PROCEDURE FOR DEVELOPMENT OF THICK ORE DEPOSIT Russian patent published in 2009 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: procedure for development of thick ore deposit consists in dividing it into sub-floors, in driving transport, ventilation and drill moving-in mine workings, in drilling explosive radial boreholes, in blasting sections with thickness equal to one-two "ЛНС" and in ore chute from end of excavation by means of bucket material-handling machines. Connections are made between drill moving-in mine workings, out of which pillar is drilled between mined drill moving-in workings and is exploded before beginning of mining this section with underlying horizon. Simultaneously pillar above connection is destructed on a specially prepared cut crevice. Breaking of ore from underlying horizon is performed at height of one sub-floor, which facilitates increasing its height to 30 m; due to more uniform distribution of explosive material -EM in massif quality of ore crushing is improved. After destruction of pillars between drill moving-in workings and above connection for reduction of losses there is performed partial ore chute from ends of connection.

EFFECT: increased efficiency of development, reduced losses and reduced ore dilution.

2 cl, 3 dwg