KJ311 Single Boom Hydraulic Underground Jumbo Drill Rig for Hard Rock Mining

The KJ311 Hydraulic Mining Development Jumbo is designed for underground hard-rock drilling in tunnel sections ranging from 12–35 m². It is widely used in underground metal mines, gold mines, hydropower projects, railway and highway tunnel construction, as well as other underground infrastructure projects. The machine is suitable for face drilling, drift development, cross-cut excavation, and rock bolting operations, providing efficient and reliable performance in medium-to-hard rock conditions.

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 Metal Mining Development

Widely used in gold, copper, iron ore, zinc, nickel, and lead mines for drift development, crosscut excavation, and production preparation. The KJ311 provides fast and accurate face drilling to improve advance rates and mining productivity.

2. Hard Rock Tunnel Excavation

Ideal for railway tunnels, highway tunnels, hydropower tunnels, and underground civil engineering projects. Its high-frequency hydraulic rock drill delivers excellent penetration performance in medium to hard rock formations.

3. Large Cross-Section Underground Drifts

Designed for underground workings with cross-sections ranging from 12–35 m². The robust boom system provides complete face coverage, making it suitable for large mine drifts, haulage tunnels, and service galleries.

4. Face Drilling and Blast Hole Construction

The 360° rotating boom and automatic parallel drilling capability enable efficient drilling of face holes, perimeter holes, and cut holes, ensuring precise blasting results and reduced overbreak.

5. Rock Bolting and Ground Support Operations

The versatile boom can also be used for rock bolt hole drilling and ground support applications, helping improve tunnel stability and workplace safety during excavation activities.

6. Underground Infrastructure and Hydropower Projects

Suitable for the construction of underground power stations, water diversion tunnels, pump chambers, utility tunnels, and other large-scale underground infrastructure projects requiring reliable drilling performance.

Key Advantages of KJ311 Hydraulic Mining Development Jumbo

1. Compact Design for Narrow Tunnels

With a width of only 1.75 meters, the KJ311 operates efficiently in underground tunnels and mine drifts with cross-sections ranging from 12–35 m².

2. Fast and Accurate Drilling

The 360° rotating feed beam with automatic leveling enables quick hole positioning, improving drilling accuracy and productivity.

3. High Drilling Efficiency

Equipped with a high-frequency hydraulic rock drill, the machine delivers faster penetration rates, lower tool consumption, and reduced operating costs.

4. Multi-Purpose Application

The versatile boom can perform face drilling, cross-cut excavation, and rock bolting, maximizing equipment utilization.

5. Excellent Mobility and Reliability

The four-wheel-drive articulated chassis provides superior maneuverability, stability, and safe operation in challenging underground environments.

6. Easy Maintenance and Operator Comfort

A spacious operating area, user-friendly controls, and easy-access maintenance points help improve productivity while minimizing downtime.

Q1:What types of underground projects is the KJ311 Hydraulic Jumbo suitable for?

The KJ311 Hydraulic Jumbo is designed for underground hard-rock excavation projects with tunnel sections ranging from 12m² to 35m². It is widely used in metal mines, gold mines, copper mines, lead-zinc mines, hydropower tunnels, railway tunnels, highway tunnels, and underground infrastructure projects.

Q2:What is the maximum drilling depth of the KJ311?

The KJ311 can drill holes up to 14 meters deep, making it suitable for mine development, tunnel excavation, long-hole drilling, and blasting operations that require deeper drilling capabilities.

Q3:What after-sales services do you provide for overseas customers?

We provide comprehensive after-sales support including online technical assistance, remote troubleshooting, spare parts supply, operation and maintenance training, equipment commissioning guidance, and on-site technical service when required.

Q4:What transportation methods are available for international shipment?

The KJ311 is generally shipped by sea using standard containers, open-top containers, or flat-rack containers depending on the machine dimensions and customer requirements. Multimodal transportation solutions can also be arranged.