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 |
FORMATION METHOD OF COMPOUND BLAST | 2008 |
|
RU2364828C1 |
COMBINED CHARGE SHAPING METHOD | 2010 |
|
RU2425324C1 |
METHOD TO PERFORM BLASTING WORKS | 2012 |
|
RU2498210C1 |
METHOD FOR ROCK BLASTING IN OPEN PIT | 1992 |
|
RU2044998C1 |
METHOD TO CHARGE WEAKLY WATER-CUT DOWNHOLES | 2011 |
|
RU2482442C1 |
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 |
Authors
Dates
2012-06-27—Published
2010-12-27—Filed