📦 Underground Mining Drilling Rigs

Kaishan KJ212i Intelligent Tunnelling Drilling Rig

Name: Kaishan KJ212i Intelligent Tunnelling Drilling Rig
Brand: Kaishan
SKU: KJ212i
Availability: InStock

Model: KJ212i

Kaishan KJ212i Intelligent Tunnelling Drilling Rig (official model KJ212i). Source: Zhejiang Kaishan Heavy Industry product centre.

Best For

Underground Metal Mines Coal Mine Roadways Hydropower Tunnels Civil Underground Works

Technical Specifications

Model	KJ212i
Drilling Depth	30 m
Hole Diameter	33–76 mm
Drilling Method	Hydraulic top hammer drilling
Engine Power	45 kW diesel (optional electric)
Weight	8,500 kg
Dimension (L×W×H)	7,200 × 2,100 × 2,600 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

The Kaishan KJ212i is a compact underground mining drilling rig engineered for efficient face drilling and rock bolting in narrow-vein and tunnel development. Built on a robust articulated chassis with a high-frequency hydraulic rock drill, it delivers reliable drilling performance in confined spaces. The KJ212i supports hole diameters from 33 mm to 76 mm and achieves drilling depths up to 30 m per hole with a 45 kW diesel engine and optional electric power pack. Its low-profile design, 2.1 m width, and 4.5 m turning radius allow smooth maneuverability in small headings. Advanced hydraulic controls, ergonomic operator station, and proven Kaishan components ensure high availability and low cost per meter. Ideal for underground metal mines, coal mines, hydropower tunnels, and civil underground works, the KJ212i combines productivity, safety, and serviceability in one rugged package.

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

33–76 mm

Drilling Depth

30 m

Engine Power

45 kW diesel (optional electric)

Weight

8,500 kg

Dimension (L×W×H)

7,200 × 2,100 × 2,600 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

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Compact 2.1 m width for narrow-vein and small-section tunnels

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High-frequency hydraulic rock drill for fast penetration

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

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45 kW diesel engine with optional electric power pack

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Articulated chassis with 4.5 m turning radius for maneuverability

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Ergonomic operator station with joystick controls and FOPS/ROPS canopy

Applications

📍 Underground Metal Mines

Face drilling and roof bolting in narrow-vein metal mines.

Solution: The KJ212i's compact size and powerful hydraulic drifter enable efficient drilling in small headings, improving productivity and safety.

📍 Coal Mine Roadways

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

Solution: With its low profile and electric power option, the rig reduces ventilation load and ensures stable drilling in coal seams.

📍 Hydropower Tunnels

Excavation drilling and grouting holes in hydropower tunnel projects.

Solution: The KJ212i delivers accurate hole positioning and high drilling speed, meeting tight project schedules.

📍 Civil Underground Works

Drilling for metro, storage, and utility tunnels.

Solution: Its articulated chassis and 4.5 m turning radius allow easy navigation in confined urban underground spaces.

Similar Models in This Category

This model is unique in its series — here are similar models from the same category.

Model	Model	Drilling Depth	Hole Diameter	Drilling Method	Engine Power	Inquire
KJ212iThis model	KJ212i	30 m	33–76 mm	Hydraulic top hammer drilling	45 kW diesel (optional electric)	Get a Quote
KQLG-115	KQLG-115	25 m	90–152 mm	DTH and Rotary	78 kW	Get a Quote
KAISHAN KJ310	Kaishan KJ310	—	32-76 mm	Rotary / DTH	45 kW	Get a Quote
KAISHAN KJ311	Kaishan KJ311	—	32-76mm	Hydraulic percussion + rotation	93 kW	Get a Quote
KAISHAN KJ311D	Kaishan KJ311	—	32–89 mm	Top Hammer / DTH	45 kW	Get a Quote
KJ422	Kaishan KJ422	—	76-152 mm	DTH / Rotary	—	Get a Quote
KJ421	Kaishan KJ421	—	—	Hydraulic percussion	93 kW	Get a Quote
KM211	Kaishan KM211	—	—	Top Hammer / DTH	60 kW	Get a Quote
KM311	Kaishan KM311	—	—	DTH / Rotary	60 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

Hydraulic rock drill (drifter)
Articulated chassis with four-wheel drive
Boom and feed beam
Diesel engine (45 kW)
Hydraulic pumps and valves
Operator station with joystick controls
FOPS/ROPS canopy
Drill string and bits

Working Principle

The Kaishan KJ212i underground mining drilling rig operates on a hydraulic drilling principle. A diesel engine drives the hydraulic pumps, which supply pressurized oil to the hydraulic rock drill (drifter). The drifter converts hydraulic energy into high-frequency impact energy, rotation, and feed force. The impact piston strikes the shank adapter, transmitting stress waves to the drill string and bit, which fractures the rock. Simultaneously, the rotation motor turns the drill string, and the feed system maintains optimal thrust. Flushing water or air removes cuttings from the hole. The boom and feed beam allow precise positioning of the drill hole. For tramming, the diesel engine powers the articulated chassis and four-wheel drive. When drilling, an optional electric power pack can be connected to reduce emissions and noise. The operator controls all functions via joysticks from an ergonomic, FOPS/ROPS-certified cabin.

Detailed Features

▸Compact design for narrow headings
▸High-frequency hydraulic rock drill
▸Drilling depth up to 30 m
▸Hole diameter 33–76 mm
▸45 kW diesel engine with electric option
▸Articulated chassis, 4.5 m turning radius
▸Ergonomic joystick controls
▸FOPS/ROPS certified canopy

Packaging & Shipping

The Kaishan KJ212i is shipped in a 40HQ container with the boom and feed beam partially disassembled for transport. It is securely fastened with steel chains and protected with anti-rust coating and waterproof wrapping. Delivery time is 30–45 days after order confirmation. Port of shipment: Shanghai or Ningbo, China. Custom packaging and labeling are available upon request.

After-Sales Service

Kaishan provides a 12-month warranty on the KJ212i drilling rig (excluding wear parts). 24-hour online technical support is available. On-site installation, commissioning, and operator training can be arranged. A global spare parts network ensures fast delivery of components. Regular maintenance reminders and service kits are offered to maximize uptime.

Frequently Asked Questions

What hole diameter and drilling depth can the KJ212i achieve?+

The KJ212i drills hole diameters from 33 mm to 76 mm and reaches a drilling depth of 30 m per hole. It uses hydraulic top hammer drilling. This range covers face drilling and rock bolting in narrow-vein and tunnel development.

What engine powers the KJ212i underground mining drilling rig?+

The KJ212i runs on a 45 kW diesel engine, with an optional electric power pack available. The rig weighs 8,500 kg. Its dimensions are 7,200 × 2,100 × 2,600 mm.

What are the dimensions and turning radius of the KJ212i?+

The KJ212i measures 7,200 × 2,100 × 2,600 mm and has a 4.5 m turning radius. Its 2.1 m width allows maneuverability in narrow headings. The articulated chassis supports movement in small underground sections.

Where can the KJ212i drilling rig be used?+

The KJ212i is used in underground metal mines, coal mine roadways, hydropower tunnels and civil underground works. Its compact 2.1 m width suits narrow-vein and small-section tunnels. The rig is built for face drilling and rock bolting.

What controls and canopy does the KJ212i operator station have?+

The KJ212i has an ergonomic operator station with joystick controls and a FOPS/ROPS certified canopy. The high-frequency hydraulic rock drill supports fast penetration. Hydraulic controls are part of the rig design.

How is the KJ212i shipped and what is the delivery time?+

The KJ212i is shipped in a 40HQ container with the boom and feed beam partially disassembled. It is fastened with steel chains and protected with anti-rust coating and waterproof wrapping. Delivery time is 30–45 days after order confirmation, from Shanghai or Ningbo, China.

What warranty and after-sales support come with the KJ212i?+

Kaishan provides a 12-month warranty on the KJ212i drilling rig, excluding wear parts. 24-hour online technical support is available. On-site installation, commissioning and operator training can be arranged, and a global spare parts network supports component delivery.

What is the difference between the KJ212i and other Kaishan rigs?+

The KJ212i is a compact underground mining drilling rig with a 2.1 m width, 30 m drilling depth and 33–76 mm hole diameter. It uses a 45 kW diesel engine with an optional electric power pack. These figures define its role in narrow-vein and tunnel development.