| 摘要 |
FIELD: mining industry, in particular, working of rock bodies containing clay material. ^ SUBSTANCE: method involves providing mine development workings: haulage tunnel and ascending block workings; constructing artificial bottom; hanging trap-doors; laying hydraulic insulation between trap-doors; mounting perforated pipes in axially aligned relationship one inside another in breakage space at site opposite trap-doors, with perforated pipes being closed at their lower ends and being lengthened as block is worked out; before partial or general discharge of stored ore, injecting into broken ore via hoses through inner pipe mortars containing dispersants for saturating of clay material to fluid state; blasting pipes with pressurized air; before ore breaking process, putting protective shoe onto upper ends of perforated pipes. ^ EFFECT: reduced ore losses, decreased intensity of stored ore discharge works. ^ 2 dwg |
