Key features:
Robotic Arm Reach: Often extendable to 6–10 m or more, suitable for tall tunnel crowns, deep slopes, or high retaining walls.
Precision Control: Remote control or cabin-operated joysticks for accurate nozzle positioning and uniform spray thickness.
Wet Shotcrete Process: Pumps premixed wet concrete through a hose to the nozzle, where compressed air and accelerator (if used) are added.
Stable Base: Usually truck-mounted or crawler-mounted for mobility and stability on uneven terrain.
Safety & Efficiency: Keeps operators at a safe distance from rebound and falling debris while improving spraying speed and quality.
Typical applications:
High tunnel vault shotcreting
Steep slope protection projects
Large underground caverns
Dam spillway reinforcement
Mining excavation support
If you want, I can give you a quick comparison chart of high-arm wet spraying machines vs. standard-arm ones so you can see where they're most useful.
