Stress control mining method and apparatus

Details Stress control mining method and apparatus Stress control mining method and apparatus

1987-08-25

1989-06-06

Neuder, William P.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

299 19, 405299, E21L 2724, E21D 1544

Patent

active

048366129

ABSTRACT:
A method and apparatus for mechanized, stress control mining includes the process of continuously cutting and advancing a broad mine face to form a mine opening having a low aspect ratio and an envelope of ambient stresses in the earthen media that protects the roof and floor from failure. At the advancing face the roof is supported by the apparatus of the invention, a superlifting stress control machine. The stress control machine comprises a plurality of support column assemblies, each capable of lifting up to 10,000 tons. The support column assemblies are arrayed at the mine face, and are interconnected by telescoping hydraulic arms so that individual support columns may be unloaded and translated with respect to the operating, anchored support columns. Alternatively, the column assemblies may be mounted in groups on tracked vehicles for high mobility. The lifting element of the support column assembly is an inflatable hydraulic tube formed of plastic reinforced with layers of braided super-strength filament. The lifting elements are arrayed in layers of closely abutting elements and coupled to displace vertically an upwardly extending column. The column is formed of a densely packed bundle of hollow tubular members filled with an incompressible plastic or the like and wrapped by a plurality of high strength filaments to form a lightweight, superstrong column.

REFERENCES:
patent: 3077741 (1963-02-01), Haarmann
patent: 3592010 (1971-07-01), Gaskell et al.
patent: 3673807 (1972-07-01), Serata
patent: 3856356 (1974-12-01), Allen et al.
patent: 4679856 (1987-07-01), Lubogatsky et al.
patent: 4737051 (1988-04-01), Bull

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