📦 Underground Mining Drilling Rigs

Kaishan KJ311 Underground Drilling Rig

Name: Kaishan KJ311 Underground Drilling Rig
Brand: Kaishan
SKU: KAISHAN KJ311
Availability: InStock

Model: KAISHAN KJ311

The Kaishan KJ311 is a compact underground drill rig engineered for efficient face drilling, roof bolting, and small-scale tunneling in mining and construction. Built for narrow-vein operations, it delivers reliable hydraulic drilling performance with a robust boom and proven Kaishan rock drill. Its low-profile design and agile tramming system allow fast repositioning in confined drifts, while the powerful diesel engine and hydraulic system ensure stable penetration in hard rock. The KJ311 supports hole diameters from 33 mm to 76 mm and drilling depths up to 30 meters, making it ideal for underground development, mine support, and infrastructure projects. With easy maintenance access, durable components, and global Kaishan service support, the KJ311 reduces downtime and improves productivity in demanding underground environments.

Best For

Underground Metal Mining Coal Mine Roadway Development Civil Tunneling Shaft and Ramp Drilling

Technical Specifications

Model	Kaishan KJ311
Impact Pressure	130BAR
Hole Diameter	32-76mm
Drilling Method	Hydraulic percussion + rotation
Engine Power	93 kW
Weight	12000 kg
Dimension (L×W×H)	11300 × 1,750 × 2,000 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan KJ311 is a dedicated underground drill rig designed for face drilling, roof bolting, and auxiliary operations in mining and tunneling. As part of Kaishan's underground drill rig series, it combines a compact chassis with a high-performance hydraulic boom and rock drill to deliver reliable drilling in confined spaces. The KJ311 is particularly suited to narrow-vein mining and small-section drifts where maneuverability and stability are critical. ## Technical Features The KJ311 features a robust articulated boom with a large coverage area, allowing precise positioning of the rock drill for both horizontal and inclined holes. The hydraulic system provides smooth control of feed, rotation, and percussion, optimizing penetration rates in hard rock. A powerful diesel engine supplies reliable power for tramming and drilling, while the four-wheel drive and low-profile design ensure excellent mobility on rough underground roads. The rig is equipped with a durable feed beam and centralizer to maintain hole accuracy and reduce drill steel wear. Operator comfort and safety are enhanced by an ergonomic control panel, good visibility, and optional canopy. ## Applications The KJ311 is widely used in underground metal mines, coal mines, and civil tunneling projects. It excels in face drilling for development headings, roof bolting for ground support, and drilling of blast holes in narrow veins. Its compact size also makes it suitable for drilling in shafts, ramps, and other confined areas. With appropriate drill tools, it can handle hole diameters from 33 mm to 76 mm and depths up to 30 meters, covering most underground drilling needs. ## 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 for durability and low maintenance, and it is backed by Kaishan's worldwide service network. Whether you are developing a new mine or expanding an existing operation, the KJ311 offers a cost-effective solution for underground drilling.

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

32-76mm

Impact Pressure

130BAR

Engine Power

93 kW

Weight

12000 kg

Dimension (L×W×H)

11300 × 1,750 × 2,000 mm

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

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Key Advantages

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Compact low-profile design for narrow vein and small section drifts

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Powerful hydraulic rock drill for efficient hard rock penetration

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Articulated boom with large coverage for precise hole positioning

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Four-wheel drive and oscillating axle for excellent tramming on rough roads

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Ergonomic control panel with clear visibility for safe operation

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Durable feed beam and centralizer for accurate drilling and reduced steel wear

Applications

📍 Underground Metal Mining

Face drilling and roof bolting in narrow vein metal mines.

Solution: KJ311's compact size and powerful boom enable efficient drilling in tight stopes and development headings, improving ore recovery.

📍 Coal Mine Roadway Development

Drilling blast holes and roof bolt holes in coal mine roadways.

Solution: With approved components and optional safety features, KJ311 supports fast roadway advance and stable roof control.

📍 Civil Tunneling

Drilling for tunnel excavation and support in infrastructure projects.

Solution: The KJ311's high penetration rate and accurate positioning speed up tunnel cycles and reduce overbreak.

📍 Shaft and Ramp Drilling

Drilling in shafts, ramps, and other confined underground spaces.

Solution: Low profile and agile tramming allow the KJ311 to operate in restricted areas where larger rigs cannot access.

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 KJ311This model	Kaishan KJ311	130BAR	32-76mm	Hydraulic percussion + rotation	93 kW	Get a Quote
KAISHAN KJ310	Kaishan KJ310	130bar	32-76 mm	Rotary / DTH	45 kW	Get a Quote
KAISHAN KJ311D	Kaishan KJ311	130bar	32–89 mm	Top Hammer / DTH	45 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

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

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Main Components

Diesel engine
Hydraulic pumps
Rock drill
Articulated boom
Feed beam
Control panel
Undercarriage with four-wheel drive
Drill string and bit

Working Principle

The Kaishan KJ311 underground drill rig operates on a hydraulic percussion principle. A diesel engine drives the hydraulic pumps, which supply pressurized oil to the rock drill, boom, and feed system. The rock drill converts hydraulic energy into impact energy, rotation, and feed force. The piston strikes the shank adapter, transmitting shock waves to the drill string and bit, which fractures the rock. Simultaneously, the drill string rotates to index the bit, and flushing water or air removes cuttings from the hole. The articulated boom positions the feed beam accurately, while the operator controls all functions from a central panel. The tramming system, powered by the same hydraulic circuit, enables the rig to move between drilling locations. This integrated hydraulic system ensures efficient energy transfer, precise control, and reliable performance in demanding underground conditions.

Detailed Features

▸Compact and low-profile for confined underground spaces
▸Powerful hydraulic rock drill for high penetration rates
▸Articulated boom with wide coverage
▸Four-wheel drive for superior mobility
▸Ergonomic controls for operator comfort
▸Durable components for long service life
▸Easy maintenance access to reduce downtime
▸Optional safety and environmental features

Packaging & Shipping

The Kaishan KJ311 is shipped in a disassembled or partially assembled state to fit standard containers. Main components are securely packed with steel frames and anti-rust protection. Typically, one 40HQ container can hold one unit. Delivery time is 30-45 days after order confirmation. Port of shipment: Shanghai or Ningbo, China. Custom packaging and shipping arrangements are available upon request.

After-Sales Service

Kaishan provides comprehensive after-sales service for the KJ311. All rigs come with a 12-month warranty or 2000 working hours, whichever comes first. Our global service network offers 24-hour technical support, on-site installation and commissioning, operator training, and genuine spare parts supply. Regular maintenance kits and troubleshooting guides are available to ensure maximum uptime. Contact our local dealer or Kaishan service center for assistance.

Frequently Asked Questions

What hole diameter and drilling capability does the Kaishan KJ311 offer?+

The Kaishan KJ311 drills hole diameters from 32-76mm using hydraulic percussion and rotation. It is built for face drilling, roof bolting and small-scale tunneling in narrow-vein operations.

What engine power does the Kaishan KJ311 use?+

The Kaishan KJ311 is powered by a 93 kW engine. This diesel engine supplies power for tramming and drilling in underground conditions.

What impact pressure does the Kaishan KJ311 require?+

The Kaishan KJ311 operates at an impact pressure of 130BAR. Its hydraulic system controls feed, rotation and percussion for penetration in hard rock.

Where can the Kaishan KJ311 be used?+

The Kaishan KJ311 suits underground metal mining, coal mine roadway development, civil tunneling, and shaft and ramp drilling. Its compact low-profile design fits narrow-vein and small-section drifts.

How does the Kaishan KJ311 move on rough underground roads?+

The Kaishan KJ311 uses four-wheel drive and an oscillating axle for tramming on rough roads. Its low-profile chassis and agile tramming system allow fast repositioning in confined drifts.

What are the dimensions and weight of the Kaishan KJ311?+

The Kaishan KJ311 measures 11300 × 1,750 × 2,000 mm and weighs 12000 kg. The compact low-profile design supports operation in confined underground spaces.

How is the Kaishan KJ311 packaged and shipped?+

The Kaishan KJ311 ships disassembled or partially assembled to fit standard containers, with one 40HQ container holding one unit. Delivery takes 30-45 days after order confirmation from Shanghai or Ningbo, China.

What warranty and after-sales support come with the Kaishan KJ311?+

The Kaishan KJ311 includes a 12-month warranty or 2000 working hours, whichever comes first. Kaishan's global service network provides 24-hour technical support, on-site installation and commissioning, operator training, and genuine spare parts.