Status quo of high-temperature heat hazard control and prevention technology in deep mines
With the continuous extension of mining development systems,the mining depth of some mines domes-tically and abroad has reached below 1 000 m,and in a couple of years,some mines will exceed depths of 1 500 m or even 2 000 m.In the process of deep mining,due to the effects of geothermal gradient,heat release from large amounts of mechanical equipment and surrounding rock,and long-distance single-heading excavation operations,the operation environment temperature can reach above 40 ℃.This severely restricts mining efficiency and jeopardizes the physical and mental health of workers.Therefore,high-temperature heat hazards are one of the main technical challenges that need to be addressed in deep mines.Through data collection and technical survey,it is summarized that deep mines at home and abroad face ventilation problems mainly in terms of poor air environment,insufficient total air volume,dis-ordered ventilation networks,poor management of ventilation equipment and structures,and high costs.The main hazards caused by high-temperature environments to humans,equipment,surrounding rock,and support are identified.Based on this,conventional ventilation cooling and refrigeration cooling methods and proposals for key technical measures are summarized.The research findings provide technical references for controlling high-temperature heat hazards in deep mines.
deep mininghigh-temperature heat hazarddeep mine ventilationrefrigeration and coolingheat hazard control
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