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UDL391RH Long Hole Drilling Rig

The UDL391RH is designed for deep-hole drilling in roadways measuring 3.9×3.9m and larger. Featuring a simple yet practical design, it delivers high reliability, high productivity, and low operating costs. It is equipped with a high-power diesel engine, heavy-duty four-wheel drive, an articulated steering chassis and a FOPS-certified safety canopy. The integrated 22 kW Sandvik LD120SH hydraulic drill delivers high-speed, steady-rate drilling in various rock formations, thereby extending the service life of drilling bit. The THC drilling hydraulic system features automatic control functions, enabling operators to focus on safe, rapid and precise drilling. Its optimized layout balances driving stability with excellent operator visibility and offers user-friendly operation and excellent maintainability. All routine maintenance can be performed on the ground.

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Product Advantages

1. High Reliability and Stable Drilling Performance

The UDL391RH is equipped with a 22 kW Sandvik LD120SH hydraulic rock drill, delivering stable drilling performance across different rock formations. Key hydraulic and electrical components are sourced from internationally recognized brands, including Rexroth, Parker, Eaton and Schneider. The combination of reliable components and a heavy-duty drilling system supports continuous underground production operations and helps extend drilling tool service life.

2. Intelligent Drilling Control and Easy Operation

The UDL391RH features a THC hydraulic drilling control system with automatic control functions. Its rock-adaptive drilling system incorporates impact tracking and anti-clamping functions to help maintain consistent drilling performance and reduce the risk of drill rod jamming. The automatically leveling feed beam and ergonomic arrangement of travel and drilling controls make drilling operations easier to manage while providing operators with a clear working view.

3. Excellent Underground Mobility

Designed for underground mining environments, the UDL391RH adopts a heavy-duty four-wheel drive system and articulated steering chassis. This configuration provides the traction and maneuverability required for moving between drilling positions in underground roadways. Its optimized machine layout balances driving stability with operator visibility, supporting efficient equipment positioning during mining operations.

4. Easy Maintenance and Operator Protection

The UDL391RH features an accessible machine layout that allows routine maintenance to be performed from ground level, reducing the need for elevated service operations. Convenient pressure measurement points simplify hydraulic system inspections and troubleshooting. In addition, the FOPS-certified safety canopy provides protection against falling objects, supporting safer working conditions in underground mining environments.

Parameters

Rock drill (kW)	LD120SH, 22kW
Rod Length (mm)	1,525（Std.）（1,220/1,830）
Hole Diameter (mm)	60-127
Pivot point height (mm)	1,650
T-section width in turning (mm)	3,200
Min. tunnel height×width (mm)	3,900×3,900
Max. tunnel height width (mm)	5,200×5,990
Transport dimension (W×H×L) (mm)	1,850×7,390×3,250
Weight (kg)	16,500

Long Hole Drilling Rig for Underground Mining

The UDL391RH is a long hole drilling rig developed for underground production drilling in roadways measuring 3.9 × 3.9 m and larger. It is designed to support deep-hole drilling operations in underground mines, where drilling stability, equipment mobility and reliable hydraulic performance are essential.

Equipped with a 22 kW Sandvik LD120SH hydraulic rock drill and an automatic THC drilling control system, the UDL391RH provides a practical solution for mining contractors requiring consistent drilling performance across different rock formations.

For projects requiring face drilling during underground roadway development, HCLH also offers the UD391H single-boom development drilling rig, designed for development drilling rather than long-hole production drilling.

How to Select a Long Hole Drilling Rig for Mining

Selecting a suitable long hole drilling rig requires evaluating the underground working environment and drilling requirements.

Underground Roadway Dimensions: Confirm the minimum roadway height and width to ensure sufficient space for equipment operation and positioning.
Hole Diameter and Rod Configuration: Match the required hole diameter and drill rod length to the mining plan and production requirements.
Rock Conditions: Consider rock hardness and geological variations when selecting the hydraulic rock drill and drilling tools.
Equipment Mobility: Evaluate four-wheel drive performance, steering configuration and available turning space in underground roadways.
Maintenance Accessibility: Check the accessibility of hydraulic components, service points and replacement parts to support routine maintenance.

Choosing equipment according to these factors helps mining operators match drilling capacity and machine configuration to actual underground production requirements.

HCLH also supplies drilling rig spare parts to support equipment maintenance and replacement needs.

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