砂矿开采,特别是砂金矿开采,扩大了液压挖掘机(包括小型矿用小型挖掘机)的应用范围。柴油液压挖掘机每千瓦发动机的投资费约为1400～1700美元,每米~3铲斗所需功率约为80～150千瓦。挖掘机的生产能力,很大程度上取决于物料类型。开采砂砾层时,以每小时60分钟作业和满斗系数为1计,挖掘机的最大生产能力为130～140米~3/小时。开 Sand mining, particularly gold and gold mining, has expanded the range of applications for hydraulic excavators, including small mining mini excavators. Diesel hydraulic excavator investment cost per kilowatt engine is about 1400 ~ 1700 US dollars per meter ~ 3 bucket power required about 80 ~ 150 kilowatts. Excavator production capacity, largely depends on the type of material. Gravel mining layer, the hourly 60-minute operation and full bucket factor of 1 meter, excavator maximum production capacity of 130 to 140 m 3 / hour. open