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当具体生产条件要求使用电铲和自卸汽车进行矿岩装运时,则须确定所用设备的型式和数量。电铲和汽车型式的选择是比较简单的,可根据了解到的需要产量、运输道路纵断面、工作面高度、设备的费用和可靠性、以及工程承包公司处这类设备的可用性来选择。然而,要确定与某一台装载设备配合使用的汽车台数就不十分容易了。如果汽车装载时间为t_1,一个循环中其余作业所需的时间为t_2,则所需汽车的理论台数是(t_1+t_2)/t_1;但如果取用实际数字(由众所周知的任一方
When specific production conditions require the use of electric shovels and dump trucks for ore shipment, the type and quantity of equipment used must be determined. The choice of shovel and car type is relatively straightforward and can be based on knowledge of the required yield, the longitudinal section of the road, the height of the work surface, the cost and reliability of the equipment, and the availability of such equipment at the engineering contractor. However, it is not easy to determine the number of cars to be used with a piece of loading equipment. If the vehicle loading time is t_1 and the time required for the rest of the operations in a cycle is t_2, the theoretical number of vehicles required is (t_1 + t_2) / t_1; however, if we take the actual number (by any of the well-known parties