Abstract: A mine roof-bolter machine having an extensible conveyor running therethrough operates behind a continuous miner machine. As the continuous miner advances, the roof-bolter advances from position-to-position while installing roof bolts and plates, and the extensible conveyor gives and takes the slack between the continuous miner and the roof bolter and feeds mined material to a surge car behind the roof bolter.
August 25, 1977
Date of Patent:
November 6, 1979
Peabody Coal Company, Inc.
John A. L. Campbell, Daniel J. Moynihan