Heat Emission Effect from Surrounding Rocks of High- temperature Working Face in Deep Mines

Thermal disaster in working face in deep mines seriously influences on production safety,and heat emitting from surrounding rocks is the main heat source. In order to study influence of heat emitting from surrounding rocks on temperature of airflow in roadways,a high- temperature working face in a mine of Huainan Mining Group was taken as an engineering background,distribution of temperature field of airflow in the working face and roadways along the working face was studied on the basis of theoretical analysis and numerical simulation,and the results with the in- situ measurement were compared. The results showed that: 1) the temperature of airflow in roadways increases by exponential function with the distance from the working face along the strike direction,and the longer the roadway is,the closer to the temperature of surrounding rocks at the end of the roadway; 2) in the intersection area of working face with intake roadway or air- return roadway,heat is difficult to dissipate and forms the abnormal area of temperature field and velocity field because of the turblance effect of airflow,which is also the critical area for heat disaster control.