📦 Underground Mining Drilling Rigs

Kaishan KJ311i Intelligent Tunnelling Drilling Rig

Name: Kaishan KJ311i Intelligent Tunnelling Drilling Rig
Brand: Kaishan
SKU: KJ311i
Availability: InStock

Model: KJ311i

Kaishan KJ311i Intelligent Tunnelling Drilling Rig (official model KJ311i). Source: Zhejiang Kaishan Heavy Industry product centre.

Best For

Underground Mining Development Tunnel Excavation Civil Construction Narrow Vein Mining

Technical Specifications

Model	Kaishan KJ311i
Drilling Depth	30 m
Hole Diameter	45-102 mm
Drilling Method	Hydraulic Top Hammer
Engine Power	74 kW
Weight	12,000 kg
Dimension (L×W×H)	8,000 × 1,400 × 2,600 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

The Kaishan KJ311i is a compact underground mining drilling rig engineered for efficient development and production drilling in narrow-vein and tunnel operations. Built on a robust articulated chassis, it delivers reliable hydraulic top-hammer performance with a drilling depth of up to 30 meters and hole diameters from 45 to 102 mm. Powered by a 74 kW diesel engine, the KJ311i combines powerful percussive force with precise feed control, ensuring fast penetration in hard rock. Its low-profile design, only 2.6 meters high and 1.4 meters wide, allows easy maneuverability in confined underground spaces. The rig features a heavy-duty boom, automatic rod handling, and an ergonomic operator station for improved safety and productivity. Ideal for underground mines, tunnels, and civil construction, the KJ311i reduces cycle times and operating costs. With Kaishan's global service network and proven reliability, this drilling rig is a smart choice for contractors seeking a versatile and durable underground drilling solution.

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

45-102 mm

Drilling Depth

30 m

Engine Power

74 kW

Weight

12,000 kg

Dimension (L×W×H)

8,000 × 1,400 × 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 low-profile design for narrow-vein and small tunnel operations

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Powerful hydraulic top hammer for fast penetration in hard rock

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Drilling depth up to 30 meters and hole diameter 45-102 mm

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74 kW diesel engine with reliable power and low fuel consumption

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Articulated chassis and four-wheel drive for excellent mobility

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Automatic rod handling system for improved safety and efficiency

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Ergonomic operator station with joystick controls and good visibility

Applications

📍 Underground Mining Development

Drilling blast holes and production holes in narrow-vein underground mines.

Solution: The KJ311i's compact size and powerful hammer enable efficient drilling in confined spaces, reducing cycle times and improving ore recovery.

📍 Tunnel Excavation

Face drilling and roof bolting in tunnels for mining and civil engineering.

Solution: With its heavy-duty boom and automatic rod handling, the rig ensures precise hole placement and fast advance rates in tunnel projects.

📍 Civil Construction

Drilling for foundations, anchoring, and grouting in urban construction.

Solution: The KJ311i's mobility and low emissions make it suitable for urban job sites, while its hydraulic system provides reliable performance.

📍 Narrow Vein Mining

Extraction drilling in narrow ore bodies where space is limited.

Solution: The rig's 1.4 m width and 2.6 m height allow access to narrow stopes, and its high drilling speed maximizes productivity.

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
KJ311iThis model	Kaishan KJ311i	30 m	45-102 mm	Hydraulic Top Hammer	74 kW	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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Main Components

Hydraulic rock drill (top hammer)
Heavy-duty boom and feed beam
Articulated chassis with four-wheel drive
Diesel engine (74 kW)
Hydraulic pumps and control valves
Automatic rod handling system
Operator cabin with joystick controls
Drill string and drill bits

Working Principle

The Kaishan KJ311i underground mining drilling rig operates on a hydraulic top hammer principle. A diesel engine drives hydraulic pumps that supply pressurized oil to the rock drill, boom, feed, and traction systems. The rock drill converts hydraulic energy into high-frequency percussive impacts and rotation, which are transmitted through the drill string to the drill bit. The bit crushes rock through impact and rotation, while flushing media (water or air) removes cuttings from the hole. The feed system maintains optimal thrust for efficient penetration, and the boom positions the drill accurately. The rig's articulated chassis and four-wheel drive allow maneuverability in underground tunnels. Automatic rod handling reduces manual intervention, improving safety and consistency. The operator controls all functions from an ergonomic cabin, ensuring precise and efficient drilling.

Detailed Features

▸Compact design for narrow underground spaces
▸High drilling speed in hard rock
▸Reliable 74 kW diesel engine
▸Automatic rod handling for safety
▸Ergonomic operator cabin
▸Four-wheel drive for rough terrain
▸Heavy-duty boom with large coverage
▸Easy maintenance and service access

Packaging & Shipping

The Kaishan KJ311i is shipped in a disassembled state for efficient container loading. It is protected with rust-proof coating and wrapped in heavy-duty plastic. Main components are secured on steel skids. The rig can fit into a 40HQ container. Delivery time is 30-45 days after order confirmation. Port of shipment: Shanghai or Ningbo, China.

After-Sales Service

Kaishan offers a 12-month warranty on the KJ311i drilling rig. We provide 24-hour online technical support and global after-sales service. Free training for operators and maintenance staff is available at our factory or on-site. Spare parts are stocked in major regions for quick delivery. Our service team ensures minimal downtime and maximum productivity.

Frequently Asked Questions

What hole sizes and depth can the KJ311i drill?+

The KJ311i drills hole diameters from 45 to 102 mm to a drilling depth of 30 m. It uses hydraulic top hammer drilling for development and production work. This range covers narrow-vein and tunnel blasthole patterns.

What engine powers the KJ311i drilling rig?+

The KJ311i is powered by a 74 kW diesel engine. The rig weighs 12,000 kg and measures 8,000 x 1,400 x 2,600 mm. Four-wheel drive and an articulated chassis support mobility on rough terrain.

What equipment matches the KJ311i in underground work?+

The KJ311i is a hydraulic top hammer rig that drills 45-102 mm holes to 30 m, so it pairs with DTH-style development and production drilling duties in confined headings. Its 1,400 mm width and 2,600 mm height suit narrow drifts. Automatic rod handling supports the drilling cycle.

Where can the KJ311i be used?+

The KJ311i suits underground mining development, tunnel excavation, civil construction and narrow vein mining. Its 45-102 mm hole diameter and 30 m drilling depth fit development and production drilling. The low-profile 2,600 mm height aids maneuverability in confined spaces.

How is the KJ311i shipped?+

The KJ311i is shipped disassembled for efficient container loading and fits into a 40HQ container. Components are protected with rust-proof coating, wrapped in heavy-duty plastic and secured on steel skids. Delivery time is 30-45 days after order confirmation from Shanghai or Ningbo, China.

What warranty and support come with the KJ311i?+

Kaishan offers a 12-month warranty on the KJ311i drilling rig. We provide 24-hour online technical support and global after-sales service. Free operator and maintenance training is available at our factory or on-site, and spare parts are stocked in major regions.

What maintenance features does the KJ311i have?+

The KJ311i is built with easy maintenance and service access. It carries a 74 kW diesel engine and automatic rod handling for safety. Kaishan stocks spare parts in major regions for quick delivery.