METHOD FOR STEEP ORE DEPOSIT DEVELOPMENT Russian patent published in 2006 - IPC E21C41/22 

FIELD: mining, particularly underground ore deposit development.

SUBSTANCE: method involves dividing ore deposit into mining levels, cutting the mining levels in descending order and filling excavated space with hardening filling material, wherein filling material is supplied from day surface via main filling holes drilled in ledge wall rock outside shifting zone, which is formed in ledge wall rock during full ore deposit development. The first layer is cut from one mining level boundary along ore deposit strike in direction to another mining level boundary. Additional filling holes are drilled in zone defined by two lines before the first mining level cutting. The first line is extension of resulting excavated space boundary from ledge wall side. The second line is extension of the first mining level boundary along ore deposit strike, from which mining level is cut. Main filling holes are drilled before putting additional filling hole out of operation. If additional filling holes are arranged within the shifting zone forming in ledge wall rock during full ore deposit cutting additional holes are operated up to cleaning work development stage. At cleaning work development stage additional well deformation is equal to threshold deformation values. Safe additional hole operation is impossible if deformations exceed above threshold values. In particular case additional filling holes are made along bisector of angle defined by two lines, namely by the first line, which is extension of resulting excavated space boundary from ledge wall side, and by the second line, which is extension of the first mining level boundary along ore deposit strike, from which mining level is cut.

EFFECT: reduced mine construction time.

2 cl, 2 dwg, 1 ex