基于相似物理实验的崩矿步距优化研究  

Optimization Research on Independent Advance of Ore Breaking Based on the Similar Physical Experiment

作　　者：郭进平[1] 王小林[1] 汪朝[1] 王靖[1] 李明[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055

出　　处：《矿业研究与开发》2017年第2期66-69,共4页Mining Research and Development

摘　　要：为确定四方金矿17m×20m结构参数下的最优崩矿步距,在实验室开展相似物理实验,通过端部放矿实验测定放出体形态参数,在此基础上建立回贫差计算模型,确定理论上的最佳放矿步距为5m。为减小数学分析法的误差,选取4,4.5,5,5.5 m等4个放矿步距开展多进路放矿实验,以回贫差作为放矿效果的评判依据,确定最佳放矿步距为4.5m。考虑挤压爆破条件下的矿石松散系数为1.3~1.4,最终确定四方金矿17m×20m结构参数下的最佳崩矿步距在3.2~3.5m之间。In order to determine the optimal independent advance of ore breaking with 17 m 〉（ 20 m structure parameters of Sifang gold mine, the similar physical experiment was carried out as follows. Through the side ore drawing experiment, the shape parameters of drawing body were measured. On this basis, the difference of recovery and dilution calculation model was established, which obtained that the theoretical optimal drawing pace was 5 m. Aiming at reducing the error of mathematical a- nalysis method, the four drawing paces including 4, 4.5,5, 5.5 m were selected to conducted ore drawing experiment with mul- tiple routes. Based on the difference of recovery and dilution as the basis of ore drawing, the optimal drawing pace was deter- mined as 4.5 m. Considering the ore loose coefficient of 1.3~ 1.4 under the condition of squeeze blasting, the optimal independent advance of ore breaking with 17 m×20 m structure parameters was ascertained between 3.2 -3.5 m in Sifang gold mine.

关 键 词：端部放矿 多进路放矿 回贫差 崩矿步距 

分 类 号：TD853.31[矿业工程—金属矿开采]