What does one pass and three defenses mean?

One ventilation and three prevention standards are as follows:

1, ventilation: it means strengthening mine ventilation to ensure the safety of underground working environment.

2, gas prevention and control: refers to take measures to prevent gas accumulation and explosion, gas is an important safety hazard in coal mining.

3. Coal dust prevention: it refers to preventing coal dust from flying and reducing occupational diseases such as pneumoconiosis caused by coal dust.

4. Fire prevention: refers to the prevention and control of mine fires to ensure mine safety. This concept emphasizes that in the process of mine production, it is necessary to ensure the effective operation of ventilation system, prevent accidents caused by gas and coal dust accumulation, and take measures to prevent fires.

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