Excavation accuracy, optimized performance and low-risk operation Sandvik DTi: Promoting continuous improvement in tunneling
Despite the successful receipt among the tunneling sites, further development of the DTi series is continuously on-going. Since the launch, the fruits of that work have brought into the machines additional practical features for accurate and fast tunneling such as WLAN remote access, iBOLT systematic bolting and total station navigation. Aspects of work site safety have been also carefully considered in the Sandvik DTi series, and the latest news include, among others, an Access Detection System that stops feed and rotation if a person is entering the working area of the booms. Other recently introduced features are high frequency RD5 series rock drills for optimized performance, and TIER4 engines.
In 2008, Sandvik launched new intelligent tunneling jumbos, the Sandvik DTi series, to the first market areas. Ever since, the series has been a great success, fast becoming the industry-leader in optimized performance, outstanding excavation accuracy and low-risk operation in almost every corner of the world.
Access detection decreases risks caused by human errors
The new Access Detection System enhances safe excavation by decreasing risks caused by human actions and errors. The system includes detection sensors on the sides of the jumbo. If a person is recognized in the detection field, boom operations – rotation and feed - will automatically be stopped. In other words, access detection prevents anyone from entering the working area of the booms while they are in operation. If boom operation is automatically stopped, the system must be de-activated with a separate reset by the operator before drilling is released. In addition to the Access Detection System, the DTi jumbos also feature a manual prevention switch for boom and drilling movements. Safety needs have been considered in the mechanical structure of the jumbo as well, in the form of yellow marking in all access ways, steps, ladders and handles. In addition, the spiral hoses are made of fire-resistant material. All these features greatly improve the work site safety.
RD5 rock drills for optimized performance
Sandvik DTi series jumbos are equipped with new, advanced Sandvik RD5 series high frequency rock drills. The RD5 series features low profile height and a patented stabilizer with an intelligent control system that dampens harmful shockwaves. The simple body structure of the drills along with their modular construction and visual wear indicators guarantee ease of use and maintenance. Built to last, the robust and reliable drills feature only few pressurized seams between functional modules.With 15 - 20 percent higher penetration rates and significantly longer tool life compared to HLX5*, the robust and reliable RD5 series rock drills offer carefully optimized, cost-effective performance.
Advanced supporting features
The DTi series features a TRH rod handling system, offering an ergonomic and mechanized way of extension rod handling. With its low weight, compact, durable and protected structure and cabin control, it meets the specific needs of any tunneling works. In addition to this, a centralizing rod retainer SCR holds extension rods in place during coupling and uncoupling. It also keeps the rod centralized while clamping.
Intelligent tunneling for outstanding accuracy
The computer-controlled Sandvik DTi series jumbos are famous for their outstanding accuracy. They come in five different models for excavation of 12 – 231 m2 cross sections, including face drilling, bolt hole drilling and long-hole drilling.
The DTi jumbos are designed for automatic use which translates into highest process repeatability and best possible excavation predictability. The user-friendly iDATA control system features full round drilling automatics, one hole drilling automatics and automatic boom positioning according to drill plan. The automatic functions also include boom self-collision detection and hole length control.
The further intelligence features in the DTi jumbos include data collection of production and process information such as round data, cumulative production data and drilling parameters logging that, in turn, help production logistics planning, scheduled maintenance and productivity improvement.
The DTi rigs are equipped with Sandvik iSURE® tunnel excavation management tool. This combination ensures optimized blasting as per plan, supplying better pull-out, decreased need for scaling, increased rock loadability and smoother collaring in the following round.
| RD525/520 IN BRIEF: | |
|---|---|
| Hole diameter, drifting | 43 – 64 mm |
| Hole diameter, cut hole drilling | 76 – 127 mm |
| Power class | 25/20 kW |
| Percussion rate | 94/74 Hz |
| Max. percussion pressure | 235/220 bar |
For further information please contact:
Satu Rämö
Global Marketing Communication Manager
Sandvik Construction
Office Phone: +358 205 44 151
Mobile Phone: +358 40 537 4020
E-mail: satu.ramo@sandvik.com
*40 % longer tool life for the shank and 17 % for the bits compared with HLX 5 in test conditions.