US2017268335A1PendingUtilityA1
Mining systems
Est. expiryMar 14, 2033(~6.7 yrs left)· nominal 20-yr term from priority
E21C 27/00E21D 23/0091E21D 23/12E21C 27/24E21C 41/16E21F 17/06E21F 13/068E21C 41/18E21D 11/40
52
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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 systems include: a main gate; and a tailgate connected to the maingate by an active mine face; wherein the active mine face extends at an angle between 95 ° and 135 ° relative to the maingate.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A system for extracting material from subterranean formation, the system comprising:
a main gate; a tailgate connected to the maingate by an active mine face; wherein the active mine face extends at an angle between 95° and 135° relative to the maingate and the active mine face extends between 200 feet and 700 feet from the maingate to the tailgate.Cited by (0)
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