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UNDERGROUND DRILLING_proof 25/05/2016 11:02 Page 3 UNDERGROUND DRILLING Safety precautions, like automatic drill stoppage prevent accidents and ensure high security for both the machine and the personnel. ”Simba S7 increases flexibility and precision while the operator-friendly work environment ensures safety and work satisfaction. Simba is the art of engineering, precision and automation combined in one machine,” says Larslin. In terms of the drills themselves, the COP1838+ and MUX+ are Atlas Copco’s hydraulic top hammers, designed to excel in tough working conditions. Engine options include the Deutz 4cylinder, D914 L04, EPA III/COM III (Tier 3/Stage IIIA) approved 4-stroke prechamber diesel engine (55 kW, 77.8 hp at 2,300 rpm, 270 Nm at 1,500 rpm). The Rod Handling System RHS 10 (10+1 rods) allows mechanised drilling up to 20 m. The Simba S7 completes the range of Simbas and Atlas Copco believes that there is now a Simba model “to fit all mining applications.” The Simba S7 is available in all markets. The company says that the model is a hydraulic longhole rig but one which helps maximise productivity in small spaces and in tough conditions. “The Simba S7 is a compact longhole production drill rig – highly manoeuvrable in small to medium drift sizes. Simba’s wellproven control system add-on increases automated functionality. Choose what level of automation you need to optimise your planning, monitoring and performance. Versatility Modular automation solutions mean you can do more with your Simba S7. The control system includes ABC Regular, our One Hole Automation System. The Extractor option gives the operator more control of the drilling process in broken rock conditions. Drill Plan Handling and Void Detection options add even more value to your investment.” “Safer working conditions add value to your operations in the form of happier, healthier personnel and decreased stoppages. Safety precautions like automatic drill stoppage prevent accidents involving both personnel and equipment. Add-on automation, including teleremote control, greatly improve the operator’s work environment. The automation ready Simba S7 gives you the power to continually upgrade your machinery with the functions you need. Enhance the overall productivity of your operations by allowing drilling through shift changes and breaks.” Atlas Copco offers several levels of service agreements to meet the requirements of different operations. “Our service agreements help you build a quality operation focused on proactive, planned maintenance to minimise unplanned downtime. We support maintenance with detailed parts information on every piece within our full inventory of components, accessories, and tools.” Sandvik goes top centre in underground top hammer three front buttons – depending on diameter size – a few millimetres above the gauge buttons located on the periphery of the bit. Furthermore, the front buttons are set at a slight angle relative to the symmetric axis of the bit. The raised front creates a somewhat recessed hole bottom pattern that alters the rock-breaking action to achieve improved performance. In addition to the new design, the top centre bit also features a new, innovative cemented carbide grade, the GC80. “The problem with the Solving a problem a customer experienced when drilling in abrasive rock conditions has led to a “groundbreaking new design for drill bits”, according to Sandvik. The new top centre drill bits “which incorporate the largest upgrade to face drilling bits in decades, are now available as standard products in three sizes.” Primary applications include face drilling and bolting in both mining and tunnelling environments, where long bit life is essential in cutting costs and improving productivity. “The top priority when developing the new top centre drill bit was to increase service life. Since the main reason for discarding a drill bit is excessive wear on the diameter, the simplest way to achieve longer service life is to add more gauge buttons. However, this can prove problematic because of the minimal space available. Furthermore, an increase in the Bits Mining number or size of the Rods Construction Couplings Quarrying carbide buttons Shanks Tunneling generally decreases the DTH Water-well penetration rate: the ® same impact force yields R o c k M o r e® International a lower net force per Rock Drilling Tools button.” Wilsonville, Oregon USA Judenburg, Austria The new design Tel [phone] Tel [phone] solves these problems [email protected] [email protected] with a so-called raised front, elevating two or Drill More with RockMore JULY 2013 | International Mining 89