METHOD FOR OPENING WORKING HORIZONS OF PITS UNDER COMPLICATED HYDRO-GEOLOGICAL CONDITIONS

摘要

The invention relates to openwork of mineral deposits, in particular to the technology of the penetration of an inclined trench during opening of working horizons of pits in complicated hydrogeological conditions. According to the invention, an inclined advancing trench is penetrated with excavator with lower scoop in the end part of the penetrated entrance trench, the inclination equals to the inclination of the entry trench, with a sump. Then the penetrated inclined advancing trench is deepened by cutting its bottom with the excavator with lower scoop operating with return movement, while the shipment of mined rock mass is performed by automobile transport. The invention provides intensification of works for deepening of the pit and ensures safe conditions of openwork during opening and commissioning of working horizons of pits in complicated hydrogeological conditions.