📦 Underground Mining Drilling Rigs

Kaishan KQ311 Underground Drilling Rig

Name: Kaishan KQ311 Underground Drilling Rig
Brand: Kaishan
SKU: KQ311
Availability: InStock

Model: KQ311

The Kaishan KQ311 is a compact underground drilling rig engineered for reliable hard-rock drilling in mining and tunneling operations. As a dedicated underground drill rig, it delivers efficient DTH and rotary drilling performance with a maximum depth of 120 m and hole diameters from 76 to 152 mm. Powered by a 78 kW diesel engine, the KQ311 combines a robust tracked undercarriage with a folding boom for stable positioning in confined spaces. Its hydraulic feed and rotation system ensures consistent penetration rates, while the integrated dust suppression system supports a safer working environment. Weighing approximately 9,800 kg and measuring 6,200 × 2,100 × 2,600 mm, the rig is easy to transport and maneuver in narrow drifts. Ideal for underground mining, tunnel support, water hole drilling, and grouting projects, the KQ311 offers a cost-effective solution for contractors seeking dependable performance and low maintenance. Backed by Kaishan's global service network, it is ready for demanding underground conditions.

Best For

Underground Mining Production Drilling Tunnel Excavation and Support Underground Water Well Drilling Grouting and Drainage Projects

Technical Specifications

Model	Kaishan KQ311
Impact Pressure	90-125bar
Engine	Cummins qsb39-c80-31
Drilling Method	DTH Hammer / Rotary
Engine Power	60 kW
Weight	12000 kg
Dimension (L×W×H)	8800 × 1750 × 2,650 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan KQ311 is a purpose-built underground drilling rig designed for hard-rock drilling in mining, tunneling, and underground construction. As part of Kaishan's KQ series, it combines proven hydraulic technology with a compact, tracked chassis to deliver stable and efficient drilling in confined spaces. The rig supports both down-the-hole (DTH) hammer and rotary drilling methods, making it adaptable to varied ground conditions and project requirements. ## Technical Features The KQ311 is equipped with a powerful 78 kW diesel engine that provides ample power for drilling and tramming. Its hydraulic feed system delivers smooth, adjustable thrust, while the rotation unit ensures optimal torque for different bit sizes. The folding boom allows precise positioning of the drill head, reducing setup time and improving hole accuracy. A maximum drilling depth of 120 m and hole diameter range of 76–152 mm cover typical underground production and support holes. The tracked undercarriage offers excellent mobility on rough terrain, and the rig's compact dimensions (6,200 × 2,100 × 2,600 mm) enable navigation through narrow drifts. An integrated dust suppression system minimizes airborne particles, contributing to a safer workplace. ## Applications The KQ311 is ideal for underground mining operations, including production drilling, roof bolting, and cable bolting. It is also well-suited for tunnel excavation, where it drills blast holes and probe holes with speed and precision. In underground water exploration, the rig can drill water holes up to 120 m deep. Additionally, it supports grouting and drainage projects, providing reliable performance in challenging environments. ## Why Choose the KQ311 With its robust construction, user-friendly controls, and low maintenance requirements, the KQ311 offers a cost-effective solution for contractors and mine operators. Kaishan's global service network ensures prompt support and spare parts availability, maximizing uptime and productivity. Whether you are developing a new tunnel or expanding an underground mine, the KQ311 delivers the reliability and efficiency you need.

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.

Impact Pressure

90-125bar

Engine Power

60 kW

Weight

12000 kg

Dimension (L×W×H)

8800 × 1750 × 2,650 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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Dedicated underground drill rig for hard-rock drilling

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Maximum drilling depth of 120 m with hole diameters 76–152 mm

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78 kW diesel engine for reliable power underground

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Compact tracked chassis for narrow drifts and rough terrain

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Folding boom for precise hole positioning and fast setup

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Hydraulic feed and rotation for consistent penetration

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Integrated dust suppression system for safer operation

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Low maintenance design with easy access to service points

Applications

📍 Underground Mining Production Drilling

Drilling blast holes and production holes in underground mines requires a rig that can operate in tight spaces and deliver consistent performance.

Solution: The KQ311's compact size and folding boom allow precise drilling in narrow stopes, while the 78 kW engine and hydraulic system ensure fast penetration in hard rock.

📍 Tunnel Excavation and Support

Tunneling projects need reliable drilling for blast holes, probe holes, and rock bolts.

Solution: With a drilling depth of 120 m and hole diameter up to 152 mm, the KQ311 handles both production and support drilling. Its dust suppression system improves visibility and safety.

📍 Underground Water Well Drilling

Locating and extracting groundwater in underground operations demands a rig capable of drilling water holes efficiently.

Solution: The KQ311 can drill water holes up to 120 m deep using DTH or rotary methods, providing a dependable solution for water supply in mines and tunnels.

📍 Grouting and Drainage Projects

Grouting and drainage holes are essential for ground stabilization and water control underground.

Solution: The rig's adjustable feed and rotation allow precise drilling of grout and drainage holes, while its tracked mobility enables quick repositioning between holes.

Similar Models in This Category

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

Model	Model	Impact Pressure	Engine	Drilling Method	Engine Power	Inquire
KQ311This model	Kaishan KQ311	90-125bar	Cummins qsb39-c80-31	DTH Hammer / Rotary	60 kW	Get a Quote
KAISHAN KJ310	Kaishan KJ310	130bar	—	Rotary / DTH	45 kW	Get a Quote
KAISHAN KJ311	Kaishan KJ311	130BAR	—	Hydraulic percussion + rotation	93 kW	Get a Quote
KAISHAN KJ311D	Kaishan KJ311	130bar	—	Top Hammer / DTH	45 kW	Get a Quote
KM211	Kaishan KM211	150bar	Cummins QSB3.9-C80-31	Top Hammer / DTH	60 kW	Get a Quote
KM311	Kaishan KM311	150bar	Cummins QSB39	DTH / Rotary	60 kW	Get a Quote
KQLG-115	KQLG-115	—	—	DTH and Rotary	78 kW	Get a Quote
KJ422	Kaishan KJ422	180-200bar	Cummins qsb5.9-c160	DTH / Rotary	—	Get a Quote
KJ421	Kaishan KJ421	180-200bar	Cummins QSB3.9-C125	Hydraulic percussion	93 kW	Get a Quote

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Main Components

Diesel engine
Hydraulic pump system
Rotation unit
Feed beam and chain
Folding boom
Tracked undercarriage
Control panel
Dust suppression system

Working Principle

The Kaishan KQ311 underground drilling rig operates on a hydraulic drilling principle. A diesel engine drives the hydraulic pumps, which supply pressurized oil to the rotation unit, feed system, and boom cylinders. The rotation unit turns the drill string, while the feed system applies controlled thrust to advance the bit into the rock. For DTH drilling, compressed air is delivered through the drill pipe to power the down-the-hole hammer, which strikes the rock with high-frequency impacts. The cuttings are flushed out of the hole by the exhaust air and water mixture. For rotary drilling, the bit is rotated and pushed into the formation, with cuttings removed by flushing media. The folding boom allows the operator to position the drill head accurately over the hole. The tracked undercarriage provides mobility and stability during drilling. All functions are controlled from a centralized control panel, ensuring safe and efficient operation in underground conditions.

Detailed Features

▸Compact design for narrow underground workings
▸Powerful 78 kW diesel engine
▸Maximum drilling depth 120 m
▸Hole diameter range 76–152 mm
▸DTH and rotary drilling capability
▸Folding boom for precise positioning
▸Tracked chassis for rough terrain
▸Integrated dust suppression

Packaging & Shipping

The Kaishan KQ311 is shipped in a disassembled state for efficient container loading. It is typically packed in a 40HQ container, with the main body, boom, and accessories securely fastened and protected. Shipping dimensions and weight are optimized for standard ocean freight. Delivery time is approximately 30–45 days after order confirmation, depending on destination. Ports of departure include Shanghai or Ningbo, China. Custom packaging and labeling are available upon request.

After-Sales Service

Kaishan offers a comprehensive after-sales service package for the KQ311. The rig comes with a 12-month warranty covering major components. A 24-hour technical support hotline is available for troubleshooting and operational guidance. We provide on-site installation and commissioning services, as well as operator training to ensure safe and efficient use. A global network of spare parts warehouses ensures quick availability of consumables and critical components. Regular maintenance reminders and service contracts are also offered to maximize equipment uptime and extend service life.

Frequently Asked Questions

What hole diameters and drilling depth can the Kaishan KQ311 handle?+

The Kaishan KQ311 drills hole diameters from 76 to 152 mm with a maximum drilling depth of 120 m. It supports both DTH hammer and rotary drilling methods. This range covers hard-rock drilling in mining and tunneling operations.

What engine powers the KQ311 underground drilling rig?+

The KQ311 is powered by a Cummins qsb39-c80-31 engine rated at 60 kW. This diesel engine provides power for drilling and tramming underground. The rig weighs 12000 kg.

What impact pressure does the KQ311 require?+

The Kaishan KQ311 operates at an impact pressure of 90-125bar. This pressure range supports DTH hammer drilling with hole diameters from 76 to 152 mm. The rig is designed for hard-rock drilling in underground mining and tunneling.

What are the dimensions of the KQ311 drilling rig?+

The KQ311 measures 8800 × 1750 × 2,650 mm (L×W×H). It weighs 12000 kg. These dimensions support positioning in underground workings.

What applications is the Kaishan KQ311 suitable for?+

The KQ311 is used for underground mining production drilling, tunnel excavation and support, underground water well drilling, and grouting and drainage projects. It drills hole diameters from 76 to 152 mm to a maximum depth of 120 m. The rig supports DTH hammer and rotary drilling methods.

How is the Kaishan KQ311 shipped?+

The KQ311 is shipped in a disassembled state for efficient container loading, typically packed in a 40HQ container. The main body, boom, and accessories are securely fastened and protected. Delivery time is approximately 30-45 days after order confirmation, depending on destination.

What after-sales support is available for the KQ311?+

The Kaishan KQ311 comes with a 12-month warranty covering major components. A 24-hour technical support hotline is available for troubleshooting and operational guidance. On-site installation and commissioning services and operator training are also provided.