1. The shotcreting machine used to spray concrete is generally operated by two people. During the construction process, the two personnel should closely cooperate with each other and find that the problem is solved in a timely manner. The sprayer should control the water-cement ratio so that the material is not white, flowing, and surface. Shine is appropriate.
2. When spraying, it is necessary to grasp the jetting angle and jetting distance, and the nozzles strive for vertical rock face. The injection sequence is generally from the bottom up, from the back to the front, fill the pit fill level and then press the regular operation, do a one-time injection in the end.
3. Before the spraying machine starts, it is necessary to remove large pieces of vermiculite and debris from the machine to prevent blocking of the pipe. After the feed material is stopped, it is necessary to wait until all the materials in the material chamber and feed tube are blown off and then shut down, and clean the inside and outside of the machine.
4. When the spraying machine blows air, it is necessary to fix the nozzle to prevent the nozzle from swinging and hurting people. When dealing with blocked pipe, it is not allowed to bring wind or increase wind pressure treatment. To stop the wind, open the air release valve to hit the blocked pipe, then close the air release valve for air supply and power transmission.
5, pay attention to adjust the wind pressure, water pressure, reduce rebound, reduce dust concentration.
6. When spraying concrete in the seepage section of the roadway, measures should be taken to reduce the amount of water, increase the amount of accelerators to be mixed in, and guide the water pipes.
7. Strengthen personal protection and wear dust masks as required to reduce the harm of occupational diseases.
8, when the spray is in the flat lane position, the mine car should be fixed with a temporary stop car, and it is forbidden to mix in the mine car.
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