Identify the stability classification of the surrounding rock through BP neural network in the mine tunnel;

According to the virtual connection phenomenon caused by easy escape of plug-in protection electronics in the box under coal mine, which makes switch fail to work, this paper analyzes theoretically the position of plug-in electronics and provides methods to increase the stability of plug-in electronics and reliable measures to ensure the working of switch.

The effect on track of the deployed number of concrete sleepers within per kilometer are calculated and analyzed in detail based on the track strength theories(including static and dynamic) and the track stability theory, thus to find the theoretical base for the decrease of the deployed number of type Ⅲ concrete sleepers per kilometer.