First, safety technical measures during the wind stop: 1. At 8:00 on July 19, when the squad members are inspecting underground, they should pay close attention to the change of air volume in the roadway. Once there is no wind or the wind speed is significantly reduced, all the working faces and all the way along the way will be evacuated to the wind with the wind flow. In the alley. 2. After the ventilator stops the wind, all areas and working places in the underground must immediately stop operation, cut off the power supply, and set the fence. All personnel are first evacuated to a horizontal east, south and west wing into the wind alley (central pump house, central distribution) The electric room and the second pump house cannot be powered off). 3. Once the gas crew finds the phenomenon of shutting down the wind, it immediately reports to the dispatching room and the district dispatching. The dispatching room informs each unit to evacuate all the personnel in the underground to the main wind inlet. 4. During the wind stop, the main ventilation machine shall notify the ventilation area and the air transport team by the dispatching room, and open the damper of the main well ground floor to make the mine naturally ventilate. 5, a large area gas emission and coal layer such as high temperature point: 2092,1295,3094,1291 monitor. Second, restoring ventilation, all technical measures, 1. After the main ventilator resumes power supply operation, the dispatching room shall inform the power supply team to send power to the power distribution room. And inform the underground units to prepare for work. 2. After the main fan returns to normal ventilation, the ventilation area monitoring personnel, the power supply team personnel, and the repairing plant personnel supply power to each working surface. The gas inspector checks the gas concentration of each mining and excavation face, and assists the on-site class (group) to carry out the restoration of ventilation and the treatment of gas, in the order of returning the working face after restoring the local ventilation face. 3. In series with the working face, firstly restore the working side of the inlet side, and then resume the working side of the returning side. 4. The working face of the excavation must first check the gas concentration in the range of 20m near the local fan and its switch, and not more than 0.5%, in order to restore ventilation and handle gas work. 5. If the gas concentration of the working face does not exceed 1%, the excavation working face can be directly opened to restore the air supply; the working face can also directly restore ventilation. 6. If the concentration of the gas is more than 1%, the “small treatment†method should be used to treat the gas, that is, the local fan should be opened to control the air volume, and the gas concentration at the mixed airflow and full wind pressure should not exceed 1.0%. The mouth is processed step by step until the head. 7. The gas concentration of the working face is more than 1%. The positive eye (middle eye) damper can be used to control the air volume of the face, and the working face gas is gradually excluded; the upper corner is treated with the wind account. 8. If the gas concentration exceeds 1% in other locations, according to the volume, use the wind account or install the fan, and use the "small processing" method. 9. If the concentration of the gas is more than 3%, the gas crew must evacuate the personnel, lay the fence, reveal the warning signs, report the area, and dispatch the mine, and the rescue team will handle it. 10. When the working face and the working face with gas concentration exceeding 3% are restored, after the ventilation is restored, all the switch covers must be opened for the electromechanical maintenance to eliminate the gas that may accumulate inside, and the power supply can be restored only after confirming that there is no problem.
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Emergency measures for mine power outage and wind stop accident during main fan single operation
According to the requirements, the mine ventilator will perform a rotation operation every 1-3 months, and the maximum length is no more than half a year. In the meantime, in order to prevent mine run-off accidents due to failure of No. 1 main fan, the following safety technical measures are formulated: