripheral rock.Compared with the temperature of the non-insulated support layer,the average temperature of the support layer is reduced significantly by laying of the heat insulation layer in the rock-adhering type,whereas the opposite is true for wall-adhering type and the sandwich type.The increase in the thickness of the heat insulation layer and the decrease in the heat conduction coefficient of heat-insulating material could increase the heat-insulating effect,and 7cm is the optimal thickness of heat insulation layer.Excessive inlet wind speed or air temperature will affect the cooling effect of heat-insulated roadway.Heat-insulated roadway is suitable for high temperature roadway with low wind speed,low inlet air temperature and long ventilation distance.
insulation layerroadway insulationcooling effecttemperature field of surrounding rocktemperature gradientairflow temperature
万方数据
维普
