KJ211 Single Boom Hydraulic Underground Jumbo Drill Rig for Mining Development

The KJ211 Hydraulic Development Drill Rig is a high-performance underground drilling machine designed for mine development and tunnel excavation in hard rock conditions. Featuring a robust universal boom, a 360° rotating feed beam, and a high-frequency hydraulic rock drill, it delivers fast, precise, and efficient drilling of vertical, inclined, and horizontal blast holes. Its powerful four-wheel-drive articulated chassis provides excellent mobility and stability in underground workings. Suitable for tunnel sections ranging from 7 m² to 25 m², the KJ211 is an ideal solution for underground mining, tunneling, and rock bolting applications, offering high productivity, reliability, and easy maintenance.

Quzhou Mazellion Heavy Industry Technology Co., Ltd. is a professional manufacturer of diesel screw air compressors and mining drilling equipment, serving global mining, quarry, water well drilling, and construction projects. We provide factory-direct supply, stable quality, and full OEM customization to help customers win local markets with better cost performance and reliability.

To start cooperation: send your inquiry → get a tailored technical solution & quotation → confirm order → production & testing → fast shipment → long-term spare parts & technical support. We respond quickly and support you throughout the whole project.

Drilling Rig Specification Table

Dimensions and Weight

Safety Protection

Air & Water System

Chassis

Drilling System

Electric Hydraulic Power Unit

1. Underground Mine Development Drilling

Designed for mine development and production preparation in underground metal and coal mines. Capable of drilling vertical, inclined, and horizontal blast holes for tunnel advancement and ore body access construction.

2. Tunnel Excavation Projects

Widely used in railway tunnels, highway tunnels, hydropower tunnels, and municipal underground engineering. Provides fast and accurate face drilling for drill-and-blast excavation methods.

3. Hard Rock Drift and Crosscut Construction

Ideal for driving drifts, crosscuts, and access tunnels in hard-rock formations. The hydraulic rock drill delivers high penetration rates and reliable performance in demanding geological conditions.

4. Underground Infrastructure and Cavern Development

Suitable for underground powerhouse caverns, pumping stations, storage caverns, and other large underground structures requiring precise blasting hole drilling and controlled excavation.

5. Roof Bolting and Secondary Support Operations

The versatile boom system can also perform roof bolting and rock reinforcement drilling, making it suitable for tunnel stabilization and underground ground support applications.

6. Hydropower and Underground Civil Engineering

Suitable for underground construction projects involving water diversion tunnels, utility tunnels, metro connections, and civil engineering excavations in hard rock conditions.

1. Excellent Underground Drilling Performance

The KJ211 is specially designed for mine development and tunnel excavation, delivering efficient drilling performance in medium-hard and hard rock formations.

2. Wide Drilling Coverage

The robust universal boom provides optimal face coverage for tunnel sections ranging from 7 m² to 25 m², reducing repositioning time and improving productivity.

3. Precise Hole Positioning

The feed beam can rotate 360° and automatically maintain level alignment, enabling fast and accurate positioning for vertical, inclined, and horizontal blast-hole drilling.

4. Multi-Function Operation

In addition to blast-hole drilling, the boom can be used for rock bolting and cross-cut excavation, increasing equipment utilization and reducing operating costs.

5. Superior Mobility

The powerful four-wheel-drive articulated chassis offers excellent traction, flexibility, and stability, allowing safe operation in narrow underground drifts.

6. High Drilling Efficiency

Equipped with a high-frequency hydraulic rock drill and stepped-piston technology, the KJ211 achieves faster penetration rates, lower drilling tool consumption, and improved reliability.

7. Operator-Friendly Design

The machine layout provides excellent visibility, a spacious working area, and automated functions that help operators drill safely, accurately, and efficiently.

8. Easy Maintenance

Key service and maintenance points are well protected while remaining easily accessible, minimizing downtime and maintenance costs.

Q1:What type of underground projects is the KJ211 suitable for?

The KJ211 is suitable for underground mining development, drift driving, tunnel excavation, and rock bolting operations in hard-rock environments.

Q2:What tunnel sizes can the KJ211 work in?

The machine is designed for underground tunnels and drifts with cross-sectional areas between 7 m² and 25 m².

Q3:Can the KJ211 drill different hole angles?

Yes. The rig can drill vertical, horizontal, and inclined blast holes thanks to its flexible boom system and 360° rotating feed beam.

Q4：What rock conditions can the machine handle?

The KJ211 is designed for medium-hard to hard rock formations commonly found in underground mining and tunneling projects.