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Pits & Quarries
Equipment Spotlight: Construction drills
By Aggregates & Roadbuilding Staff
By Aggregates & Roadbuilding Staff
Compact drill rig increases flexibility
Atlas Copco has introduced the Mustang 4-F1 compact drill, a down-the-hole, track-mounted rig that can tackle difficult drilling assignments in tight areas. Offering high ground clearance and ease of handling and transport, it is designed for a variety of construction, geotechnical and geothermal applications.
The Mustang 4-F1 can drill 100-150 mm diameter holes to a depth of 90 m. Its top-head rotary design works with Symmetrix drilling systems for casing advance and extraction, as well as all COP, QL and TD down-the-hole (DTH) hammers. The machine features wide pads for reduced ground pressure in soft terrain conditions. Other features include a newly designed rotation unit, a compact and centred operator’s panel with easily accessible controls, a new rod holder and breaker, a newly designed feed cradle assembly and new winches.
Top hammer drills designed to eliminate guesswork
The recently introduced DPi series of top hammer rigs from Sandvik features advanced technology that provides the user with detailed information on the drilled metres and holes, diesel and percussion hours, the amount of burned fuel and on the condition of the drill.
The Sandvik DPi series is the next generation to the Tamrock Pantera range of 76-150 mm diameter top hammer rigs for construction, quarry and open pit applications. The rigs have an advanced user interface with simple screen views for different operations. The joysticks are armrest-integrated for increased drilling comfort. The rigs are equipped with high frequency drifters and an easily adjustable drilling control system with all parameter settings in the operator’s cabin. There are several preset drilling parameters for different rock conditions and the system is capable of storing suitable settings for each of the sites where the drills work. According to Sandvik, optional one-hole automatic drilling to depth assures a stable drilling result and the optional automatic feed alignment system, significantly boosts drilling time.
The DPi drills are described as fast, nimble and easy to turn. The optimized centre of gravity keeps the rig balance unchanged even when oscillation in unlocked, states the manufacturer. The large fuel tank is sufficient for two shifts. Low fuel consumption is achieved with smart technology such as a load-sensing compressor pressure control, active diesel RPM control and ambient oil cooler fan control.
The DPi series cabin features air conditioning, a double roof, an air filtration system, selective glass windows and optional roller shutters for a more comfortable work environment. Rig servicing has been simplified by easy to reach service points and components. In case of breakdown, the rigs offer step-by-step troubleshooting instructions and a self-diagnostic system that makes fault-finding quick and easy.
Sandvik has also introduced its new NoiseGuard muffler system for significantly reducing surface top hammer drilling noise by 10 dB(A) in the surrounding area of the work site. Furthermore, the system lowers cabin noise levels by 8 dB(A), making a safer, more productive environment for the operator.
The muffler system basically consists of a hood and insulation for the rock drill. The hood is composed of a highly durable plastic material with thin, perforated aluminum plates used for insulation. The plates stay in place even in heavy vibration to block echoes, states the manufacturer. Also, the plates do not absorb moisture.
Weighing only 450 kg, the hood covers the feed only and does not affect the stability of the rig. The view from the cabin in unobstructed as the muffler opens hydraulically for rod changing. The hood is easily removable if not required at a particular site.
The muffler system is designed for Sandvik DX type (former Tamrock Ranger) self-propelled, self- contained hydraulic crawler drill rigs with a revolving superstructure and articulated boom.