Device for closing off a mine gallery especially for use to prev

Details Device for closing off a mine gallery especially for use to prev Device for closing off a mine gallery especially for use to prev

1975-06-11

1977-07-19

Gilliam, Paul R.

Mining or in situ disintegration of hard material

Processes

Forming blocks

49 34, 61 45F, 299 12, E21F 500

Patent

active

040360245

ABSTRACT:
A device for closing off a mine gallery, especially for use to prevent spreading of underground explosions, in which a bag of flexible substantially airtight material is first inflated with a gas under pressure, for instance air, until the inflated bag engages with its peripheral surface the inner face of the mine gallery, whereafter a flowable material is pumped into the interior of the bag, displacing the gas under pressure, which is permitted to escape through at least one overpressure valve provided in an uppermost portion of the inflatable bag. The material to be pumped into the interior of the bag is of a nature which quickly hardens after being pumped into the bag to thus provide a solid barrier extending across the mine gallery.

REFERENCES:
patent: 3750407 (1973-08-01), Heierli et al.
patent: 3831318 (1974-08-01), Richmond
patent: 3886751 (1975-06-01), Labora

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