Mobile concrete pump YG series

for tunnelundergroundfor underground mining

Overview
Over the past decade underground construction and slope-stabilization works have moved from dry spraying to wet shotcrete methods. A wet shotcrete machine uses pre-mixed concrete to reduce rebound, lower airborne dust and improve operational control compared with dry rigs. Typical modern units combine a stable chassis, precise double-cylinder hydraulic pumps and integrated accelerator dosing for consistent set times.

Key benefits & features

• Lower rebound: typically reduced from ~30% (dry) to under 10% with wet spraying
• Reduced dust generation for better working conditions in tunnels and confined spaces
• Integrated accelerator dosing system maintains consistent set times
• Double-cylinder hydraulic pumping ensures smooth concrete flow and reliable aggregate handling
• Suitable for tunneling, mining and slope-stabilization projects
• Optional robotic spraying arm for automated, high-safety operation (typical robotic output 20–30 m³/h)

Practical tips

• For high-altitude or long-distance tunnels select a pump with main-pump pressure around 15–20 MPa.
• Diesel-powered units are recommended for outdoor slope protection where long power cables are impractical.
• Verify spraying-arm rotation angle and reach radius to cover the largest tunnel cross-section on your project.
• Ensure the accelerator pump is linked to the main pump so dosing ratios remain correct when machine speed changes.

Case summary
A Chilean mining contractor replaced older dry rigs with a wet shotcrete machine fitted with a remote wireless spraying arm and adjusted accelerator dosing. Rebound reduced to ~12%, operating costs fell by 22% and underground support works finished 15 days ahead of schedule.

Wet shotcrete machine parameters

• Models: YG-3016 | YG-4016
• Overall length: 7770 mm | 7880 mm
• Overall width: 2460 mm | 2460 mm
• Overall height: 3180 mm | 3380 mm
• Rated weight: 14 T | 15 T
• Minimum turning radius: 10.8 m | 11.5 m
• Maximum gradeability: ≥40° | ≥40°
• Engine power: 85 kW | 103 kW
• Wheelbase: 3900 mm | 4100 mm

Boom and outrigger parameters

• Spraying height: 16 m | 16 m
• Spraying width: 25 m | 25 m
• Main boom luffing angle: 0°–65°
• Secondary boom luffing angle: -110°–90°
• Boom slewing angle: 310°
• Nozzle axial rotation: 360°
• Nozzle vertical oscillation: 240°
• Nozzle sweeping angle: 360°
• Front outrigger ground contact center distance: 2480 mm
• Rear outrigger ground contact center distance: 2480 mm
• Front-to-rear outrigger center distance: 5850 mm

Pumping system parameters

• Concrete output: 30 m³/h | 40 m³/h
• Hopper capacity: 0.4 m³
• Concrete discharge pressure: 7.5 MPa
• Accelerator pump max discharge pressure: 1.8 MPa
• Concrete pipe diameter: Φ90 mm
• Nozzle outlet diameter: Φ50 mm
• Main oil cylinder: Φ100 mm × Φ70 × 1000
• Conveying cylinder: Φ180 mm × 1000
• Electric motor: 55 kW | 75 kW

Frequently asked points

• Difference vs dry rigs: dry rigs add water at the nozzle causing higher dust and rebound; wet rigs use pre-mixed concrete for stronger bonds and lower dust.
• Hourly output: commercial wet shotcrete machines typically deliver 10–40 m³/h depending on cylinder size and site setup.
• Main wear parts: rubber nozzles, wear plates, cutting rings and delivery hoses — keep spare wear-part packages on site.

Technical specifications

• Models: YG-3016, YG-4016
• Dimensions (L×W×H): 7770×2460×3180 mm (YG-3016); 7880×2460×3380 mm (YG-4016)
• Rated weight: 14 T (YG-3016), 15 T (YG-4016)
• Engine power: 85 kW (YG-3016), 103 kW (YG-4016)
• Spraying reach: height 16 m; width 25 m; boom slewing 310°; nozzle rotation 360°
• Pumping output: 30 m³/h (YG-3016) / 40 m³/h (YG-4016)
• Hopper capacity: 0.4 m³; concrete pipe Φ90 mm; nozzle Φ50 mm
• Concrete discharge pressure: 7.5 MPa; accelerator pump max 1.8 MPa
• Drive & pump: double-cylinder hydraulic pumping; main oil cylinder Φ100 mm × Φ70 × 1000; conveying cylinder Φ180 mm × 1000
• Electric motor options: 55 kW / 75 kW