基于多方法联合的崩落法崩矿步距优化

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Abstract In order to get exactly optimal rate of advance during ore breaking under large structural parameters，with the background of Meishan iron mine，combining application of similar material test and PFC2D numerical simulation，the optimization of the rate of advance was discussed in this structural parameters of 18 m×20 m. Based on similar material test，the draw body morphology characteristics were drawn under the structural parameters，and combined the mathematical model of the rate of advance during ore breaking and ore loss and dilution，worked out the optimal drawing pace is 6.12 m under the structural parameters. Five kinds of drawing pace schemes about 4.5，5.0，5.5，6.0，6.5 m，were analyzed using PFC2D. The results show that when the drawing pace is 6 m，the ore recovery index is optimal. Compared the result of laboratory drawing test and numerical simulation of drawing，and considered the relationship between the rate of advance during ore breaking and drawing pace，ultimately determine the rate of advance during ore breaking under 18 m×20 m structural parameters of the iron mine is 4.4 m. Contrasting this with the result of industrial test in Meishan iron mine，the conclusion of this paper is proper.

Key words： mining engineering non-pillar sublevel caving method rate of advance during ore breaking similar material test ratio difference between the recovery and dilution

Received: 31 October 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I4/754

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