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US 8,985,699 B2Granted
Mining methods and equipment
AssigneeSeneca Industries Inc.
InventorsTimothy J. Myers, Michael Cline, John Dickinson
Life of this patent
Estimating the term…
Abstract
Methods and equipment have been developed that combine the use of continuous miners, flexible conveyor trains, and longwall mining techniques to provide flexible and efficient removal of resources from subterranean formations. Some mining operations use a powered roof support comprising: a canopy configured to directly contacts a roof of a mine; a base configured to rest on a floor of the mine, the base comprising a spill plate and a push cylinder with a maximum stroke greater than 11 feet; and a pair of hydraulic legs attaching the canopy to the base.
Claims9
A powered roof support comprising:
- a canopy configured to directly contact a roof of a mine;
- a base configured to rest on a floor of the mine, the base comprising a spill plate and a push cylinder with a maximum stroke greater than 11 feet, wherein the push cylinder is a multiple-stage push cylinder with nested hydraulic chambers;
- and
- a pair of hydraulic legs attaching the canopy to the base;
- wherein the canopy extends from an end attached to the base to an opposite free end.
2 more elements
Dependencies are inferred from the claim text.