- Published: Monday, 14 March 2016 14:38
- Written by E&MJ News
By Jared Kessen
While many underground mines are looking to avoid handheld rock drills for the safety of the miners, there are still many mines in North America, for example, where jackleg drilling is a must. For these narrow-vein mines, located primarily in eastern Canada and throughout Mexico, cabbed jumbos, bolters and long-hole rigs are not feasible due to cost and size restraints, and these operations depend on handheld rock drills—a technology that has changed relatively little in more than 70 years.