METHOD OF CREATING PROTECTIVE SHIELD IN ROOF OF DESIGNED MINE WORKS (VERSIONS) Russian patent published in 2016 - IPC E21D11/00 E21D9/00 E21D20/02 

FIELD: mining.

SUBSTANCE: presented group of inventions relates to methods of making protective screen designed in roof of projected mine workings. Feature of first version of method consists in drilling of wells is performed from one of two or two existing adjoining screened zone of mine workings, perpendicular or parallel projection respectively parallel adjacent to each other working at, pitch t between parallel geometrical axes of wells. Method according to second version consists in fact that in middle part of screened zone auxiliary mine perpendicular to projection parallel adjacent to each other working at or in one of diagonal directions screened zone. Drilling of wells is performed from auxiliary mine working, keeping pitch t between parallel geometrical axes of wells. Size of pitch t is determined depending on outer diameter of tubes-anchor, coefficient of attenuation factor structural rock on scale of M. M. Protodyakonov, bending resistance moment of cross section of pipe-anchor, permissible voltage of tube material bending-anchor, volumetric weight of rock being flight cleaning mine working, as well as angle of intersection of projections on screening plane geometrical axes of wells and designed mining of mine workings.

EFFECT: technical result consists in creation of protective shield with high screening surface in loose ores, which provides technological possibility and cost-effectiveness of driving of excavations in form of mining tapes; each version of method involves drilling in rock mass, at least one previously developed mine working of parallel wells and placing in drilled wells pipes-anchors.

10 cl, 25 dwg