考虑阻塞时破碎站的整体运行特性研究

Study on Properties of Crusher Station in Case of Blockage

露天矿的半连续运输系统中,破碎站处的阻塞、排队对整个系统的运行效率有重要影响。应用排队论中的排队网络分析方法建立了破碎站的有阻塞排队网络模型,用随机模拟得到破碎站卸载平台上的队长和等待队长、破碎站实际处理的物料量、卸车位受阻塞的累计时间与总工作时间的比值、破碎站处于空闲状态的累计时间与总的工作时间的比值等指标与汽车的到达率之间的关系曲线,揭示了破碎站的排队网络中各个参数变化对整个系统运行特性的影响,得出了一系列描述破碎站整体运行特性方程和曲线。研究方法与结果对于破碎站能力、料仓容积、汽车数量之间的最优配置,有重要应用价值。

In the semi-continuous transport ssystem of open pit mining, the blockage and queuing at the crusher station have an important effect on the integral system operation efficiency. A network model for the crusher station in case of blockage and queuing is established using the queuing network analysis method. Random simulation is used to get a set of curves describing the relation between the following indexes and the truck arrival rate, such as the queue length at the unloading platform and the length of the waiting queue, the real throughput of the crusher station, the ratio of the accumulated time of the blockage at the unloading site to the total operation time, and the ratio of the accumulated idle time to the operation time of the crusher station. The effect of the variation of the parameters in the queuing network of the crusher station on the operation characteristics of the whole system is revealed and a series of equations and curves describing the integral operation characteristics of the crusher station are obtained. The study method and results are of great application value to the best configuration of the capacity, bin volume and truck number of the crusher station.