Definitions concerning mineral extraction (Chapter 5.18.)

1 “dry mineral extraction below groundwater level”: a dry mineral extraction where there is a water-bearing layer above the layer to be extracted, or where there is a water-bearing layer below the layer to be extracted of which the height of rise comes out above the bottom of the layer to be extracted, regardless of whether there is any run-out of water from the slopes;

2 “breach profile”: a profile with the following gradients:

a)

from a depth of 0 to 5 m: gradient 1:2

b)

from a depth of 5 to 10 m: gradient 1:3

c)

from a depth of 10 to 20 m: gradient 1:4

d)

from a depth of 20 to 30 m: gradient 1:8

e)

from a depth of 30 to 40 m: gradient 1:15

f)

from a depth of 40 to 50 m: gradient 1:25