METHOD FOR OPENING WORKING HORIZONS of open pits in complex hydrogeological conditions

摘要

A method for opening working levels of an open pit involves penetration of inclined entry trench with extraction of rocks with a straight shovel type excavator, installed inside the trench and working with loading rocks to the road transport means that are at its level of location. In the circuit of entry trench with excavator with bottom digging there is penetrated an inclined advancing trench with a slope equal to the slope of the entry trench and the width at the bottom equal to the width of the single-lane road, the distance to the plane between the excavators faces is to be at least 25 m, with a slope of the trench 80 ‰, for providing location of the mechanical shovel at least 2 m above the bottom of the lower face of the excavator with lower digging.