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Underground Tunnel Shotcrete Machine – Automatic Wet-Mix Concrete Spraying System – Mining & Civil Engineering – For Sale

22 Dec 2025
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Main Features

◆ Highly cost-effective, stable and reliable.

◆ Advantage of boom: two-stage telescopic and two-stage slewing, with no blind spots in operation.Particularly competent for: small-scale working surfaces on single and double side walls, working surfaces with large invert volumes (without moving the vehicle), working surfaces on central deep ditch, working surfaces on foundation pit slope support, working surfaces on the side holes of civil air defense tunnel walls (can be turned back without moving the vehicle), working surfaces on the top support of horizontal tunnels/inclined shafts, and working surfaces on reverse tunnel portals.

◆ Hydraulic control: Electric load-sensitive proportional control multi-way valve, compared with other brands of switch valves, the action is more sensitive and smooth, without delay, the operation center point is stable, the spraying quality is more controllable, and the flatness is high. The speed of each arm movement can be steplessly adjusted and wirelessly remote controlled.

◆ Engineering chassis: four-wheel drive, four-wheel steering, with inclined and eight-way walking function, good passability.

◆ Upgrade the pumping system, optimize the pipeline combination, low pumping pressure, and wider adaptability to materials.

◆ The 1000L+500L dual accelerator barrel design is adopted to meet the needs of large-scale spraying construction at one time.

Main Technical Data:

Chassis system	Internal combustion-hydraulic torque converter transmission, four-wheel drive, four-wheel steering
Engine	YUNNE brand output power: 92KW/2400rpm
Transmission system	Hydraulic transmission system
Travel speed	Low speed gear 0-5km/h, high speed gear 0-15km/h
Climbing ability	40%(22°)
Minimum Ground Clearance	400mm
Suspension Swing Angle	±10°enables the chassis better adapt to uneven road surfaces
Steering	Hydraulic four-wheel steering, with diagonal and figure eight travel functions
Minimum Turning Radius	Inside 3500mm, outside 7300mm
Weight	17t
Overall Dimension	8970x2500x3500mm(LxWxH)

Concrete transfer pump	AWT-SPJ30 hydraulically driven piston concrete pump, automatic fast switching S-type pendulum valve, hopper equipped with vibrating screen and bottom-opening discharge gate
Pumping transfer capacity	30m3/h, 4-30m3, adjustable
Maximum conveying pressure	8MPa
Aggregate size	16mm

Electro-hydraulic power packs
Electric motors	55KW/1480rpm; protection grade:IP54
Hydraulic pumps	Latest optimized pumping system, stable and reliable performance. Main pumps and valves adopt international and domestic famous brand.

Shotcrete robotic arm	The two-stage telescopic and two-stage rotating spraying arm is fully hydraulically controlled and the small arm is folded, so there is no blind spot in operation. It can be operated by both wired and wireless remote control, and the speed of each movement of the arm can be adjusted, with stepless speed regulation.
Maximum shotcrete height	16m
Maximum shotcrete width	30m
The farthest shotcrete distance	15m (front)
Minimum shotcrete tunnel height	4m
Maximum shotcrete depth	8m (below parking surface)
Pitch angle of small boom	-90° ~ +90°
Pitch angle of large boom	-30° ~ +65°
Two-stage telescoping	Two-stage telescopic boom
Large arm rotation	270 Slewing
Small arm rotation	360°swing, large and small arms can be folded by 0°.

Double speed coagulant barrel	1000L+500L

Cable reel	Hydraulic motor driven rewinding
Cable specification	Cable specification 3x35+1*16

Accelerating coagulant transfer pump	Hydraulic motor drive, electro-hydraulic proportional control
Output capacity	30-1000L/h
Control	Realization of remote control and human-machine interface (display), both can control the specific flow

Shotcrete piping and accessories	Concrete pump outlet hinged pipe, DN125-100 reducer and DN90 delivery pipe, additive and compressed air injection device, and flow changer, etc.

(Standard configuration)	High-pressure cleaning system, reversing camera, self suction pump for accelerator
	(1) High-pressure cleaning system: plunger-type high-pressure water pump, hydraulic motor drive, with cleaning hose and water gun
	(2)Reversing camera.
	(3)self suction pump for accelerator