METHOD AND DEVICE FOR BOREHOLE HYDROMINING OF FRIABLE ORES (VERSIONS) Russian patent published in 2015 - IPC E21C45/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to mining through the reservoir-tapping wells. The method of borehole hydromining of friable ores consists in drilling of tapping wells, installation of casings, fitting of wells with working vehicles, the ascending extraction of the mineral with subsequent filling of the volume of extracted ore, supply into the working excavation through lines of compressed air, working medium and filling mix. Meanwhile ore is destructed by alternate creation in a working medium of high and low pressure by pneumatic impulses. Ore is excavated along the height to the value of design height of the chamber then the working vehicle is lifted to this height, the casing section at the level of the design height of the chamber is destructed, the chamber is filled with the filling mix and following such procedure ore reserves are extracted for the whole width of the well-tapped deposit.

EFFECT: increase of area of working excavation per well, ore destruction intensification, decrease of production losses, improvement of technological capabilities of borehole hydromining are provided.

3 cl, 12 dwg