Mining or in situ disintegration of hard material – Processes – Stabilizing underground structure
Patent
1993-05-27
1994-11-29
Bagnell, David J.
Mining or in situ disintegration of hard material
Processes
Stabilizing underground structure
299 18, 299 43, E21C 3520, E21D 2300
Patent
active
053683692
ABSTRACT:
The present invention relates to an improved equipment useful for winning of ores particularly coal in longwal mining, the equipment comprises hydraulic master chock shield having atleast two legs at the outer edges, the master chock shield having a cylindrical conveyor belt intake end roller rotatibly mounted on a stand fixed to the base plate of the master chock shield, the base plate of the said chock shield also being provided with a plurality of stands having free moving conveyor belt guide rollers a plurality of known hydraulic chocks having atleast four legs at its edges, being placed in front of master chock shield in a horizontal line, the master chock shield and the chocks being interlinked by atleast one hydraulic ram, the base plates of each of the chocks being provided with plurality of stands having free conveyor belt guide rollers, the end chock also being provided with two horizontally fixed multi-telescopic booms supported on free moving wheels the extreme end of the booms being fixed to a fixed belt conveyor structure the fixed belt conveyor structure having free moving conveyor belt guide rollers a drive head conveyor belt roller being provided at the extreme end of the fixed structure.
REFERENCES:
patent: 3834762 (1974-09-01), Kakajima
G. Von Klinggraff "Schreitenousbau fur den" vol. 117, No. 8, Apr. 1981, Dt Bochum pp. 422-427.
Dhar Bharat B.
Maity Sibnath
Bagnell David J.
Council of Scientific & Industrial Research
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