Fire in the hole
Better aggregate production begins with proper drilling and blasting. Here’s a selection of drilling and blasting equipment on the market today.
By Kerry Clines, Senior Editor
Atlas Copco says its ROC T35M is equipped with a COP 1840 rock drill, which uses less energy to achieve high penetration rates, and a modular design developed for the next generation of surface crawlers. The rig’s hydraulic-based control system adjusts in real time to match rock conditions. Cylinder-driven feeding is said to ensure constant contact, resulting in higher quality, straight holes.
Sandvik says its DP1500i is an intelligent, hydraulic, self-propelled, crawler-based top hammer drill. Intelligent systems provide information on the condition of the drill and the work performed, among other performance factors. The drill’s new GT60 system, available in 60-, 87-, and 96-mm diameter sizes, features a shoulder-drive tube design said to deliver added life and straight holes.
Raimonde Drilling says its Versa-Sonic Drill produces high-frequency downward-pressure vibrations, which result in fast and accurate drilling. The drill is said to be capable of super speed in unconsolidated material, truly representative continuous samples, easy installation of well materials and instrumentation, and less derived waste.
J.H. Fletcher’s new Graphic Operator Angle Display (GOAD) system uses sensors on the drill boom and feed mechanisms that display hole angles and depth of drilling on an in-cab monitor, allowing precise hole placement and direction. According to the company, more tons at a lower cost is one of the advantages of the system, as well as improved roof and rib control, which reduces scaling time and improves worker safety. The system also monitors the flushing pressure, so that when the pressure drops, the system automatically retracts the drill and steel.
The REICHdrill C-550-DII can drill 5- to 6 3/4-inch holes to a maximum depth of 148 feet with 30-foot drill pipe. Maximum rated pull down is 35,000 pounds with bit loading to 40,000 pounds. It is available as a low- or high-pressure drill with 900 to 1,070 cubic feet per minute for rotary and DTH.
These blasting products can help you achieve a good blast, which can lessen the amount of crushing required to get the saleable material desired.
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