Bentonite mining technical conditions

project

Claim

The minimum thickness of the layer mineral recoverable

1 to 2 m

Minimum stone thickness

Not less than 1 m

Open pit mining elevation

Generally not less than 50 m below the erosion reference plane

Open stripping ratio

Not more than 4:1

The final slope angle of the open-air deposits

Generally 50~60o

Open-pit mining final chassis minimum width

Not less than 20 m