复杂开采条件下低品位镍矿安全高效回采方案研究

谭宝会,王永定,张志贵,龙卫国,李斌,何建元,龚臻

Study on Safety and Efficient Mining Scheme for Low Grade Nickel Ore Under Complex Mining Conditions

Baohui TAN,Yongding WANG,Zhigui ZHANG,Weiguo LONG,Bin LI,Jianyuan HE,Zhen GONG

表3 冒落胶结充填体二次破碎试验结果

Table 3 Experimental results of secondary crushing of caving cemented backfill

块度分级 块体尺寸/cm 占比/% 次级块度平均值/% 初始冒落块度平均值/% 差值/% 第1次试验 第2次试验 大块 >0.6 19.6 17.2 18.4 29.0 -10.6 中块 0.6~0.3 28.2 31.9 30.1 30.0 -0.1 次中块 0.3~0.1 25.9 26.2 26.0 23.0 +3.0 小块 <0.1 26.3 24.7 25.5 18.0 +7.5