Antifreeze system for air inlet wellbore of underground mine in high-cold region

Abstract

The invention discloses an antifreeze system for an air inlet wellbore of an underground mine in a high-cold region. The antifreeze system is composed of a preheating unit (15), an air curtain unit (18), an annular jet air vent (19), a fan device, an air door, sensors and a PLC control system (14) in a combined mode; the preheating unit (15) is arranged on the wellhead earth surface of an air inlet well (2), the air curtain unit (18) is arranged on the wellhead earth surface of an auxiliary well (1); the annular jet air vent (19) is arranged in the wellbore of the auxiliary well (1); and the PLC control system (14) is connected with all the sensors, receives data collected by all the sensors and adjusts and controls operation of the preheating unit (15), the air curtain unit (18), the fanand the air door. According to the antifreeze system, normal ventilation and inverted ventilation state freezing resisting of the air inlet wellbore at the day and night time periods can be achieved according to the characteristic that the air flowing direction of a ventilation system is changed due to the change of the day and night temperature difference of the underground mine in the high-coldregion.

Description

technical field [0001] The invention belongs to the technical field of mine ventilation and environmental protection, and specifically relates to a system for solving the problem of freezing shafts of mine air intake shafts in alpine regions, and is particularly suitable for antifreezing of air intake shaft shafts where ventilation systems enter air through air intake shafts and auxiliary shafts. Background technique [0002] The air intake shafts of underground mines mainly include auxiliary shafts and air intake shafts. In mines in high-altitude and cold regions, about 80% of underground mines have air intake shafts that suffer from freezing disasters. The cold and low-temperature air on the surface enters along the air-inlet shaft, and encounters the cooling effect of the low-temperature rock temperature in the air-intake shaft. The cold air condenses and freezes on the wall of the air-intake shaft, cables, pipes and other equipment in the shaft, which seriously affects th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of freezing well disasters in the auxiliary shafts of underground mines and the air intake shafts of the air intake shafts in the alpine regions in winter, and the existing technical solutions have high energy consumption for preheating and antifreezing, and the surface of the auxiliary shaft and the inside of the shaft The installation space is limited, the process of conveying hot air affects the thermal comfort of personnel, affects occupational health and safety and other technical problems, and the heat potential contained in the anti-air flow can be used to provide an antifreeze system for the air intake shaft of underground mines in alpine regions. This system can realize the normal ventilation of the air inlet shaft and anti-freezing in the anti-wind state according to the change of the temperature difference between day and night in the underground mine in the alpine area, which leads to the change of the airflow direction of the ventilation system.

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