The CAN® is a yieldable secondary roof support made from a confined core of cementitious composite, encased in a cylindrical steel canister, which resembles a can. The CAN® handles mine floor heaving and roof sag better than any other type of support available today. The CAN® is flexible in design in that it can be engineered to meet mine-specific load conditions regardless if the adverse conditions are induced by the roof or the floor. The simple 1 piece design of the CAN® installs quickly using a mine scoop or similar piece of equipment. The smooth steel skin of the CAN® improves ventilation and promotes air flow by reducing resistance in the mine entry. When installed correctly, The CAN® has never failed.
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A limestone mine in the eastern half of the United States contacted Burrell Mining International about providing ideas to add supplemental support for a portal entry which had several linear anomalies in the mine roof running perpendicular to the entry. This portal opening was especially important due to the future installation of an inline mine fan.
Adding to the complexity of the problem:
The team at Burrell Mining worked with mine management to design and provide a supplemental support system to alleviate the problems in the roof; fit into the less than optimal mine environment; was a long-term solution which offered low resistance to the future mine ventilation system.