设备投资问题是企业活动最重要的问题之一。对露天采矿部门来说,在购买或更新大型采掘设备时,要考虑该设备的价格和使用期中的费用问题。选择在整个使用期内,单位时间所需费用最少的设备,这种选择方法也许可以说更合理。关于这个问题,利用一个石灰石矿的大型采掘设备(自卸汽车,轮胎式装载机)的使用资料进行研究,求其更新期、检修期和检修次数的最佳值。该矿使用50吨自卸汽车:DT-A型9 Equipment investment is one of the most important issues in business activities. For the open pit mining sector, consideration should be given to the price and cost of the equipment during the purchase or renewal of large-scale mining equipment. Choosing a device that costs the least amount of money per unit of time over its lifetime can be a more reasonable choice. In this regard, the use of a large limestone mining equipment (dump trucks, wheel loaders) to study the use of information, and its update, overhaul and overhaul the best value. The mine uses 50 ton dump truck: DT-A type 9