METHOD FOR EXPLOSIVE REMOVAL OF MINERALS AND CONTAINING ROCK AT OPEN EXCAVATIONS AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2004 - IPC

FIELD: mining industry. SUBSTANCE: method includes replacement of individual wells of large diameter with sets, equivalent for total energy, of parallel wells of small diameter, which include number of charged wells which is increased by one in direction from wells bottoms towards operation area of shelf with a step ΔL_i which is determined on basis of formula. In each set total charge is formed variable along height with decrease from wells bottom to operation area of shelf. Boring of wells in sets is performed by means of device which contains self-propelled transport-force module and one or several non-self-propelled boring modules, which are connected to each other by a flexible hydraulic system. Non-self-propelled boring module is equipped by two or more hydraulic perforators. Its body is made in form of rigid parallelepiped and is equipped with boring frame. EFFECT: lower explosive material use and higher excavation efficiency. 2 cl, 5 dwg