Method for reducing compressed air losses when driving undergrou

Details Method for reducing compressed air losses when driving undergrou Method for reducing compressed air losses when driving undergrou

1984-04-19

1986-11-18

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

299 11, 405150, E21C 3706

Patent

active

046231986

ABSTRACT:
A method for reducing compressed air losses when driving underground cavities which are supported by compressed air. The part of the inner cavity face exposed by mining is sealed by a viscous medium after breaking away the earth. With a supply of propellant, the viscous medium is applied, in the form of a spray mist which is directed toward the exposed part of the inner cavity face, in such a way that the mist penetrates the substratum without substantially destroying the exposed face. Particles of rock are thus prevented from being detached from the face which is to be sealed.

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patent: 4261670 (1981-04-01), Paban
patent: 4475847 (1984-10-01), Cornely et al.
Compositions and Properties of Oil Well Drilling Fluids by Rogers; 1948.

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