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Address: Sany Supporting Industrial Park, Economic and Technological Development Zone, Loudi City, Hunan Province

Mining shotcrete truck

The SRSP21J‑B underground shotcrete machine, designated UPS20J under the Mine Safety standard, is a brand‑new, compact wet‑spraying unit specifically engineered for underground mining. It features a robotic spray arm designed to meet the demands of wet‑sprayed support in mine tunnels and has been developed to address the unique challenges of such applications. Compared with conventional methods, this equipment delivers significantly higher productivity and better control over rebound rates. Utilizing high‑pressure, close‑range spraying, it elevates spray quality to a new level and is widely employed for wet‑sprayed concrete support in underground mines and small to medium‑sized underground projects. Powered by a diesel engine with four‑wheel drive and equipped with an articulated tire‑based undercarriage, it offers agile, rapid relocation, can handle gradients of up to 20°, and incorporates an onboard air compressor and an accelerating‑agent dosing system. Remote control further enhances operational safety and efficiency.

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Non-Coal Mine Product Series

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Product Details

Product Introduction

The SRSP21J‑B underground shotcrete machine, designated UPS20J under the Mine Safety standard, is a brand‑new, compact wet‑spraying unit specifically engineered for underground mining. It features a robotic arm designed to meet the demands of wet‑spray support in underground mines. This equipment significantly outperforms conventional methods in both production efficiency and rebound control, employing high‑pressure, close‑range spraying to elevate spray quality to a new level. It is widely used for wet‑spray concrete support operations in underground mines and small to medium‑sized underground projects. Powered by a diesel engine with four‑wheel drive and equipped with an articulated tire‑based undercarriage, it offers agile, rapid relocation, with a gradeability of up to 20°. The machine incorporates an onboard air compressor and a rapid‑setting admixture dosing system, along with remote‑control capabilities, ensuring safe and efficient operation.

Product Features

·High efficiency: piston-type pumping system, with a maximum delivery rate of 20 m³/h;

·Wide operating range: 2 × 7.4 m wide, 8.8 m high, with a 3-m under‑clearance; the telescopic and rotary intelligent robotic arm is specifically designed for spraying operations in narrow tunnels.

·High power: The main pump is equipped with a 55 kW motor, meeting pumping requirements.

·No dead zones: Intelligent spray operation ensures high precision, a wide spray coverage, and minimal blind spots.

·Efficient wireless control: wirelessly operate all spraying functions and adjust additive ratios on the fly, enhancing the working environment.

·Automatic adjustment of accelerating admixture dosage for reduced rebound: An intelligently controlled electro-hydraulic proportional‑control system, managed by a PLC, automatically optimizes the accelerating admixture dosage based on the concrete spray rate, thereby minimizing rebound.

·Wide adaptability to operating conditions and environments, with flexible relocation: four-wheel drive, articulated steering, and a side‑mounted cab; the machine features a compact overall structure and a small turning radius, specifically designed for operation in underground mines and other narrow tunnels.

Product Specifications

Specification and Model	Parameter	Specification and Model	Parameter
Maximum spray range	8m	Bending radius	≥R3700
Jet height / jet width		Drive	Four-wheel drive
Minimum spray range	2.5/3.3m	Driving speed	Max 15 km
Jet height / jet width		Slope gradient	20°
Telescoping length	3m	Braking system	Wet type
Jetting action	6 axes (pitch, yaw, roll, extension/retraction, and left/right rotation)	Work lamp	12 units, 24V/70W
Spray nozzle		Cab	FOPS/ROPS certification for fall‑object protection and rollover protection; adjustable lateral driver’s seat, hydraulic suspension, and equipped with a safety belt.
Nozzle rotation about the longitudinal axis of the boom		DO hydraulic oil tank	300L
Nozzle oscillation about the longitudinal axis of the arm	360°	Storage battery	2 units, 12V/80A
Nozzle	DN90/240°	Diesel tank	70L
Spray nozzle	10° deflection angle, 360° infinite rotation	Cable reel
Three-ear remote control	The component’s operation can be controlled via the remote control.	Operation	Automatic + Manual
Drive	Electric, dual operating mode (wireless/wired)	Cable length	60 m (standard)
Push-drive concrete pump		Power supply	380V
Form	Dual-piston, hydraulically driven	Drum diameter	100mm
Maximum spray volume (theoretical value)	20 m³/h	Weight	11T
Concrete pump cylinder bore diameter	160mm	Overall vehicle dimensions (length × width × height)	7200mm1800 2200 mm (excluding the 7200 mm boom)
Maximum concrete delivery pressure	65bar	Additive metering pump – synchronized with concrete
Maximum aggregate size	16mm	Adjustment range	50-600L/h
Material receiving height	1280mm	Maximum working pressure	7.5bar
Motor power	55KW	Additive tank	200L
Power supply	380V	Control system	PLC
Three‑axle articulated off‑road chassis with four‑wheel drive		High-pressure cleaning pump
Engine	Four-cylinder turbocharged diesel engine	Maximum pressure	140bar
Engine power	96KW	Traffic	10.8L/min
Engine emissions	Meets China IV emission standards	Water pipe	15m
Transmission device	Static Hydraulic Transmission	Air compressor
Maximum airflow	9.5 m³/min	Maximum working pressure	7.5bar
Turn	Center hinge, hydraulic cylinder power steering	Maximum airflow	9.5 m³/min