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近几年来,地下金属矿开采的趋势是日益加大爆破量(通常每次爆破的矿量超过10万t)。加拿大采矿工业在发展垂直后退式采矿法(VRM),大直径深孔采矿法(LBH)和锚索支护加固围岩和防止贫化方面处于领先地位。为了运出爆落的大量矿石,必须研究有效的装运系统。本文根据一预先规定的(但却是典型的)回采方案,阐明对以下几种装运系统的技术经济推断: 1.用铲运机间断装载; 2.用铲运机配矮车身自卸汽车间断装载; 3.配矮车身自卸汽车的连续装载(基于AL-60型连续装载机的装载作业费用)。根据一斜坡道掘进工程采用AL-60型连续装载机获得的实际结果,与巷道掘进中采用间断装载的分散开采(小矿量)相对比,用连续装载将可体现出集中开采(从一个装矿点装载大量的矿石)的成本效益。业已发现,在回头弯道的间距为150m时,约80％斜坡道掘进中,连续装载优于间断装载。文章对燃油耗量和总循环时间进行了对比,并提出了成本估定。
In recent years, the trend of underground metal mining is increasing the amount of blasting (usually more than 100,000 tons per blast). The mining industry in Canada is leading the development of Vertical Backward Mining (VRM), Large Diameter Deep Hole Mining (LBH) and Cable Anchor Support to reinforce surrounding rocks and prevent dilution. In order to carry out the explosion of a large number of ore, we must study the effective shipping system. Based on a pre-defined (but typical) recovery scenario, this article illustrates the technical and economic inferences of the following shipping systems: 1. intermittent loading with scraper; 2. scraper with short body dump truck intermittent Loading; 3. Continuous loading with short body dump trucks (based on loading operation costs for AL-60 continuous loaders). According to the actual results obtained with an AL-60 continuous loader for a ramp excavation project, compared with the intermittent-load diversion (small amount) in tunneling, continuous loading will show concentrated mining (from one loading The mine is loaded with a lot of ore) cost-effective. It has been found that continuous loading is superior to intermittent loading in approximately 80% of ramp excavation at a turnaround spacing of 150m. The article compares the fuel consumption and the total cycle time, and proposes a cost estimate.