Abstract: 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.

Key words: Crusher station, Blockage, Queuing network, Simulation