FIELD: mining.
SUBSTANCE: method includes explosion of a rock mass above a coal bed and explosion of a coal bed. Drilling of wells is carried out with underdrilling to the coal bed soil. A decked charge is formed in wells. At the same time the air gap is arranged so that the distance from the contact of rock-coal to the charge arranged in the rock and coal parts of the massif is equal, more or equal to the radius of the crushing zone, accordingly.
EFFECT: invention makes it possible to reduce outages of mining transport equipment, to reduce number of blast-hole drilling operations, to eliminate damage of bed roof and dilution of coal in a contact zone.
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| DRYING METHOD OF ROCK-COAL MASSIF | 2010 |
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| SUSPENDED BOREHOLE PLUG | 2008 |
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| SUSPENSION WELL STEMMING | 2009 |
|
RU2409805C1 |
