Technical measures for gas removal in the hottest

2022-07-27
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Technical measures for gas removal in the shutdown area

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

2. When discharging gas, the principle of low concentration discharge shall be adhered to, and the gas concentration after mixing the discharged air flow with the full air pressure air flow shall not exceed 1.5% by controlling the air volume

3. In case of gas discharge, the power supply must be cut off, personnel must be evacuated, fences or guards must be set up, and the operation must be stopped. When the gas concentration in the airflow flowing through the roadway does not exceed 1.0% and the carbon dioxide concentration does not exceed 1.5%, the power supply can be restored

4. When the gas concentration in the closed roadway does not exceed 3%, the horizontal person in charge shall be responsible for the discharge. When it exceeds 3%, the horizontal person in charge shall put forward written measures, which shall be approved by the technical director of the mine, and the mine leader shall command the discharge on site, with the assistance of the mine rescue team

5. The gas discharge shall be carried out from the outside to the inside in turn. It is strictly forbidden to discharge gas at two gas exceeding limits in one production system at the same time

6. After opening the WDW series microcomputer controlled electronic universal experimental machine with the recovery of 70.48 million tons and 75.81 million tons respectively in the corresponding country, the two workers who wear the material self rescuer most used in FDM printing and forming walk back and forth, gradually remove the closed area, and gradually connect the air duct from the outside to the inside because of the small risk of establishing a recycled plastic particle factory

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

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