基于抛掷爆破-拉斗铲倒堆工艺的露天矿生产能力研究

Study on surface mine capacity with casting blast-dragline stripping technology

分析了拉斗铲设备自身条件、抛掷爆破效果及开采参数对露天矿生产能力的影响关系,推导得出了露天矿生产能力的计算公式,采用敏感性分析方法研究了各因素对露天矿生产能力的影响程度。研究结果表明:倒堆台阶高度、拉斗铲稳态有效度和有效抛掷率是影响抛掷爆破-拉斗铲工艺露天煤矿生产能力的关键因素,其中倒堆台阶高度和拉斗铲稳态有效度是根本因素;实现33Mt/a的生产目标,应保证拉斗铲设备稳态有效度93.8%以上,同时将倒堆台阶高度降低至38m以下。

The influence relation of dragline equipment conditions,casting blast effect and mining parameters to surface mine output were analyzed,calculation formula of surface mine output was derived,impact of each factors on surface mine output was researched using sensitivity analysis method. Research results shows that casting bench height,dragline steady availability and effective casting blast rate are the key influencing factors for surface mine output adopting casting blast-dragline stripping,in which the former two are the fundamental factors. In order to achieve output of 33 Mt / a,dragline steady availability should be ensured more than 93. 8% and casting bench height reduced to less than 38 m.