FIELD: mining industry.
SUBSTANCE: method includes performing opening and preparatory mining operations, cleaning operations with control by mountain pressure full destruction, drilling wells in prepared column and feeding cold water along them into extracted lava space. Deposit area is drilled with one or several wells deeper than frozen rocks limit down to water layer, cold water is extracted along well and supplied to extracted lava space, and before feeding water this space is filled with liquid inert gas in amounts necessary for later freezing of water. In winter season caved-in rock solids are previously cooled by cold air let out of wells drilled into extracted space.
EFFECT: higher bed is kept non-broken and displacements and holes on surface are prevented.
1 dwg
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