FIELD: mining.
SUBSTANCE: during method realisation, blast hole drilling works are designed based on geological data, blast holes are drilled, charged and driven, an electric explosion circuit is installed, and explosion is carried out. Borders of areas with hazardous gas dynamic events are applied onto mine layouts. At the distance of 1-3 m to the border of a hazardous zone and within it, borehole drilling is carried out with shortened, of not more than 1.4-1.6 m, blast holes, or according to the second version, drilling and blasting of the borehole is done as double-phased.
EFFECT: reduced costs, higher efficiency of tunnelling.
3 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DRIVING A HORIZONTAL MINE WORKING | 0 |
|
SU1751310A1 |
| METHOD OF BLASTINGS BY BURN CUT | 1996 |
|
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|
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|
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|
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|
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| METHOD FOR DEVELOPMENT OF ROCKS IN OPEN PIT RECONSTRUCTION | 2009 |
|
RU2395688C1 |
| METHOD OF BLASTING OPERATIONS IN GASSY MINES | 1996 |
|
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| METHOD OF BLASTING OPERATIONS | 1996 |
|
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| DRILLING-AND-BLASTING METHOD OF MINE WORKINGS IN STRESSED FRACTURED ROCK MASSES | 2011 |
|
RU2502045C2 |
