TUNNEL DRIVING METHOD IN COMPLICATED MINE GEOLOGICAL AND HYDROGEOLOGICAL CONDITIONS Russian patent published in 2011 - IPC E21D9/00 E21F16/02 

FIELD: mining.

SUBSTANCE: method involves pre-planning of tunnel route as per the data of engineering geology and topography and tunnel driving. First, according to the route of the future tunnel there determined are underground water courses, their width, depth, specific yield, distance between them and direction of water movement. Tunnel driving is performed; at that, first, infiltration tunnel of small section is drilled, and then, parallel to it there drilled is the main tunnel with some delay; pillar is left between tunnels, which through the distance determined by technological necessity is cleaved by breaking off, or the main tunnel is driven after infiltration tunnel with absorption of its section. Along the route of infiltration tunnel there arranged are recesses in its wall, into which filters for water interception and reduction of hydraulic pressure are drilled from the surface. Drilling frequency of filters are chosen depending on the number of underground water courses, their thickness and considering water abundance of confined aquifers. At top and bottom of infiltration tunnel there also arranged are upward and downward filters; at that, the water supplied from all filters is collected in water diversion terrace of infiltration tunnel and diverted to safe place on the surface.

EFFECT: reducing construction cost, controlling big water flows, reducing hydraulic water pressure, providing reliable safe and dry driving of the main tunnel and non-overhaul operation in the future.

5 dwg