However, due to poor working conditions for mine belt conveyor, the uneven load distribution, load fluctuation features, it has its particularity in the process of using and maintenance.

The latitudinal fluctuation started at east of the subtropical high belt over the mid-Pacific, propagated westward gradually.

Two parallel permanent fluctuating belt will be formed along the two Banks of the reservoir because of the natural fluctuation of water level after the finish of the Three Gorges Dam.