对于地下开采的矿山,矿井排水的经营费用占矿石生产成本的比例较大。据估计,矿井排水用电量约占矿山耗电量的20～27%左右,因此,努力降低矿井排水用电有着重要的经济意义。水泵的工况取决于它本身的性能和它所在的管路性能,改变其中任一因素,水泵工况就会发生变化。排水系统的耗电不但取决于水泵工 For underground mining mines, mine drainage operating costs accounted for a larger proportion of ore production costs. It is estimated that mine drainage electricity consumption accounts for about 20 ~ 27% of mine electricity consumption, therefore, efforts to reduce mine drainage electricity has an important economic significance. The working condition of the pump depends on its own performance and the performance of the pipe in which it is located. Any change of one of the factors will cause the pump’s working conditions to change. The drainage system’s power consumption depends not only on the pump workers