Charnwood Grosvenor - Manual (Page 8)

Fig. 4. Coal Layer 2 Natural Gas
1st Layer below shown dotted
11 12 13 14
15 16 17
18 19 20 21
L L L L
L L L
L L L L
ø8.0 Holes
Air Tunnel Air Tunnel
1
2
3
4 5
6 7 8 9 10
Fig. 3. Coal Layer 1 Natural Gas
Air Tunnel
S S S S S
L
L
L
L
L
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