PILLAR REMOVAL METHOD Russian patent published in 2006 - IPC E21C41/22 

FIELD: mining, particularly for underground ore deposit mining.

SUBSTANCE: method involves isolating pillars in block with the use of webs; filling goaf; forming preparation development workings; drilling wells; loading pillars with charge; blasting pillars; discharging and delivering ore mass. The pillars are isolated with flexible netted webs having cell dimensions equal to 0.7 of central filling particle diameter. Separation strips are simultaneously installed between the webs. The distribution strips are connected with each other by means of connection and load-bearing ropes fastened to roof. Goaf is filled with loose filling material. Pillars are blasted simultaneously in the whole block. Ore is discharged from each pillar over the full block section in equal portions. The web may be formed of Rabitz type steel-wire fabric or of polymeric net.

EFFECT: reduced labor inputs for filling work performing and increased safety thereof.

3 cl, 6 dwg