FIELD: mining.
SUBSTANCE: blasting in mining 4 or tunnelling face 9 is performed with shaft method. At that, within the contour of ore bode the blasting is performed by overmilling the ore mass owing to the fact that charges 13 are located as per the net determined with the value of diametre of the area of shattering action of those charges. Blasting of enclosing rocks within extraction power or the outline of the mine working is performed with coarse grinding by locating the charges at the distance equal to the diametre of their crack formation area. Separation of rock mass into ore and rock is performed by means of sieving at unloading points.
EFFECT: invention allows creating the conditions for providing high quantitative and qualitative properties of mining activities, as well as increasing the level of their mechanisation.
5 dwg
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