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Common sense of coal mine safety-maximum allowable concentration of harmful gases in mines
Release time:
2022-12-08
Author:
Source:
The main harmful gases in the underground air are carbon monoxide, carbon dioxide, hydrogen sulfide, sulfur dioxide, Nitrogen dioxide, ammonia, methane and hydrogen, etc.
Maximum allowable concentration of harmful gas in mine
The main harmful gases in the underground air are carbon monoxide, carbon dioxide, hydrogen sulfide, sulfur dioxide,
Nitrogen dioxide, ammonia, methane and hydrogen, etc.
| Name | Maximum allowable concentration/% |
| Carbon Monoxide | 0.0024 |
| Nitric oxide (converted to nitrogen dioxide) | 0.00025 |
| Sulphur dioxide | 0.0005 |
| Hydrogen sulfide | 0.00066 |
| Ammonia | 0.004 |
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