I can provide you with some basic knowledge on how to maintain coal mine conveyor belts. Conveyor belts play a crucial role in the coal mining industry, and proper maintenance is essential to ensure their smooth operation and prolong their lifespan. Here are some common practices for maintaining coal mine conveyor belts:

1. Regular Cleaning: Regularly clean the conveyor belt to remove dust, dirt, and debris. Use appropriate cleaning tools such as brushes or high-pressure water jets. Keeping the belt clean prevents the buildup of materials that can damage the belt surface and reduces wear on rollers, pulleys, and the drive system.

2. Lubrication: Periodically lubricate conveyor belt rollers and pulleys as per the manufacturer's recommendations. Use lubricants suitable for mining environments to ensure they do not cause any harm to the belt.

3. Check Belt Tension: Regularly check and adjust the tension of the conveyor belt to ensure it is properly tensioned. Too loose or too tight belts can impact the belt's performance and lifespan.

4. Inspect Belt Connectors: Regularly inspect the conveyor belt connectors such as belt splices, mechanical fasteners, etc. Ensure they are secure and intact to prevent any breakage or detachment.

5. Inspect and Replace Damaged Parts: Periodically inspect key components of the conveyor belt, such as skirt boards, support structures, idlers, etc. If any damage or wear is found, promptly repair or replace them to prevent further damage.

6. Regularly Check Belt Alignment: Belt misalignment can cause wear and damage to the conveyor belt while also increasing energy consumption. Regularly inspect the alignment of the belt and make necessary adjustments or corrections.

It is important to note that these are basic practices for maintaining coal mine conveyor belts. The actual maintenance procedures may vary based on specific circumstances. For more detailed and professional guidance, it is advised to consult coal mining machinery manufacturers or relevant industry experts.