The Huolinhe surface mine is a very large-scale surface coal mine,
located in the north-east area of China with a production rate of 1.2 Mtpa.
Its coal haulage system has a large capacity, long transportation line and
high degree of automation. The system comprises two crushing plants,
many belt conveyors, four surge bunkers, one loading bunker, one coal
storage and five end product bunkers. In this paper, the network patterns of semi-continuous systems in
surface mines are studied, the reliability calculation methods and a
simulation model are established and the software for computing the
reliability of a semi-continuous system is worked out. By considering the
whole coal haulage system in the Huolinhe surface mine, the authors
developed the system reliability-numerical simulation method. The steps
and the computing results of this method are described in detail. Through the calculation, we can master the present situation of system
reliability and the main factors impairing system reliability, expose the
system weak links, put forward the ways of enhancing system reliability
and furnish the basis for improving the system and equipment. The way
of increasing capacity and methods of enhancing system reliability are
further raised.