Roof Bolt Anchorage at Michel Colliery
The use of roof bolting gave promise of substantial economic benefits to Continuous Miner operations at Michel Colliery. As the first step in the adoption of bolting, 142 anchorage tests, employing six types of anchor shells, were made in three mines. Significant differences were found in the anchorage capabilities of the various shells and the various roof rocks.
Anchorage, bolting, hydraulic jack, NORTH MINE, shell, Bolts, Displacement, Load, Mine, Mines, Rock, Rocks, Roof bolting, Shell