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
| Title | Year | Author | Number |
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RU2439485C2 |
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| TUNNELING COMPLEX | 1998 |
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RU2172405C2 |
| DRIVING OF MINE WORKINGS BY DRILLING AND BLASTING | 1989 |
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SU1743255A1 |
