How many methods are there for dust control on coal piles?

How many dust control methods are there for coal piles?

There are mainly four dust-proofing measures for coal piles:

1. Fully enclosed, using walls and roofs to achieve dust control.

2. Installed dust control netting for coal piles (preventing dust by reducing wind speed and direction).

3. Semi-enclosed (fenced without a roof or roofed without a fence).

4. Soft covering involves applying dust suppression on the surface of the coal pile.

The first two methods are more effective. They are commonly used for dust control on coal piles, yielding good results.