Analysis Of The Deep Heat Harm And Study On The Thermal Environment Of The Heading Face In Zhouyuanshan Coal Mine

As foreign and domestic mining are successively entering into deep resource exploitation condition, heat harm with high temperature and humidity is an inevitable natural disaster. Work environment affects the safe operation,miner's labor efficiency and healthy directly. Therefore, it is very important to research on mine thermal environment with high temperature and humidity, so as to create a safety, economy and comfortable working environment, control heat harm comprehensively. Integrated the Zhouyuanshan coal mine's heat harm control engineer practice, it analyzed the causes and the harm to deep heat harm mine and adopted the theoretical analysis, site measurement, numerical simulation means to study on the thermal environment of the heading face and achieved the following results.(1) Summarizes the domestic and foreign mine thermal environment theory and the mine air conditioning cooling technology research, analyzes the Zhouyuanshan coal mine's heat and humidity source distribution. It obtained that heat emitting of surrounding rock and compressed air was the main reason to cause the working face's high temperature. Surrounding rock supporting, spray sprinkler, hydrology geology, and climate environment such as factors influenced the air humidity. There exists three forms of heat and humidity exchange included thermal conductivity, convection, radiation between the airflow and surrounding rock.(2) Through the analysis of the thermal balance equation of human body, described high temperature and humidity damage to human body health, detailed analysis the factors influenced the miners thermal comfort. Mine ventilation and miners'thermal comfort evaluated by the air age and PMV-PPD index. Thermal environment evaluation result could be predicted by air age and PMV-PPD index and quantified thermal environment prediction evaluation results.(3) Using mine ventilation multi-parameter measurement device of CZC5, pump suction multi-parameter measurement device of CD4 and mine explosion-proof infrared temperature measurement device of Raynger ST6, it measured the meteorological data and ventilated thermal parameters on surface, a downhole ventilation, and a heading face of 32 return airflow dip in Zhouyuanshan coal mine. There obtained surface meteorological data of daily variation regularity, underground thermal environment change as the ground climate, the heading face's ventilation effect of 32 return airflow dip.(4) According to the mine air flow mathematical model, the 3-d numerical simulation of the thermal environment in the deep heading face under the measured data and changing the affected thermal environment factors boundary conditions in Zhouyuanshan coal mine based on Airpak2.1, which obtained that heading face airflow organization distribution. The optimal supply air parameter was found under the air volume, temperature, and humidity combination.(5) According to Zhouyuanshan coal mine with natural characteristics such as cold source, draw up the mine air conditioning cooling of HEMS scheme so as to extract cold quantity from mine water-inrush. Combined numerical simulation results and actual engineering practice to determine the heading face's ventilation parameters of 32 return airflow dip, such as air volume, air temperature and air relative humidity. Keywords: thermal environment; high temperature and humidity; heat harm control;...