摘要
目前,大型凿岩设备和无轨出矿设备在无底柱崩落法中得到普遍应用,大型设备运行的采场进路断面也相应增大。本文分析了端部放出口散体流动速度分布,揭示了端部放矿条件下放出口沿进路方向的散体有效流动范围,进路宽度及出矿方式对放矿的影响。指出增大放出口散体的有效流动范围,有利于顶部矿岩平稳下降。实际放矿中,应尽量增大铲运机的铲入深度,出矿方式应保持全断面均匀出矿,可使矿岩散体层平整与均匀下降,是降低矿石贫化与损失的有力措施。
At present, the large-sized drilling and LHD equipments are widely used in sublevel caving （SLC） and the cross dimension of sublevel drift is further enlarged with the mechanization. In this paper, the author set up the flowing velocity distribution formulas at the drawing outlet in SLC according to the characteristic pattern of blasted ores, and uncovered the influence mechanics to ore drawing in SLC by tak- ing into consideration of the effective flowing section towards the drift, the drift width and loading manner. It was pointed out that in order to reduce the dilution and the ore loss in discharging operation in SLC the loading depth of LHD should be augmented and the full face even-drawing style should be executed as much as possible so that the ore-rock interface moves downwards as plat as possible.
出处
《中国矿业》
北大核心
2007年第11期59-62,共4页
China Mining Magazine
基金
云南省自然科学资金项目(2006E0020Q)
云南省中青年学术带头人项目(2004PY01-6)
关键词
无底柱分段崩落法
端部放矿
进路宽度
有效流动范围
影响机理
sublevel caving
drawing on solid-wall
drift width
effective flowing section
influence mechanics
