Study on temperature field distribution law of surrounding rock in active thermal insulated roadway of high temperature mine
SONG Dongping
ZHOU Xihua
BAI Gang
LI Ang
Abstract：In order to study the thermal insulation layer of the mine roadway affected to the temperature field of the surrounding rock,according to the energy conservation law and the heat dissipation characteristics of the surrounding rock,an one dimension unsteady heat conduction control equation of the composite medium was established and a computer program was prepared to simulate the temperature field of the surrounding rock in the mine active thermal insulated roadway.The thermal insulation layer affected to the temperature field distribution law of the surrounding rock was calculated and obtained.The study results showed that the thermal insulated layer could slow down the heat dissipation of the surrounding rock to the air flow with the internal temperature gradient changed in the surrounding rock.When the thermal insulated layer was applied,the temperature of the wall surface would be obviously reduced and the temperature distribution of the surrounding rock would have the features of the low temperature of the wall surface and high internal temperature.The radius of the temperature regulated ring in the surrounding rock and the thermal dissipation volume wholly would be in a right power index relationship to the ventilation time.With the thickness of the thermal insulated layer increased,the wall surface temperature of the mine roadway and the thermal dissipation of the surrounding rock would be individually reduced in an index and the power index relationship.The heat dissipation of the surrounding rock reduced with the established thermal insulated layer could be in a negative power index relationship to the thermal conductivity of the thermal insulated layer.An understanding of the thermal insulation mechanism to mine roadway was studied and deepened and would have a certain guidance role to the site application.
Keywords：high temperature mineactive thermal insulationtemperature field of surrounding rockventilation timethickness of thermal insulated layerthermal conductivity index
Publication Date：2017-01-01