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Common sense of coal mine safety-underground climatic conditions
Release time:
2022-12-08
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Downhole climatic conditions
Downhole climatic conditions
Downhole climate condition refers to the comprehensive state of the temperature, humidity and wind speed of the underground air.
1. Downhole air temperature
"Coal Mine Safety Regulations" stipulates that the temperature of the mining face shall not exceed 26 ℃;The temperature shall not exceed 30 ℃; The air temperature below the air inlet shall not be less than 2 ℃. Therefore, except for the electromechanical chamber,The air temperature of the downhole airflow is allowed to change within the range of 2~26 ℃.
2. Underground air humidity
Downhole air humidity generally refers to the relative humidity of the air.
When the air humidity is less than 30%, the water evaporates too fast, which will cause the human mucosa to dry and crack; the relative humidity is largeAt 80%, it is difficult for water to evaporate, making people bored. The more comfortable humidity is 50% ~ 60%.
3. Wind speed
Wind speed is too high, will cause the human body adverse physiological reaction, make people energy lax, the accident increased;Blow up the mine dust that has fallen on the roadway wall again, worsen the sanitary conditions of the mine, and the coal dust flying will cause18 The potential danger of coal dust explosion. If the wind speed is too low, the gas cannot be ruled out, causing gas accumulation.
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