FIELD: blasting operations.
SUBSTANCE: method involves drilling of bore pits in a working face or an entry way, their charging with explosives and delay-action blasting. Average distance between bore pits in the working face, the number of bore pits and specific consumption of explosives per working face is determined mathematically, depending on the mine working cross-sectional area, mass fracturing parameters, physical and technical properties of rocks, friction coefficient, value of rock pressure in mass, detonation characteristics and geometrical parameters of explosives.
EFFECT: obtaining the specified BER, reducing the oversize yield, reducing costs for drilling and blasting work; as a result, this will improve efficiency and safety of drilling-and-blasting work at development of mine workings and ore breaking in layered entry ways.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR OBTAINING A PRESET CRUSHING RATIO OF FISSURED MOUNTAIN MASS AND THE REQUIRED COEFFICIENT OF HEADING ADVANCE PER ROUND TO SHOT HOLES LENGTH RATIO | 2010 |
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| METHOD OF CUT-HOLE FORMATION | 2007 |
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| PROCESS OF DESTRUCTION OF ROCKS WITH DRIVING OF WORKING IN THEM | 1992 |
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| METHOD FOR CONTOUR DESTRUCTION OF FRACTURED ROCKS WITH PRELIMINARY CONTOURING | 2024 |
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RU2827216C1 |
| METHOD OF DRIVING A HORIZONTAL MINE WORKING | 0 |
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SU1751310A1 |
| METHOD OF DESTRUCTION OF FROZEN SOIL DURING DRILL AND FIRE EXCAVATION | 2014 |
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RU2554359C1 |
