Official Export Subsidiary of Kaishan Group (Est. 1956) | Quzhou Manufacturing Base
Our Quzhou engineering desk calculates the exact borehole diameter, rock hardness, and necessary CFM/Bar ratio for your project.
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Kaishan DTH Drilling Rigs
Heavy-duty surface crawlers and integrated rigs for open-pit mining, quarry blasting, and slope stabilization. High penetration rate and anti-jamming hydraulic system.
EQUIPMENT CATEGORIES
Quick Overview: The Kaishan KT7D is an integrated crawler down-the-hole (DTH) surface drilling rig engineered for open-pit mining, quarrying, and stonework blast-hole drilling. Powered by a 176 kW Yuchai Tier 3 diesel engine, it integrates an onboard 15 m³/min @ 18 bar screw air compressor, drilling ⌀90–135 mm holes up to 24 meters deep with an automated 7+1 rod changer, heavy-duty aluminum feed beam, and cyclonic dust collection.
In modern open-pit mining and quarry excavation, operational safety, fuel efficiency, and mobility are paramount. Traditional drilling operations rely on split systems—towing a standalone portable compressor behind a separate crawler drill—which creates logistical friction, extensive air hose pressure losses, and high multi-engine maintenance costs.
The Kaishan KT7D Integrated Open-Pit DTH Drill Rig eliminates these challenges by consolidating the rock drilling rig and high-pressure screw compressor onto a single, heavy-duty crawler undercarriage. Engineered to drill vertical, inclined, and horizontal holes, the KT7D excels in bench blasting, pre-splitting, and civil rock excavation across medium-to-hard rock strata (F=6 to F=20).
Powered by a 176 kW (2200 r/min) Yuchai YCA07240-T300 China Stage III / Tier 3 engine driving both hydraulic systems and the single-stage screw air compressor (15 m³/min, 18 bar). Lowers fuel consumption by up to 25% compared to split drill-compressor fleets.
Equipped with an automatic rod carousel (7+1 capacity for 3-meter rods) and hydraulic uncoupling mechanism. Enables continuous drilling down to 24 meters with single-operator controls, significantly reducing rod change downtime and manual labor.
High-strength extruded aluminum alloy propulsion beam delivers 22,580 N push-pull capacity with a 3,590 mm feed stroke. Highly resistant to bending and torsional stress, ensuring straight and accurate blast-hole alignment.
Integrated hydraulic cyclonic laminar flow dry-type dust collector captures airborne rock dust directly at the borehole collar. Ensures compliance with environmental regulations and provides a clean, safe cabin-side operating perimeter.
Features an automated oil-mist injection system that lubricates drill rod threads during connection and disassembly cycles, eliminating galling and prolonging drill string working life.
Heavy-duty crawler tracks with ±10° dual-direction frame leveling cylinders provide high stability and maneuverability across uneven benches, steep grades, and loose rock conditions.
| Parameter | Specification / Engineering Value |
|---|---|
| Diesel Engine Model | Yuchai YCA07240-T300 (National III / China Stage III) |
| Rated Power & Speed | 176 kW @ 2200 r/min |
| Screw Compressor Capacity | 15 m³/min (approx. 530 CFM) |
| Compressor Discharge Pressure | 18 bar (1.8 MPa / 261 psi) |
| Drilling Hole Diameter Range | ⌀90 – 135 mm (3.54 – 5.31 in) |
| Maximum Drilling Depth | 24 m (with 7+1 Rod Carousel) |
| Applicable DTH Hammers | 3-inch, 4-inch |
| Drill Rod Specifications | ⌀64 × 3000 mm / ⌀76 × 3000 mm |
| Rotary Speed of Gyrator | 0 - 180 / 0 - 120 r/min |
| Maximum Rotary Torque | 1560 / 1900 N·m |
| Maximum Push-Pull Force | 22,580 N |
| One-Time Advance Length (Stroke) | 3,590 mm |
| Compensation Length | 900 mm |
| Boom Lifting / Tilt Angles | Boom: Up 48°, Down 16° | Beam Tilt: 147° |
| Carriage & Boom Swing Angles | Carriage: R53°/L52° (or R97°/L10°) | Boom: R58°/L50° |
| Chassis Leveling Angle | Up 10°, Down 10° |
| Dust Collection & Rod Changing | Dry cyclonic laminar flow collector & Automatic rod handler |
| Operating Dimensions (L × W × H) | 8000 × 2300 × 2700 mm |
| Total Machine Weight | 10,000 kg |
A: The KT7D handles borehole diameters of 90 mm to 135 mm with a maximum rated drilling depth of 24 meters via its 7+1 automatic rod handling carousel and 3000 mm drill pipes.
A: An integrated rig mounts the screw air compressor and drill rig on one crawler chassis powered by a single engine. This eliminates trailing hose friction losses, cuts overall fuel burn by approximately 25%, enables single-person operation, and simplifies mine bench relocations.
A: The rig works efficiently with standard 3-inch and 4-inch high-pressure DTH hammers (e.g., DHD3.5, DHD340, QL40) paired with ⌀64 mm or ⌀76 mm drill pipes.
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Founded in 2022 in Quzhou City, Zhejiang Province. Operating as the global integrated export arm of Kaishan Group, delivering heavy-duty DTH drill rigs, water well exploration machinery, and screw air compressors worldwide.
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