The fundamental cause of conveyor belt slippage is insufficient friction between the conveyor belt and the drum. The specific reasons are as follows:

1. Increased operating resistance: This can be caused by overloading of the conveyor, the belt being pinched in the frame, damaged idlers, foreign objects entanglement, or coal sludge burial, which leads to a large number of idlers not rotating.
2. Reduced friction coefficient: This can occur when water or coal sludge intrudes into the contact surface between the drive drum and the conveyor belt, or when the surface rubber of the drive drum is damaged.
3. Reduced belt tension: This can be due to belt deformation and elongation, insufficient tension from the tensioning device, or damage to the tensioning device.

Prevention of Conveyor Belt Slippage:

To prevent conveyor belt slippage, efforts should be made in two aspects:

1. Enhancing operation and maintenance management: If belt slippage is detected, the machine should be stopped immediately, and the causes should be analyzed and addressed according to the reasons mentioned above.
2. Using anti-slip protection devices: If the belt is found to be loose, it should be tensioned immediately. During the tensioning process, it is strictly forbidden to manually move or use a crowbar to adjust the running tensioning car or steel wire rope. It is also prohibited to clean the adhering materials on idlers or drums with hands or any tools while the machine is running. Idlers that do not rotate smoothly should be replaced.

When replacing the conveyor belt or making a belt splice, if it is necessary to start the machine intermittently to pull the belt, operators are strictly prohibited from standing above the rotating parts. If belt misalignment occurs, it should be adjusted in a timely manner. When handling misalignment, it is strictly forbidden to grab or step on the running conveyor belt.

When stopping the machine, the coal on the conveyor belt should generally be emptied unless there are special circumstances, to avoid starting under heavy load. Frequent heavy-load starts are also strictly prohibited.

Electric Locomotive Transportation in Coal Mines:

Electric locomotive transportation in coal mine tunnels is a major form of long-distance transportation in mine roadways. It is a mechanical device that uses electric locomotives to pull a series of mine cars on tracks and is responsible for the heavy transportation tasks of coal, spoil, materials, equipment, and personnel.