METHOD FOR OPEN UNDERGROUND DEVELOPMENT OF MAIN INCLINED MINE OPENINGS (SHAFTS) Russian patent published in 2014 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: method involves preliminary preparation of front of preparatory works by furnishing an industrial site, according to a technological scheme of shaft development by means of an underground method, starting from the shaft mouth and the shaft part on depositions by excavation and loading of soil in a working face by means of manual tools, output of soil and delivery of support elements in a disassembled form by end hauling along the shaft with installation of a safety barrier, assembly and installation of metal supports in the working face according to an attachment step with force in the form of a hexagon by electric welding, ventilation by a local ventilation fan and pumping-out of ground water from the working face by means of pumps. First, according to the specified direction towards the industrial site structure there developed from the ground level along depositions is an open trench by means of excavation equipment throughout the length, according to a mining and technical and economic design and a shaft performance certificate, then at the trench bottom in depositions there mounted from the ground level is a mouth and a mine opening - a shaft by hoisting equipment and as erection of mine opening - shaft support advances, the trench is backfilled in depositions with excavated soil so that clearance space is left on the downhole side. With that, shafts are ventilated by natural draft, and water is pumped out by excavation equipment - an excavator bucket together with soil excavation.

EFFECT: simultaneous performance of a mouth and some part of shaft development along depositions by furnishing the industrial site and increase of shaft development rate along depositions and excluding intensive manual labour.

4 cl, 6 dwg