关键词: 不良岩体, 上向进路式回采, 机械化, 高强度

Abstract: Due to the features of broken ore & rock,easily weathering and collapse with poor stability in Jinfeng Gold Mine, there are many problems such as blasting difficulties, poor tunnel molding, low mining efficiency in upward drift stoping and rockfill. Through integrating a series of technologies as large-diameter empty hole undercutting blasting, bottom hole protection, wet shotcrete + resin bolting support, the efficiency of tunneling was enhanced and the support effects were improved. With technology innovation, a new mechanized mining technique with high-intensity as strengthened digging, supporting, mining, backfilling had been achieved under poor rock mass condition. As a result, the tunneling efficiency reached 94.5%, and tunnel forming rate attained 100%, and mining intensity reached 42.5 t per work and shift. The integrated technologies have reached the international advanced level.

Key words: Poor rock mass, Upward drift stoping and backfill, Mechanization, High-intensity