Kaishan drilling rigs

Underground Scaling Rigs (Rock Scalers)

Hydraulic scaling rigs — KQ Series for loose-rock removal to secure backs and walls after blasting.

Applications

Underground mining
Rock scaling
Ground support

Key features

✓Removes loose rock from backs and walls after blasting
✓Articulated breaker boom
✓Replaces manual bar-down work — safer and faster cycles

Quick Selection Guide

Use the published hole range, drive arrangement and duty notes to narrow the Underground Scaler Series range before opening a model page.

RequirementModels to reviewPublished selection basis

Loose rock removal after blasting

KQ21 / KQ311

Secure backs and walls before drilling resumes; match breaker size to ground conditions.

Not sure which model fits your project? Send your hole diameter, depth, site conditions and compressor requirement — we will confirm the match before quotation.

Full Specification Comparison

Compare all models below. Click any model name to view full specifications and inquiry details.

Kaishan underground scaling rigs (KQ21, KQ311) remove loose rock from backs and walls after blasting, securing the heading before drilling and loading resume. A dedicated scaler replaces manual bar-down work with an articulated breaker boom, improving both safety and cycle reliability in development and production areas. At publication, the series covers 2 models — key specifications are listed below.

Model	Machine	Weight (kg)
KQ21 →	KQ21 Hydraulic Scaling Rig	6500 kg
KQ311 →	KQ311 Hydraulic Scaling Rig	12000 kg

Complete specifications by model

KQ21 →

Dimensions & weight — Overall dimensions (L × W × H): 6000 × 1700 × 1840 mm
Dimensions & weight — Weight: 6500 kg
Dimensions & weight — Ground clearance: 230 mm
Diesel engine: YCF3675-T480
Power / speed: 55.8 kW / 2200 rpm
Drive system: Hydrostatic drive
Tires: 300-15
Maximum tramming speed: 7 km/h
Maximum climbing angle: 25% (14°)
Travelling braking: Wet brake
Swing angle: ±6°
Steering angle: ±40°
Turning radius (inner / outer): 2100 / 3800 mm
Impact energy: 350 J
Impact frequency: 9-16 Hz
Working pressure: 90-125 bar
Drive flow: 25-40 L/min
Maximum working height: 6200 mm
Maximum working width: 5600 mm
Boom swing angle: ±30°
Hydraulic hammer pitch angle: 100°
Swing cylinder angle: ±90°
Drill arm extension: 1200 mm
Cab backward tilt: 15°
Cab lift: 400 mm
Water pump power: 0.5 kW
Water pump flow: 2 L/min

KQ311 →

Dimensions & weight — Overall dimensions (L × W × H): 8800 × 1750 × 2650 mm
Dimensions & weight — Weight: 12000 kg
Diesel engine: Cummins B3.9CS4-80C; 59 kW / 2500 rpm
Drive & handling — Drive system: Closed travelling system with four-wheel drive
Drive & handling — Swing angle: ±6°
Drive & handling — Tyres: 11.00-20
Drive & handling — Steering angle: ±40°
Drive & handling — Turning radius (inner / outer): 3150 / 5610 mm
Drive & handling — Travelling braking: Wet brake
Drive & handling — Maximum tramming speed: 10 km/h
Drive & handling — Maximum climbing angle: 25% (14°)
Drive & handling — Wheelbase: 3200 mm
Drive & handling — Wheel tread: 1400 mm
Drive & handling — Ground clearance: 300 mm
Hydraulic hammer: Shuishan SOOSAN SB30
Impact energy: 350 J
Impact frequency: 9-16 Hz
Drive flow: 25-40 L/min
Working pressure: 90-125 bar
Swing arm angle: ±30°
Translational arm pitch angle: 45°
Mid-arm lifting angle: 60°
Front-arm pitch angle: 95°
Hydraulic hammer pitch angle: 120°
Swing-cylinder angle: ±90°
Drill arm expansion and contraction: 1200 mm
Maximum working height: 8300 mm
Maximum working width: 8800 mm
Backward angle of cab: 15°
Cab lift: 400 mm
Water pump power: 0.5 kW
Water flow: 2 L/min
Lifting safety roof: FOPS & ROPS certified

Configuration & customization

Each rig can be configured to your project. Standard and optional packages include:

Breaker size options

Frequently asked questions

How do I choose between KQ21 and KQ311?

Compare the two rows in the model table above — focus on hole diameter, drilling depth and power against your project conditions. Our team can confirm the match for your site.

What applications is this series suited to?

Underground mining, Rock scaling, Ground support.

Can the equipment be configured to my project?

Yes — standard and optional packages are listed under Configuration & customization above. Send your project details through the inquiry form and we will confirm the matching configuration.