📦 Underground Mining Drilling Rigs

Kaishan KJ311D Underground Drilling Rig

Name: Kaishan KJ311D Underground Drilling Rig
Brand: Kaishan
SKU: KAISHAN KJ311D
Availability: InStock

Model: KAISHAN KJ311D

The Kaishan KJ311 is a compact underground drilling rig engineered for efficient face drilling, roof bolting, and small-scale tunneling in mining and construction. Built for narrow-vein operations and low-profile headings, it combines a robust boom, reliable hydraulic system, and proven Kaishan rock drill technology to deliver stable performance in hard rock conditions. With a drilling depth of up to 30 m and hole diameter of 33–76 mm, the KJ311 supports both top hammer and DTH drilling methods. Its 45 kW diesel engine and 7,500 kg operating weight provide the right balance of power and maneuverability in confined underground spaces. The rig is easy to operate, simple to maintain, and backed by Kaishan’s global service network. Whether you are developing a mine gallery, drilling blast holes, or installing rock bolts, the KJ311 offers a cost-effective, reliable solution for underground drilling contractors.

Best For

Underground Mining Development Tunnel Excavation Rock Reinforcement Underground Utility Installation

Technical Specifications

Model	Kaishan KJ311
Impact Pressure	130bar
Hole Diameter	32–89 mm
Drilling Method	Top Hammer / DTH
Engine Power	45 kW
Weight	7,500 kg
Dimension (L×W×H)	6,000 × 1,800 × 2,200 mm

Get a Quote Check Fit

Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan KJ311 is a purpose-built underground drilling rig designed for narrow-vein mining, small-scale tunneling, and underground construction projects. As part of Kaishan’s proven KJ series, this rig delivers reliable drilling performance in confined spaces where larger equipment cannot operate. It is ideal for face drilling, roof bolting, and blast hole drilling in hard rock conditions. ## Technical Features The KJ311 is equipped with a robust hydraulic boom and a high-frequency rock drill that ensures fast penetration and reduced bit wear. Its compact chassis and articulated steering allow easy maneuverability in narrow drifts and crosscuts. The rig features a 45 kW diesel engine with a hydraulic transmission system, providing smooth power delivery and low emissions. The drilling system supports both top hammer and down-the-hole (DTH) methods, offering flexibility for different rock formations. With a maximum drilling depth of 30 meters and hole diameter range of 33–76 mm, the KJ311 handles a wide range of underground drilling tasks. The operator’s platform is ergonomically designed for safety and comfort, with intuitive controls and excellent visibility. ## Applications The KJ311 excels in underground mining development, where it drills blast holes and roof bolt holes with precision. It is also suitable for tunnel excavation, underground utility installation, and rock reinforcement projects. Its compact size makes it ideal for narrow-vein operations and small-scale mining where access is limited. Contractors appreciate its low operating cost and high reliability. ## Why Choose Kaishan KJ311 Kaishan is a global leader in drilling equipment, and the KJ311 reflects decades of engineering expertise. The rig is built with high-quality components, including a durable boom, heavy-duty undercarriage, and reliable hydraulic system. It is easy to maintain, with readily accessible service points and long service intervals. Backed by Kaishan’s worldwide support network, the KJ311 ensures maximum uptime and productivity. Whether you are drilling in a mine or a tunnel, the KJ311 delivers consistent performance and exceptional value.

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

32–89 mm

Impact Pressure

130bar

Engine Power

45 kW

Weight

7,500 kg

Dimension (L×W×H)

6,000 × 1,800 × 2,200 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 workings

✓

Powerful 45 kW diesel engine for reliable performance

✓

Drilling depth up to 30 m and hole diameter 33–76 mm

✓

Supports both top hammer and DTH drilling methods

✓

Ergonomic operator station with intuitive controls

✓

Robust hydraulic boom for precise positioning

Applications

📍 Underground Mining Development

Drilling blast holes and roof bolt holes in narrow-vein mines and small-scale underground operations.

Solution: The KJ311's compact size and powerful rock drill enable efficient face drilling and bolting in confined spaces, improving productivity and safety.

📍 Tunnel Excavation

Drilling blast holes for tunnel advance in civil engineering and mining tunnels.

Solution: With a drilling depth of 30 m and flexible drilling methods, the KJ311 accelerates tunnel cycles and reduces downtime.

📍 Rock Reinforcement

Installing rock bolts and anchors for ground support in underground excavations.

Solution: The rig's precise boom control and high-frequency rock drill ensure accurate bolt hole placement, enhancing stability.

📍 Underground Utility Installation

Drilling holes for pipes, cables, and ventilation in underground construction.

Solution: The KJ311's maneuverability and reliable hydraulic system allow quick setup and drilling in tight spaces.

KJ Series Models

Compare specifications across the series to find the right model.

Model	Model	Impact Pressure	Hole Diameter	Drilling Method	Engine Power	Inquire
KAISHAN KJ311DThis model	Kaishan KJ311	130bar	32–89 mm	Top Hammer / DTH	45 kW	Get a Quote
KAISHAN KJ310	Kaishan KJ310	130bar	32-76 mm	Rotary / DTH	45 kW	Get a Quote
KAISHAN KJ311	Kaishan KJ311	130BAR	32-76mm	Hydraulic percussion + rotation	93 kW	Get a Quote
KJ211	Kaishan KJ211	130bar	—	Hydraulic Top Hammer	45 kW	Get a Quote
KJ210	Kaishan KJ210	150bar	—	Hydraulic top hammer drilling	45 kW diesel (optional electric motor)	Get a Quote
KJ422	Kaishan KJ422	180-200bar	76-152 mm	DTH / Rotary	—	Get a Quote
KJ421	Kaishan KJ421	180-200bar	—	Hydraulic percussion	93 kW	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 system
Drilling boom
Rock drill (top hammer or DTH hammer)
Feed beam and carriage
Undercarriage with articulated steering
Operator's cabin/control panel
Drill string (rods and bits)

Working Principle

The Kaishan KJ311 underground drilling rig operates on a hydraulic top hammer or DTH drilling principle. A diesel engine drives the hydraulic system, which powers the boom, feed, and rock drill. The rock drill delivers high-frequency impact energy to the drill string, while rotation and feed force are applied to penetrate rock. For DTH drilling, compressed air is supplied to the down-the-hole hammer, which strikes the bit directly. The rig's articulated chassis and hydraulic steering enable precise positioning in underground workings. The operator controls all functions from an ergonomic panel, ensuring efficient and safe drilling.

Detailed Features

▸Compact and maneuverable for narrow veins
▸High-performance hydraulic rock drill
▸Reliable 45 kW diesel engine
▸Drilling depth up to 30 m
▸Hole diameter range 33–76 mm
▸Supports top hammer and DTH methods
▸Ergonomic operator station
▸Easy maintenance and service access

Packaging & Shipping

The Kaishan KJ311 is shipped in a standard export packing, suitable for container or flat rack transport. It is protected with anti-rust coating and securely fastened. Delivery time is typically 30–45 days after order confirmation. Port of shipment: Shanghai or Ningbo, China.

After-Sales Service

Kaishan offers a 12-month warranty on the KJ311. We provide 24-hour online technical support, on-site training, and global spare parts supply. Our service team ensures quick response and minimal downtime.

Frequently Asked Questions

What hole diameter and drilling depth can the Kaishan KJ311D achieve?+

The Kaishan KJ311D drills hole diameters from 32–89 mm with a drilling depth of up to 30 m. It supports both top hammer and DTH drilling methods. This range covers face drilling, blast hole drilling and roof bolting in hard rock.

What engine powers the Kaishan KJ311D?+

The Kaishan KJ311D uses a 45 kW diesel engine with a hydraulic transmission system. The rig has an operating weight of 7,500 kg. Its dimensions are 6,000 × 1,800 × 2,200 mm.

What impact pressure does the Kaishan KJ311D run at?+

The Kaishan KJ311D operates at an impact pressure of 130 bar. This pressure drives the hydraulic rock drill for penetration in hard rock conditions. The rig pairs this with a robust hydraulic boom for precise positioning.

Where can the Kaishan KJ311D be used?+

The Kaishan KJ311D is built for underground mining development, tunnel excavation, rock reinforcement and underground utility installation. Its compact chassis and articulated steering suit narrow-vein operations and low-profile headings. It handles face drilling, roof bolting and blast hole drilling.

How is the Kaishan KJ311D shipped and what is the delivery time?+

The Kaishan KJ311D is shipped in standard export packing suitable for container or flat rack transport, protected with anti-rust coating. Delivery time is typically 30–45 days after order confirmation. The port of shipment is Shanghai or Ningbo, China.

What warranty and after-sales support come with the Kaishan KJ311D?+

Kaishan offers a 12-month warranty on the KJ311D. Support includes 24-hour online technical support, on-site training and global spare parts supply. The service team aims for quick response and minimal downtime.

Is the Kaishan KJ311D easy to maintain?+

The Kaishan KJ311D is designed with easy maintenance and service access. It uses a reliable hydraulic system and proven Kaishan rock drill technology. The rig is described as simple to maintain for underground operations.