Push pull mining system

E - Fixed Constructions – 21 – C

Patent

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262/6, 262/9

E21C 35/20 (2006.01) E21C 25/60 (2006.01) E21C 41/16 (2006.01) E21F 13/04 (2006.01)

Patent

CA 1075728

ABSTRACT OF THE DISCLOSURE A push-pull mining system is provided herein comprising a pre-formed arrangement of personnel entry shafts, laterally extending service tunnels, flumes in the form of ditches extending substantially throughout each service tunnel, a holding tunnel at one side of each service tunnel and a chamber be- low the lowermost service tunnel at the end opposite to the holding tunnel for receiving a separation tank, a slurry mix tank, and an underground water res- ervoir. A mobile mining unit, including a mining mechanism is initially disposed at each end and carriers therebetween, is of substantially the same length as the holding tunnel. The mobile mining unit moves across the service tunnel to mine the opposing face and form a working tunnel which, when finished, is of the same length as the mobile unit. A mobile water station is mounted in the ser- vice tunnel and is connected to the mid-carrier which conveys the water to the mining machine at the end which is effective. A flexible slurry line extends from a slurry mix tank in each mining machine to the mid-carrier where it is connected to a fixed slurry line by a three-way valve. The flexible slurry line extends along a working tunnel and is then diverted or bent into the ser- vice tunnel. A reverse drive motor is positioned in the service tunnel and en- gages the fixed slurry line to move it in reverse directions as the mobile min- ing unit moves back and forth across the service tunnel to form additional working tunnels. The fixed slurry line opens onto the flume when in a retrac- ted position but when advanced to a predetermined extent enters the upper end of a downflow slurry tube. The latter extends to a separation tank from which mineable material is passed to a main slurry mix tank. It is moved outwardly to the ground surface through a tube. Water for the slurry mix tanks in the mining unit is supplied from either a surface reservoir or an underground res- ervoir. This mining system is more efficient and economical than previous sys- tems and offers safety features with regard to personnel entrapped underground.

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