📦 Underground Mining Drilling Rigs

Kaishan KJ422 Underground Drill Rig

Name: Kaishan KJ422 Underground Drill Rig
Brand: Kaishan
SKU: KJ422
Availability: InStock

Model: KJ422

The Kaishan KJ422 is a compact underground drill rig engineered for efficient drilling in mining and tunneling operations. Designed for underground drill rig applications, it delivers reliable performance in confined spaces with a robust boom and feed system. The KJ422 supports both DTH and rotary drilling methods, achieving hole diameters from 76 mm to 152 mm and drilling depths up to 100 meters. Powered by a 74 kW diesel engine, it combines strong drilling capability with maneuverability. Its articulated chassis and four-wheel drive ensure stable positioning on rough underground terrain. The rig features a hydraulic control system for precise boom movement, reducing operator fatigue and improving accuracy. With a compact footprint of 6,800 × 2,100 × 2,600 mm and a weight of 9,500 kg, the KJ422 is easy to transport and set up in narrow drifts. Ideal for mining development, tunnel support, and underground water well drilling, this rig offers a cost-effective solution for contractors seeking dependable underground drilling equipment.

Best For

Underground Mining Development Tunnel Excavation Underground Water Well Drilling Ground Support

Technical Specifications

Model	Kaishan KJ422
Impact Pressure	180-200bar
Hole Diameter	76-152 mm
Drilling Method	DTH / Rotary
Engine	Cummins qsb5.9-c160
Weight	22000 kg
Dimension (L×W×H)	15000 × 2,550 × 2,400 mm

Get a Quote Check Fit

Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan KJ422 is a purpose-built underground drill rig designed to meet the demanding requirements of mining and tunneling projects. As a member of Kaishan's underground drill rig series, the KJ422 combines compact dimensions with powerful drilling capabilities, making it an ideal choice for operations where space is limited but productivity cannot be compromised. This rig is engineered to drill both DTH and rotary holes, providing versatility for various underground applications. ## Technical Features The KJ422 is equipped with a robust hydraulic system that ensures smooth and precise control of the boom, feed, and rotation functions. Its articulated chassis and four-wheel drive allow for excellent maneuverability in narrow tunnels and uneven ground. The rig features a heavy-duty feed beam that supports efficient drilling with minimal deviation. Powered by a 74 kW diesel engine, it delivers reliable performance while maintaining fuel efficiency. The drilling depth reaches up to 100 meters, with hole diameters ranging from 76 mm to 152 mm, suitable for a wide range of underground tasks. The operator's station is ergonomically designed for comfort and visibility, reducing fatigue during long shifts. ## Applications The KJ422 is widely used in underground mining development, tunnel excavation, and underground water well drilling. Its ability to operate in confined spaces makes it particularly valuable for mine galleries and shaft sinking. The rig can also be employed for ground support operations, such as drilling bolt holes and grouting holes. With its versatile drilling methods, it adapts to different rock formations, from soft to medium-hard rock. Contractors appreciate its reliability and low maintenance requirements, which contribute to reduced downtime and lower operational costs. ## Conclusion In summary, the Kaishan KJ422 underground drill rig offers a powerful, compact, and versatile solution for underground drilling challenges. Its combination of advanced hydraulics, durable construction, and operator-friendly design ensures high productivity and safety in the most demanding environments. Whether for mining, tunneling, or water well projects, the KJ422 stands out as a dependable partner for underground operations.

Technical Selection

Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.

Hole Diameter

76-152 mm

Impact Pressure

180-200bar

Weight

22000 kg

Dimension (L×W×H)

15000 × 2,550 × 2,400 mm

Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.

Check with an engineer

Key Advantages

✓

Compact design for narrow underground tunnels and drifts

✓

Powerful 74 kW diesel engine for reliable performance

✓

Drilling depth up to 100 meters with hole diameters 76-152 mm

✓

Hydraulic control system for precise boom and feed movement

✓

Four-wheel drive and articulated chassis for superior maneuverability

✓

Ergonomic operator station with excellent visibility

Applications

📍 Underground Mining Development

Drilling blast holes and production holes in underground mines.

Solution: The KJ422's compact size and powerful drilling capability allow efficient development of ore bodies with minimal dilution.

📍 Tunnel Excavation

Drilling holes for blasting and rock support in tunnel projects.

Solution: Its articulated chassis and hydraulic boom enable precise drilling in confined tunnel faces, speeding up excavation cycles.

📍 Underground Water Well Drilling

Drilling water wells in underground cavities or from underground stations.

Solution: The rig's DTH and rotary drilling methods provide flexibility to drill water wells in varied geological conditions.

📍 Ground Support

Drilling bolt holes, cable holes, and grouting holes for rock reinforcement.

Solution: With accurate hole positioning and efficient drilling, the KJ422 ensures stable ground support in mining and tunneling.

KJ Series Models

Compare specifications across the series to find the right model.

Model	Model	Impact Pressure	Hole Diameter	Drilling Method	Engine	Inquire
KJ422This model	Kaishan KJ422	180-200bar★	76-152 mm	DTH / Rotary	Cummins qsb5.9-c160	Get a Quote
KJ421	Kaishan KJ421	180-200bar	—	Hydraulic percussion	Cummins QSB3.9-C125	Get a Quote
KJ210	Kaishan KJ210	150bar	—	Hydraulic top hammer drilling	Cummins	Get a Quote
KAISHAN KJ310	Kaishan KJ310	130bar	32-76 mm	Rotary / DTH	—	Get a Quote
KAISHAN KJ311	Kaishan KJ311	130BAR	32-76mm	Hydraulic percussion + rotation	—	Get a Quote
KAISHAN KJ311D	Kaishan KJ311	130bar	32–89 mm	Top Hammer / DTH	—	Get a Quote
KJ211	Kaishan KJ211	130bar	—	Hydraulic Top Hammer	1.5KW	Get a Quote

Compare 2–3 models? Tick the boxes and send them together — we will quote each one for you.

Inquire All

Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.

Not sure which model fits your project? Send us your working pressure and air demand — our engineers will recommend the right one.

Get a Recommendation 💬 WhatsApp

Main Components

Diesel engine
Hydraulic pump and control valves
Boom and feed beam
Rotation head
Drill string and bit
Operator's cabin
Undercarriage with four-wheel drive
Air compressor (for DTH)

Working Principle

The Kaishan KJ422 underground drill rig operates on a hydraulic drilling principle, utilizing either DTH (down-the-hole) hammer or rotary drilling methods depending on the rock formation. In DTH mode, compressed air is directed to the hammer at the bottom of the hole, where it strikes the bit rapidly to crush rock. The rotation unit turns the drill string, ensuring even bit wear and a straight hole. In rotary mode, the rig applies torque and feed force to the bit, cutting through softer formations. The hydraulic system powers the boom, feed beam, and rotation head, allowing precise control of drilling parameters such as feed speed, rotation speed, and thrust. The operator controls all functions from an ergonomic panel, monitoring drilling progress and adjusting as needed. The rig's four-wheel drive and articulated steering enable positioning in tight underground spaces. The diesel engine provides power for both the hydraulic system and the compressor (if equipped) for DTH drilling. This integrated design ensures efficient energy use and reliable operation in challenging underground environments.

Detailed Features

▸Compact and maneuverable for underground spaces
▸High drilling efficiency with DTH and rotary methods
▸Robust hydraulic system for precise control
▸Durable construction for tough mining conditions
▸Ergonomic operator station for reduced fatigue
▸Easy maintenance with accessible components
▸Low fuel consumption and operational cost
▸Reliable performance with Kaishan quality

Packaging & Shipping

The Kaishan KJ422 underground drill rig is shipped in a disassembled state for efficient container transport. Main components are packed in sturdy wooden crates and steel frames, with all parts securely fastened to prevent movement during transit. The rig is typically loaded into a 40-foot high-cube container or flat rack, depending on configuration. Delivery time is approximately 30-45 days after order confirmation, depending on destination and customization. Shipping ports include Shanghai, Ningbo, or Qingdao, China. All export documentation and CE certification (if required) are provided.

After-Sales Service

Kaishan offers comprehensive after-sales service for the KJ422 underground drill rig. The product comes with a 12-month warranty or 2,000 operating hours, whichever comes first, covering major components. A 24-hour technical support hotline is available for troubleshooting and emergency assistance. We provide on-site installation and commissioning services, as well as operator training to ensure safe and efficient use. A global network of spare parts warehouses ensures quick availability of genuine parts. Regular maintenance reminders and service packages are offered to extend equipment life. Our dedicated service team is committed to minimizing downtime and maximizing your productivity.

Frequently Asked Questions

What hole diameter and drilling method does the Kaishan KJ422 support?+

The Kaishan KJ422 drills hole diameters from 76 mm to 152 mm using both DTH and rotary drilling methods. It is built for underground mining development and tunnel excavation. The rig is a member of the KJ series of underground drill rigs.

What engine powers the Kaishan KJ422?+

The Kaishan KJ422 is powered by a Cummins qsb5.9-c160 engine rated at 74 kW. This diesel engine supports reliable performance in underground conditions. The rig weighs 22,000 kg.

What impact pressure does the KJ422 require?+

The Kaishan KJ422 operates at an impact pressure of 180-200 bar. This pressure range supports DTH hammer drilling at hole diameters of 76-152 mm. The rig uses a hydraulic control system for precise boom and feed movement.

What are the dimensions of the Kaishan KJ422?+

The Kaishan KJ422 measures 15,000 × 2,550 × 2,400 mm (L×W×H). Its compact design suits narrow underground tunnels and drifts. The rig features an articulated chassis and four-wheel drive for maneuverability.

Where can the Kaishan KJ422 be used?+

The Kaishan KJ422 is suited to underground mining development, tunnel excavation, underground water well drilling and ground support. It drills hole diameters of 76-152 mm with DTH or rotary methods. The four-wheel drive and articulated chassis support stable positioning on rough underground terrain.

How is the Kaishan KJ422 packaged and shipped?+

The Kaishan KJ422 is shipped disassembled for efficient container transport, with main components packed in wooden crates and steel frames. It is typically loaded into a 40-foot high-cube container or flat rack, depending on configuration. Delivery time is approximately 30-45 days after order.

What warranty and after-sales service come with the KJ422?+

The Kaishan KJ422 comes with a 12-month warranty or 2,000 operating hours, whichever comes first, covering major components. A 24-hour technical support hotline is available for troubleshooting and emergency assistance. On-site installation, commissioning and operator training are also provided.

What are the key features of the Kaishan KJ422 underground drill rig?+

The Kaishan KJ422 offers a compact design for narrow underground tunnels and drifts, with a 74 kW diesel engine and drilling depths up to 100 meters. It supports hole diameters of 76-152 mm using DTH and rotary methods. A hydraulic control system provides precise boom and feed movement.