The paper introduces the working principle and the choice of main parameters of the air cushion belt conveyor with pressure relieve side-seal developed by CCRI Hefei Branch.

This paper introduces main features and applicability of the new generation of crawler trackless loading device,ZMC-30 full hydraulic side-dump coal-loader,expounds in detail the application of this machine in Datong Coal Mine Group,and puts forward some suggestions connecting with the actual situation.

The reinforcing rails of the bottom structure in dumping station for side bottom dumping cars occasionally drop off during operation in many mines.