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UD391H Single-boom Development Drilling Rig

The UD391H hydraulic development drilling rig for mining is a compact and agile single-boom, electronically controlled hydraulic drilling rig designed for underground mine roadways and engineering tunnels excavation operations, with a maximum working cross-section of 34 m². Equipped with a Sandvik 20kW rock drill, it achieves high-speed, steady-rate drilling in various rock types, effectively extending drill bit service life. The robust LG-B26F drill arm features a 360° rotating thrust beam with an outstanding self-leveling function, providing broader and more optimal section coverage. This enables rapid, stable, and precise tunneling drilling as well as versatile drilling operations.

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Product Advantages

1. High Reliability

The UD391H hydraulic development drilling rig adopts high-quality components from internationally recognized brands, including Rexroth, Parker, Eaton and Schneider. These carefully selected hydraulic and electrical components support stable system operation and reliable performance during demanding underground mining and tunneling operations.

2. Easy to Operate

Equipped with an LG-B26F boom and an automatic self-leveling thrust beam, the UD391H provides flexible drilling coverage and convenient boom positioning. Its rock-adaptive drilling control system features impact tracking and anti-clamping functions to help maintain stable drilling performance and reduce drill steel jamming. The ergonomic arrangement of travel and drilling controls, combined with a wide operator field of view, makes daily operation more convenient.

3. Easy to Maintain

The UD391H is designed with accessible pressure measurement points, allowing operators and maintenance personnel to check system pressure conveniently. Its maintenance-friendly layout supports routine inspection and servicing of key components, helping simplify daily maintenance procedures and reduce unnecessary service interruptions.

4. High Safety

The UD391H is equipped with an FOPS & ROPS-certified operator cabin to provide protection against falling objects and rollover hazards. Integrated safety warning and interlock systems help operators identify potential risks and prevent unsafe operating conditions, supporting safer underground drilling operations.

Parameters

Weight (kg)	12,800
Transport height (mm)	2,350/2,885
Transport width (mm)	1,800
Transport length (mm)	10,600/11,400
Steering Angle (°)	±35
T-section width in turning (mm)	2,890 / 3,130
Hole depth (mm)	3,440 / 4,050
Hole diameter (mm)	32-45
Boom	LG-B26F
Feed	LG-（CF）3700 / LG-（CF）4300
Rock drill (kW)	Sandvik LD60/ 20 （LD70 for option）
Coverage area (m²)	34

Hydraulic Development Drilling Rig for Underground Mining and Tunneling

The UD391H is a hydraulic development drilling rig for mining, designed for underground mine roadways and engineering tunnel excavation with working cross-sections of up to 34 m². Its single-boom hydraulic drilling system, 20 kW rock drill and 360° self-leveling feed beam support accurate face drilling across different rock conditions.

Unlike surface blasthole drilling equipment, the UD391H is developed for underground excavation environments where drilling coverage, boom positioning and machine maneuverability are essential. It helps mining contractors carry out face drilling operations within the designed roadway or tunnel profile.

360° Boom Coverage and Hydraulic Drilling Control

The UD391H features an LG-B26F drilling boom with a 360° rotating thrust beam and automatic self-leveling capability. This design allows the operator to position the feed beam across different drilling points while maintaining the required drilling direction.

Its rock-adaptive hydraulic drilling control system incorporates impact tracking and anti-clamping functions to help maintain stable drilling operations and reduce the risk of drill steel jamming.

Combined with the Sandvik 20 kW hydraulic rock drill, the system supports consistent drilling performance and efficient face drilling in underground mining and tunneling projects.

How to Select the Right Hydraulic Development Drilling Rig

When choosing a hydraulic development drilling rig for mining, buyers should first consider the required working cross-section, drilling depth and underground operating conditions.

The UD391H supports working cross-sections of up to 34 m². For smaller underground roadways with working cross-sections of up to 24 m², buyers can also consider the UD291 single-boom development drilling rig.

Before purchasing, confirm the following project requirements:

Underground roadway or tunnel cross-section
Required hole diameter and drilling depth
Rock type and geological conditions
Drilling pattern and required hole positioning
Underground turning space and transportation dimensions
Required hydraulic rock drill and feed configuration

Proper equipment configuration helps match drilling coverage and operating capability to the actual excavation requirements.

For ongoing equipment maintenance, HCLH also provides drilling rig spare parts to support mining equipment procurement.

FAQ

Do you provide technical support?

Yes. We provide professional pre-sales, in-sales, and after-sales support, along with expert technical guidance and usage precautions.

Sales Coverage

We supply specialized products to customers worldwide.

Do you provide technical support?

Yes. We provide professional pre-sales, in-sales, and after-sales support, along with expert technical guidance and usage precautions.

Warranty Policy

We provide repair service if there is necessary

Payment Methods

30% advance payment,70% balance payment before shipment