Technical measures for the elimination of gas in the shutdown area

October 12 14:03:02, 2024

1. When the mining work is close to the closed stoppage area, the gas accumulated in the stoppage area must be excluded in advance, and the mining operation can be continued when the gas concentration is below 1.0%.

2. When discharging gas, the principle of low-concentration emission should be adhered to, and the gas concentration after mixing the discharged airflow with the full-wind pressure can not exceed 1.5% by controlling the air volume.

3. Discharge gas, the route through which the return air flows must cut off the power supply, evacuate the personnel, set the fence or alert, and stop the operation. The power supply can be restored when the gas concentration in the roadway airflow does not exceed 1.0% and the carbon dioxide concentration does not exceed 1.5%.

4. When the concentration of gas in the closed roadway does not exceed 3%, the person in charge of the level shall be responsible for the discharge. When more than 3%, the person in charge of the level shall submit written measures, approved by the person in charge of the mine, and discharged by the mine leader. The mine rescue team assisted in the discharge.

5. The work of discharging gas should be carried out from the outside to the inside. It is strictly forbidden to discharge gas at the same time in two gas-limited locations in one production system.

6. After the local ventilator is turned on, the two staff members who wear the self-rescuer walk in tandem, gradually withdraw the enclosed area, and gradually add the air duct from the outside to the inside.

7. In gas emission, when the gas concentration is below 1.0%, it can enter the shutdown area.

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