DRILLING, BLASTING AND MECHANICAL METHOD FOR SPEED ARRANGEMENT OF UNDERGROUND MINES IN STRONG ROCKS Russian patent published in 2014 - IPC E21D9/00 F42D3/04 

FIELD: mining.

SUBSTANCE: method is performed using facilities of simultaneous drilling of boreholes with increased speeds of feed and rotation of bits and intensive washing of boreholes first in 2 vertical sectors, then, after rotation of a drilling faceplate by 90 degrees, in 2 horizontal sectors. After removal of the drilling faceplate from the bottomhole, the charging faceplate is fed with injectors-stems, and then boreholes are automatically charged with explosive substance, and explosion is initiated.

EFFECT: higher speed of mining, reduced time for bottomhole drilling, time of drilling and blasting works, increased frequency and resistance of a technological process.

3 dwg