The First Continuous Conveyor Behind a TBM
In 1963, the world’s largest TBM at the time, an 11.20 m diameter Robbins Main Beam, was built for the Mangla Dam Project. The unique project used a coal mine conveyor developed by James Robbins and Goodman, rather than muck cars, in the industry’s first-documented use of continuous conveyors for TBM tunneling. Muck was removed continuously from five TBM tunnels bored at the remote jobsite, making the prototype a great success.
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