Shotcreting Machine Safety Operation Rules

1.Before construction, must make sure the tools, equipment, and raw-material is complete and intact.
2.Make sure the construction place safe before shortcreting, draw out the pumice of shortcereting area. Take the strong scaffolding at the higher place.
3.Before flushing roof and wall, protect all the electrical equipment, in order to prevent damaging the insulation and shotcreting machine.
4.Before Shotcreting, flush the top and wall of the roadway,use the shotcreting machine to spray when rock moist.
5. Required raw-material for the Shotcreting machine.
—- cement: common cement whose quality level should be higher then 400#.
—- Sand: should be silver sand whose particles in 2 mm below, soilless , and then should be sieved before use.
—- Water: should be clean water, if there is impurity or silt in the water, should pass precipitation or filtration then be reused.
6.Mortar should be mixed evenly,defined amount,can not have remaining.Load mortar into shotcreting machine as far as possible,in case precipitation and gushing out.
7.Forbid starting shotcreting machine or mortar pump when detect mortar concentration.
8.Right quantity of calcium chloride or some other accelerator should be added into the gunning material if there is water in the construction plate.
9.Nozzleman should be clothed raincoat, rubber gloves,safety goggles,dust mask.
10.Nozzle should spray two sides first and roof later,the length should be about 2 meters every time.
11.When spraying, nozzle should move in semicircle According to the semicircle way, horizontal direction, up. Make shotcreting material at right angles with wall.
12.Spray as evenly as possible, general three times, and 35-50mm each time.Pay attention to the changes of pressure gauges and nozzle outputing.
13.Inspect pipe continuous,avoid jam, at the same time, make sure around person safty.
14.In shotcrete,there should be one special man who manage and control Air suction valve and next makings valve, and this man should be under nozzleman’s command.