梅山铁矿大结构参数下合理崩矿步距研究

Study on Reasonable Caving Space for Meishan Iron Mine with Large Structural Parameters

针对梅山铁矿亟需确定的18 m×20 m结构参数下最优崩矿步距取值问题,分析了优选最优崩矿步距的数学分析方法,确定以端部放矿实验为手段来测定该结构参数下放出体的形态特征,并利用放出体的形态参数,以回贫差为目标函数,通过求极值的方法,计算最优的崩矿步距。理论计算表明,崩矿步距对矿石回收指标影响较大,崩矿步距为4.31～5.38 m时,更有利于矿石回收。实践表明,用数学分析法确定的最优崩矿步距对生产实际具有一定的指导作用。

Aiming at the problem of determining the optimum caving space parameters under 18 m× 20 m structural parameters of Meishan Iron Mine, the paper analyzed the mathematical analysis which can optimize the caving space, the morphology of draw body under this structure parameters are simulated by tope dilution drawing experiment, and the morphology features of draw body is adopted to calculate the optimum caving space with the object of difference of recovery and dilution by using the method of getting the minimized. The results show that caving space influences the recovery- index evi- dently, and the caving space of 4. 31 -5.38 m has more advantage in recovery index. Practice indicates that optimum caving space identified by the mathematical analysis, has a certain directive function in production.