摘要
大功率出矿设备投入使用使放矿口尺寸有增大的趋势。对此,本文研究了放矿口尺寸及散体放出速度分布对崩落法放矿的影响。发现放矿口对崩落矿岩移动的影响主要发生在放矿口附近的一定范围内,且当放出速度分布不对称时会导致放出体轴线偏移。文中给出了放矿口显著影响放出体高度及其最高点偏移量的计算式,并讨论了有底柱崩落法底部结构中斗井口合理位置的确定原则。
Nowadays an evident fact in block caving is that the increment in dia meters of draw hole(e. g. 3～4m) has significant effects on the result of ore drawing. This paper systematically studies how drawhole width and draw out-ore velocity distribution affect the law of broken ore movement. It has been found that the influence of draw hole on the law of ore drawing mainly occurs in a scope which is near draw hole, and the asymmetry of loose body flow velocity distribution in the level of draw hole can result in ...
出处
《有色金属》
CSCD
1993年第4期17-23,共7页
Nonferrous Metals
关键词
采矿方法
放矿
随机介质理论
mining method
ore drawing
stochastics medium theory
