Simulation and Analysis about the Heat Dissipation Law of Surrounding Rock in Driving Roadway

By analyzing the heat dissipation mechanism of roadway surrounding rock, the physical model and mathematical model of heat transfer of roadway surrounding rock are constructed respectively. Based on the finite element volume method, the software for heat dissipation of roadway surrounding rock is developed. Through computer simulation, the influencing factors such as the distance between temperature field of roadway surrounding rock and wall surface of surrounding rock, ventilation time, wind speed and lithology are analyzed. The relationship and regularity of thermal hazards in different lithologic roadways are divided. The results show that the more far away from the wall of roadway, the more stable the temperature changes; with the prolongation of ventilation time, the shape and size of cooling ring change significantly, and the shape of cooling ring gradually changes from semi-circular arch to circular; granite, limestone and sandstone have little influence on the heat dissipation of surrounding rock; the distance between rock roadway and coal roadway is about 30 m ahead of the roadway. The roadway spacing is about 50 m from the front, which is the key area of heat hazard prevention and control.