FIELD: mining.
SUBSTANCE: method includes preliminary drilling of one or several rows of blasting wells in rock-coal massif. During preparation to drying of rock-coal massif, blasting wells are drilled in line on working platforms of rock-coal massif along outline of dried rock-coal massif at a distance 3-5 m from each other, at that wells are drilled with subdrilling 1-3 m below mark of low dried projection, maximum height of dried rock-coal massif is limited by maximum drilling depth of drilling machine.
EFFECT: reducing the cost of rock mass to be exploded due to use of explosives non-resistant to water as a result of drying of the rock-coal massif to be exploded.
1 ex, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DRYING METHOD OF BLOCK TO BE EXPLODED DURING DIRECT COAL EXTRACTION TECHNOLOGY | 2010 |
|
RU2452859C1 |
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| METHOD FOR ROCK BLASTING IN OPEN PIT | 1992 |
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| OPEN-CAST MINING METHOD | 0 |
|
SU1089261A1 |
| PROCESS OF WORKING OF ROCK MASS CLOSE TO CONTOUR WITH FORMATION OF BENCHES OVER LIMIT OUTLINES OF EDGES OF PITS | 0 |
|
SU1818472A1 |
| WELL CHARGING METHOD | 2024 |
|
RU2823312C1 |
| METHOD OF DUST SUPPRESSION DURING BLASTING WORKS IN PITS | 2012 |
|
RU2513731C1 |
