Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent
1996-03-11
1998-06-23
Bagnell, David J.
Mining or in situ disintegration of hard material
Processes
Stabilizing underground structure
405296, 299 19, E21D 2303, E21C 4116
Patent
active
057695040
ABSTRACT:
Shortwall mining equipment for extraction of some pillars in an underground coal mine has a series of self-advancing powered roof supports (1) for placement along the pillars (2) under extraction, the pillars under extraction being located within a panel (3) which is surrounded by barrier pillars (4), an armoured face conveyor (5) fixed to the barrier pillars, a light duty chain conveyor (18) and a belt conveyor (19). Each of the self-advancing powered roof supports (1) has at a goaf end a support mechanism (6) on a base frame (14) with a side shield (7) and hydraulic ram side arms (10). The base frame (14) is provided with front and back side hooks (11 & 12) to facilitate pulling of the support mechanism (6). The armoured face conveyor (5) is provided with a shearer (15) having a cutter drum (16) coupled with a centrally located ranging arm (17), an outbye end of he armoured face conveyor (5) being at a right angle to and set upon the light duty chain conveyor (18) as a freely advancing bridge. A light duty chain conveyor (18) is connected to the belt conveyor (19) at an outbye of the panel (3).
REFERENCES:
patent: 3848420 (1974-11-01), Allen et al.
patent: 4041714 (1977-08-01), Allen
patent: 4268088 (1981-05-01), Price et al.
patent: 4526495 (1985-07-01), Becker et al.
patent: 4747729 (1988-05-01), Urschitz
patent: 5368369 (1994-11-01), Maity et al.
Dhar Bharat Bhushan
Maity Sibnath
Mukherjee Sibnath
Bagnell David J.
Council of Scientific & Industrial Research
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