📦 Underground Mining Drilling Rigs
Kaishan KQ21 Scaling Rig
Model: KQ21
Kaishan KQ21 Scaling Rig (official model KQ21). Source: Zhejiang Kaishan Heavy Industry product centre. ｜ 官方中文名：KQ21型撬毛台车
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Technical Specifications
| Model | KQ21 |
| Drilling Depth | 30 m |
| Hole Diameter | 64-102 mm |
| Drilling Method | Top Hammer |
| Engine Power | 55 kW |
| Weight | 8500 kg |
| Dimension (L×W×H) | 7500×1350×2000 mm |
Product Details
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
64-102 mm
Drilling Depth
30 m
Engine Power
55 kW
Weight
8500 kg
Dimension (L×W×H)
7500×1350×2000 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 engineerKey Advantages
Powerful 55 kW diesel engine for reliable performance in hard rock
Drilling depth up to 30 meters and hole diameter 64-102 mm
Compact design (7500×1350×2000 mm) for excellent maneuverability in tunnels
Top hammer drilling method for high efficiency in hard rock
Ergonomic operator station with intuitive controls for reduced fatigue
Durable construction and low maintenance for extended service life
Optional customization available for specific project needs
Applications
📍 Underground Mining Development
Drilling blast holes for tunnel development and ore body access in underground mines.
Solution: The KQ21's compact size and powerful engine allow efficient drilling in narrow drifts, speeding up development cycles.
📍 Tunneling and Cavern Excavation
Face drilling and blast hole drilling for tunnels, caverns, and underground storage facilities.
Solution: With precise boom positioning and reliable drilling, the KQ21 ensures accurate hole placement for smooth blasting and excavation.
📍 Production Drilling in Stopes
Drilling long holes for ore extraction in underground stopes.
Solution: The rig's ability to drill up to 30 meters deep makes it ideal for production drilling, optimizing ore recovery.
📍 Roof Bolting and Support
Drilling holes for roof bolts and rock support in underground mines.
Solution: The KQ21 can be equipped with bolting systems to efficiently install rock bolts, enhancing ground control and safety.
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 |
|---|---|---|---|---|---|---|---|
| KQ21This model | KQ21 | 30 m | 64-102 mm | Top Hammer | 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 |
Compare 2–3 models? Tick the boxes and send them together — we will quote each one for you.
Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.
Not sure which model fits your project? Send us your working pressure and air demand — our engineers will recommend the right one.
Main Components
- Diesel engine
- Hydraulic drifter
- Boom and feed beam
- Control panel
- Undercarriage (crawler or wheel-mounted)
- Drill string (rods and bit)
- Dust suppression system
- Safety canopy (ROPS/FOPS)
Working Principle
The Kaishan KQ21 underground mining drilling rig operates on a top hammer drilling principle. A hydraulic drifter mounted on a boom applies high-frequency impact energy to the drill string, while simultaneously rotating the drill steel. The impact energy travels through the drill rods to the drill bit, which penetrates the rock through a combination of percussion and rotation. The rig's feed system maintains optimal thrust to ensure efficient energy transfer. As drilling progresses, compressed air or water is used to flush cuttings out of the hole. The boom and feed beam allow precise positioning of the drill hole, and the operator controls all functions from an ergonomic panel. The diesel engine powers the hydraulic system, which drives the drifter, feed, boom movements, and tramming. This method is highly effective in hard rock and provides fast penetration rates with good hole accuracy.
Detailed Features
- ▸High-performance top hammer drilling system
- ▸Compact and maneuverable for underground environments
- ▸Powerful 55 kW diesel engine
- ▸Drilling depth up to 30 meters
- ▸Hole diameter range 64-102 mm
- ▸Ergonomic operator controls
- ▸Robust construction for harsh conditions
- ▸Optional customization for specific needs
Packaging & Shipping
The Kaishan KQ21 is shipped in a disassembled or partially assembled state for efficient transport. It is securely packed in a 40-foot container or flat rack, depending on configuration. All components are protected with anti-corrosion wrapping and secured with steel strapping. Delivery time is typically 30-45 days after order confirmation, depending on customization. Shipping ports include Shanghai, Qingdao, or as per customer request. Full documentation including operation manual, parts catalog, and CE certification (if applicable) is provided.
After-Sales Service
Kaishan offers comprehensive after-sales service for the KQ21, including a 12-month warranty on major components (excluding wear parts). A 24-hour technical support hotline is available for troubleshooting. We provide on-site installation and commissioning services, as well as operator training. Spare parts are available through our global distribution network, ensuring quick delivery. Regular maintenance kits and service contracts are also offered to maximize uptime.
Frequently Asked Questions
What hole diameter and drilling depth does the KQ21 cover?+
The KQ21 drills holes from 64 to 102 mm in diameter to a depth of 30 m. It uses the top hammer drilling method for hard rock. This range covers blast hole drilling in tunnels and stopes.
What engine powers the KQ21?+
The KQ21 is powered by a 55 kW diesel engine. The rig weighs 8500 kg. Its dimensions are 7500×1350×2000 mm.
What are the dimensions and weight of the KQ21?+
The KQ21 measures 7500×1350×2000 mm and weighs 8500 kg. The compact design supports maneuverability in tunnels. It is built for underground mining environments.
Where can the KQ21 be used?+
The KQ21 is used for underground mining development, tunneling and cavern excavation, production drilling in stopes, and roof bolting and support. Its 30 m drilling depth and 64-102 mm hole diameter suit hard rock blast hole drilling. The compact 7500×1350×2000 mm frame allows work in confined tunnels and stopes.
How is the KQ21 shipped?+
The KQ21 is shipped disassembled or partially assembled in a 40-foot container or flat rack, depending on configuration. Components are protected with anti-corrosion wrapping and secured with steel strapping. Delivery time is typically 30-45 days after order confirmation, depending on customization.
What after-sales service is available for the KQ21?+
Kaishan offers a 12-month warranty on major components for the KQ21, excluding wear parts. A 24-hour technical support hotline is available for troubleshooting. On-site installation, commissioning, operator training and spare parts through the global distribution network are also provided.
What drilling method does the KQ21 use?+
The KQ21 uses the top hammer drilling method. It reaches a drilling depth of 30 m with hole diameters from 64 to 102 mm. The 55 kW diesel engine supports hard rock drilling.
Related Insights
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Where This Machine Is Used
Is This Rig Right for My Project?
Answer seven questions about your hole, depth and rock — get a matched rig, compressor, hammer, bit and rod.
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Recommended System
Rig + air compressor + drilling tools matched to your project. Get pre-matching advice from our engineers.
Recommended Equipment Configuration
Matched from real machine parameters — rig, compressor, hammer, bit and rod working as one system.
KQ21
Why matched
Parameter-matched to the machine on this page.
K10
- Hole range
- 254–311
- Air flow
- 22–65 m³/min
- Working pressure
- 10+ bar
- Bit shank
- K10**
Why matched
Hole range 254–311 mm covers your requirement ?–? mm.
K10
- Hole range
- 275–350
- Pressure class
- 高风压 (High pressure)
Why matched
Hole range 275–350 mm covers your requirement ?–? mm.
System requirement: 10 bar / 65 m³/min · ?–? mm
