The current shotcrete machine is a new type of product produced through research and development. The shotcrete machine can become a representative of new products, of course, it also has certain advantages. It has a simple structure and is easy to operate and maintain. The shotcrete machine is mainly used in railway tunnels, high-rise buildings and diversion culverts, etc. As a large-scale engineering construction equipment, shotcrete machine itself has corresponding risks. Investigators for these risk issues also got the response from operators during the investigation. For example, spraying the sprayer in the coal mine will also bring dangers, such as anti-electric shock, transportation, spraying, etc. The editor also made the following analysis of these risk sources:
1. Shotcrete:
① Requirements for spraying slurry.
② Precautions when cleaning the shotcrete machine.
③ The condition of roof rock and support.
④ The distance between the shot surface and the shot tube
2. Air supply:
① The intact condition of the shotcrete pipe and the problem of explosion-proof cracking
② Whether the binding of wind and water pipe joints is reliable.
③Precautions when blowing the shotcrete pipe with compressed air.
3. Protection against electric shock:
① The explosion-proof condition of the spray gun switch is intact.
② Switch off power after spraying to prevent accidental start.
③ The explosion-proof condition of the shotcrete machine.
④ The load cable suspension and intact condition of the shotcrete machine.
