Mine roof system

Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention

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Details

405259, E21D 2100

Patent

active

049463152

ABSTRACT:
Apparatus (1) for supporting a mine roof (R) has connected plates (7, 9) positioned against the roof at opposite sides of the mine roof. One plate (7) has an upset surface (13) contacting the roof to exert a compressive load on it. Bolts (53) anchor the plates to the roof. A tie rod (64) interconnects the plates and is adjustable to vary the compressive load, and in one embodiment a slip anchor (67) is provided at one end of the tie rod which can also be utilized to estimate the tie rod load.

REFERENCES:
patent: 715406 (1902-12-01), Meem
patent: 819361 (1906-05-01), Meem
patent: 3991577 (1976-11-01), Thevenoux
patent: 4073151 (1978-02-01), Harmsma
patent: 4274762 (1981-06-01), Johnson
patent: 4349300 (1982-09-01), Kelley
patent: 4456405 (1984-06-01), Galis
patent: 4601616 (1968-07-01), Barish et al.
Mangelsdorf, Current Trends in Roof Truss Hardware, Jul. 19-21, 1982, Second Conference on Ground Control in Mining.
Western Support Systems, Big Ben II Truss Bolt, Sep. 11, 1986.
Pattin Manufacturing, Roof Support Using Pattin Truss as Primary or Supplemental Support, Dec. 9, 1982.
James J. Scott and Brian R. Castle, A New Combination: Friction Suspension Support System Scott Cable Slings.
F. M. Locotos Co., Inc.; Double Bolt Truss.

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