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07/26/07 | 1 views | #20070170771 | Prev - Next | USPTO Class 299 | About this Page    monitor keywords

Underground mine and method of mining

USPTO Application #: 20070170771
Title: Underground mine and method of mining
Abstract: A method of underground mining includes mining material using a continuous miner to form at least one set of entries comprising a plurality of entries. A plurality of crosscuts extend between and connect the entries. A plurality of pillars are defined by the entries and crosscuts. The entries and crosscuts define a passage having a roof, a floor, and sidewalls. The pillars at least in part are adapted to prevent the roof of the passage from collapsing. Roof bolts are installed in the roof of the passage. Material is mined from the sidewalls of the passage with the continuous miner to form perimeter cuts extending outwardly from the passage. The perimeter cuts are free of roof bolts. At least approximately 30 percent of the material mined from within the set of entries is derived from the unbolted perimeter cuts. (end of abstract)
USPTO Applicaton #: 20070170771 - Class: 299 19 (USPTO)


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Industry Class:
Mining or in situ disintegration of hard material

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