Study On Thermal Environment Of Thermal Hazard And Driving Face In Deep Mine

With the mineral resources of human increasing demand, the mine mining depth deepening and gradually into the deep mine. Deep mine is bound to face high temperature, high temperature will cause heat harm, heat harm is not only detrimental to the physical and mental health of underground workers, and reduce the production efficiency, also easy to cause downhole accidents and eventually restricts the development of the mine, so the influence factors of temperature and humidity in deep mines, the heat exchange of surrounding rock, thermal damage location-heading face one of the most severe thermal environment analysis.Using the method of combining the theory and numerical simulation of deep mine heat harm and heading face, this paper analyzes the thermal environment, get the following results:1. The analysis of the influence factors of downhole temperature and humidity and underground heat and humidity sources distribution.2. Geothermal research, determines Liuju mining area is often geothermal gradient classes, The secondary heat mining area and tertiary mine heat harm.3. Based on the heat and humidity exchange theory of surrounding rock, deduce the wind temperature theoretical predictions of each feature point in heading face.4. Reference PMV, PPD human body thermal comfort evaluation index to evaluate tunneling faces thermal environment of comfort, and use-1≤PMV≤+1, PPD≤27% as evaluation standard.5. Analysis of the tunneling faces the wind flow field, temperature field and humidity field and get the distribution regularity of universal.6. Through the analysis of the numerical simulation results show that increasing supply air volume is not conducive to higher temperature of surrounding rock caused by tunneling faces the thermal environment of the high temperature control, increase the air volume just increase the comfort of workers engaged in gravity body, not fundamentally achieve the purpose of controlling heat harm, instead of causing wind temperature rise in the tunneling faces.7. The excavation roadway of original rock of high temperature ventilates with low wind speed (roadway in average wind speed 0.25m/s advisable) combined with the artificial refrigeration can achieve effective heat harm control.