DRILL & BLAST
this project, new bit/rock interaction models of a single cutter/blade PDC will be developed. Professor Wiercigroch elaborates, “Tese models will be calibrated and validated by extensive experimental tests, to optimise the design of the new hybrid drill-bit with cutting structure combining shearing and gouging actions, having much greater longevity and efficiency when drilling through chert and fractured granite.”
CATCHING UP WITH CAT Caterpillar’s latest rotary blasthole drill, MD6200, went into production earlier this year.
Te company is calling it its “most
transportable rotary drill yet,” with a model 336 excavator-style undercarriage and small shipping envelope. It’s powered by a Cat C18 engine rated at US EPA Tier 4 Final or US EPA Tier 2 equivalent, depending on the local regulations where
Professor Wiercigroch
it’s sold. It is designed for holes of 127 to 200mm in diameter. It complements the MD6250 and MD6310, which went into production last year, adding to the two larger drills, the diesel-powered MD6540C and the electric (line power) MD6640 for drilling holes up to 406mm in diameter. Tis is most commonly used in mines with power distribution systems for electric shovels and/or draglines. Behind the scenes, the company has embraced new technology for development, with extensive 3D printing facilities to rapidly produce parts during product development and for testing design concepts, creating cost-effective manufacturing tools and printing low-volume service parts, precision models, training aids and even sales tools. Virtual reality is increasingly being used for maintenance.
Cat MD6200 Drill interior
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