PROCEDURE FOR DEVELOPMENT OF THICK STEEPLY-DIPPING DEPOSITS OF UNSTABLE ORE Russian patent published in 2009 - IPC E21C41/16 E21D11/00 

FIELD: mining.

SUBSTANCE: procedure for development consists in excavating layers with primary stopes mined in ore massif and with undercutting stopes driven in direct vicinity from filling mass and in supporting stopes with framed support. When driving the primary stope, there are assembled frames of the support consisting of a roof beam and two props. At driving undercutting stopes there are assembled frames of the support, each consisting of the roof beam and one prop located from the side of ore massif; the second end of the roof beam of the support of the undercutting stopes rests on filling mass. Before filling the undercutting stope driven from one of sides of filling mass formed in the primary stope, nearest to it props of the support of the primary stope are removed. Before filling the undercutting stope driven from another side of filling massif formed in the primary stope the roof beams and the second props of the support of the primary stope are removed. When there are used the roof beams of rectangular shape, width of the undercutting stopes is accepted below width of the primary stopes at a value equal to length of the section of the roof beam of the support of the undercutting stope resting on filling mass. While supporting stopes of rectangular or trapezoid shape with the framed support, there are used metal props consisting of two elements connected with a wedge-shaped lock.

EFFECT: preventing dangerous failures of host rock and reducing costs for stopes support.

3 cl, 4 dwg