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02/2005, 7
FIELD: mining industry. ^ SUBSTANCE: method includes conditional separation of levels on chambers, which are made in form of stretched upwards hexahedron and... 
MINING OR QUARRYING | FIXED CONSTRUCTIONS | EARTH DRILLING | MINING
Patent
06/2005, 7
FIELD: mining industry. ^ SUBSTANCE: preparation of resources of ore body is performed by driving in main level and on other levels of field backup drifts,... 
MINING OR QUARRYING | FIXED CONSTRUCTIONS | EARTH DRILLING | MINING
Patent
06/2005, 7
FIELD: mining industry. ^ SUBSTANCE: method includes separation of a level on hexahedral sections of upwardly elongated shape and is prepared by driving of... 
MINING OR QUARRYING | FIXED CONSTRUCTIONS | EARTH DRILLING | MINING
Patent
06/2005, 7
FIELD: mining industry. ^ SUBSTANCE: method includes dividing a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field... 
MINING OR QUARRYING | FIXED CONSTRUCTIONS | EARTH DRILLING | MINING
Patent
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