The gas accumulated in the layered roof of the roadway can be eliminated by increasing the wind speed in the roadway (greater than 1 m/s), or by using a wind deflector or an ejector to blow off the wind. In order to deal with the gas accumulated in the single-head roadway where the wind is stopped, special safety discharge measures must be made to control the amount of air sent to the single-head roadway for discharge. When discharging, gas inspectors should check the gas in the mixed air flow of the single head road and the full wind pressure air flow. When the gas concentration reaches 1.5%, the air volume adjustment personnel should be instructed to reduce the air flow to the single head road. When discharging gas, it is strictly forbidden to generate circulating wind in the local ventilator. The return air system of the single-head roadway must be powered off and evacuated, and the mine rescue team will be on duty on site, and the abnormality will be dealt with in time. Several are the diverticulum, roadway and the mining face that is cut off by the discharged gas flow, and must also stop the evacuation of personnel and set up security personnel to prevent non-discharged gas personnel from entering the roadway through which the gas flows. After the gas is discharged, the normal ventilation can be restored only when the gas concentration in the tunnel is restored to ventilated, the gas concentration does not exceed 1.0%, and the carbon dioxide concentration does not exceed 1.5%. At the time of emission of gas accumulated in the roadway, the gas explosion occurred many times at home and abroad, causing heavy losses and casualties. Sdd Type Manual Tongs,Manual Tongs,Oilfield Workover Manual Tongs,Wcc Manual Tongs JIANGSU PETROLEUM MACHINERY CO.,LTD , http://www.jspmgroup.com
How to deal with the accumulation of gas in the roadway?
The gas accumulated in the roof space of the roadway can be treated in time by the following methods; the wind sleeve ventilation method. That is to say, a branch of the small air duct on the air duct is connected to the top of the roof of the roadway, and the accumulated gas is excluded; the wind deflecting method is adopted. That is, the baffle is nailed on the top beam of the roadway support, and the wind flow is led to the top of the roof, and the accumulated gas is blown off; the filling method is filled. That is, nail the wood or Jingjing on the top beam of the bracket, and then fill it with loess, sand or inert gas to block the space and eliminate the accumulated gas.