📦 Underground Mining Drilling Rigs

Kaishan KSJ21 Hydraulic Mining Drilling Rig

Name: Kaishan KSJ21 Hydraulic Mining Drilling Rig
Brand: Kaishan
SKU: KSJ21
Availability: InStock

Model: KSJ21

Kaishan KSJ21 Hydraulic Mining Drilling Rig (official model KSJ21). Source: Zhejiang Kaishan Heavy Industry product centre. ｜官方中文名：KSJ21型矿用液压采矿钻车

Best For

Underground Metal Mining Tunneling and Underground Construction Underground Water Well Drilling Coal Mine (Non-Gassy) Development

Technical Specifications

Model	Kaishan KSJ21
Drilling Depth	150 m
Hole Diameter	45–89 mm
Drilling Method	Hydraulic top hammer drilling
Engine Power	55 kW
Weight	7,500 kg
Dimension (L×W×H)	6,500 × 1,800 × 2,200 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

The Kaishan KSJ21 is a compact underground mining drilling rig engineered for narrow-vein development and production drilling in hard rock mines. Designed for high maneuverability in confined tunnels, it delivers reliable drilling performance with a maximum depth of 150 m and hole diameters from 45 mm to 89 mm. Powered by a 55 kW diesel engine, the KSJ21 combines a robust boom and feed system with an efficient rock drill to achieve fast penetration rates in granite, limestone, and other hard formations. Its articulated chassis and four-wheel drive ensure stable tramming on rough underground roads, while ergonomic controls simplify operation and reduce operator fatigue. The rig is ideal for mining contractors, tunneling projects, and underground water well drilling where space is limited. With proven Kaishan hydraulic technology, the KSJ21 offers low maintenance, high availability, and excellent cost per meter drilled. It is a practical, durable solution for underground drilling professionals seeking productivity and safety in demanding environments.

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

45–89 mm

Drilling Depth

150 m

Engine Power

55 kW

Weight

7,500 kg

Dimension (L×W×H)

6,500 × 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

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Compact articulated chassis for narrow underground tunnels

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Powerful hydraulic rock drill for fast penetration in hard rock

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Maximum drilling depth of 150 m with hole diameters 45–89 mm

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55 kW diesel engine with four-wheel drive for reliable tramming

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Ergonomic operator station with ROPS/FOPS canopy and safety controls

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Advanced hydraulic system with efficient cooling and filtration

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Easy maintenance access and long service intervals

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Proven Kaishan reliability and global spare parts support

Applications

📍 Underground Metal Mining

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

Solution: The KSJ21's compact size and powerful rock drill enable efficient drilling in confined stopes, improving ore recovery and reducing dilution.

📍 Tunneling and Underground Construction

Drilling blast holes and anchor holes for tunnels, caverns, and underground chambers.

Solution: With its articulated chassis and 360° boom, the KSJ21 easily positions holes on the face, speeding up cycle times and ensuring accurate profile control.

📍 Underground Water Well Drilling

Drilling water wells in underground mines or from underground stations.

Solution: The KSJ21 can drill 45–89 mm holes to 150 m depth, providing a reliable solution for dewatering and water supply in underground operations.

📍 Coal Mine (Non-Gassy) Development

Drilling blast holes and support holes in non-gassy coal mines.

Solution: The rig's safety features and robust design ensure productive drilling in coal mine roadways, with low emissions and high reliability.

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
KSJ21This model	Kaishan KSJ21	150 m	45–89 mm	Hydraulic top hammer drilling	55 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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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
Boom and feed beam
Articulated chassis with four-wheel drive
Diesel engine (55 kW)
Hydraulic pumps and control valves
Operator station with ROPS/FOPS canopy
Drill string (rods, shank adapter, bits)
Water/air flushing system

Working Principle

The Kaishan KSJ21 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, boom, feed, and tramming circuits. The rock drill converts hydraulic energy into impact energy, rotation, and feed force. The piston strikes the shank adapter, transmitting stress waves through the drill string to the bit, which crushes the rock. Simultaneously, the drill string rotates, and flushing water or air removes cuttings from the hole. The boom and feed system allow precise positioning of the drill string at the desired angle and location. The operator controls all functions from an ergonomic panel, with safety interlocks and anti-jamming features. The articulated chassis and four-wheel drive enable maneuverability in tight tunnels. This efficient hydraulic system ensures high penetration rates, reduced bit wear, and reliable performance in hard rock conditions.

Detailed Features

▸Compact design for narrow vein mining and small tunnels
▸High-frequency hydraulic rock drill for fast drilling
▸Maximum depth 150 m, hole diameter 45–89 mm
▸55 kW diesel engine with reliable power
▸Four-wheel drive and articulated steering for maneuverability
▸Ergonomic controls and safety features (ROPS/FOPS, emergency stop)
▸Efficient hydraulic cooling and filtration for extended component life
▸Easy maintenance access and global spare parts availability

Packaging & Shipping

The Kaishan KSJ21 is shipped in a disassembled or partially assembled state for efficient transport. It is securely packed in seaworthy containers with rust-proof coating and protective wrapping. Standard shipping is via 40HQ container, with loading and lashing according to international standards. Delivery time is typically 30–45 days after order confirmation, depending on destination. Port of departure: Shanghai or Qingdao, China. We provide all necessary export documentation and can arrange door-to-door delivery upon request.

After-Sales Service

Kaishan offers comprehensive after-sales service for the KSJ21. The rig comes with a 12-month warranty or 2000 working hours (whichever comes first) for major components. We provide 24-hour online technical support and can dispatch engineers for on-site installation, commissioning, and training. Operator and maintenance training is available at our factory or at the customer's site. A global network of spare parts warehouses ensures quick availability of consumables and critical components. We also offer preventive maintenance programs and remote diagnostics to maximize uptime and reduce total cost of ownership.

Frequently Asked Questions

What hole diameter and depth can the Kaishan KSJ21 drill?+

The Kaishan KSJ21 drills hole diameters from 45 mm to 89 mm to a maximum drilling depth of 150 m. It uses hydraulic top hammer drilling for hard rock formations. This range covers narrow-vein development and production drilling.

What engine powers the KSJ21 underground drilling rig?+

The KSJ21 is powered by a 55 kW diesel engine. The rig weighs 7,500 kg and measures 6,500 × 1,800 × 2,200 mm. Four-wheel drive and articulated steering support tramming on rough underground roads.

What drilling method does the KSJ21 use?+

The Kaishan KSJ21 uses hydraulic top hammer drilling with a high-frequency hydraulic rock drill. It reaches a maximum drilling depth of 150 m with hole diameters of 45–89 mm. The hydraulic system includes efficient cooling and filtration.

Where can the KSJ21 underground mining drilling rig be used?+

The KSJ21 suits underground metal mining, tunneling and underground construction, underground water well drilling, and coal mine (non-gassy) development. Its compact articulated chassis is built for narrow underground tunnels. Hole diameters of 45–89 mm and a 150 m maximum depth cover these applications.

How is the Kaishan KSJ21 shipped?+

The KSJ21 is shipped disassembled or partially assembled in seaworthy containers with rust-proof coating and protective wrapping. Standard shipping is via 40HQ container with loading and lashing to international standards. Delivery time is typically 30–45 days after order confirmation, depending on destination.

What warranty and support come with the KSJ21?+

The Kaishan KSJ21 carries a 12-month warranty or 2000 working hours, whichever comes first, for major components. Kaishan provides 24-hour online technical support and can dispatch engineers for on-site installation, commissioning, and training. Operator and maintenance training is available at the factory or at the customer's site.

What safety and operator features does the KSJ21 have?+

The KSJ21 has an ergonomic operator station with a ROPS/FOPS canopy, safety controls, and an emergency stop. Ergonomic controls simplify operation and reduce operator fatigue. The 55 kW diesel engine and four-wheel drive support reliable tramming.

What maintenance features does the KSJ21 offer?+

The KSJ21 has easy maintenance access and long service intervals. Its advanced hydraulic system uses efficient cooling and filtration for extended component life. A global network of Kaishan spare parts support is available.