DISCO DAVE'S TUNNEL GUIDE
Angle of descent
As everyone is different (they haven't started cloning tunnellers yet). People vary as to how long and at what speed they are willing to work. Some work for two hours at a rapid pace then call it a day. Others spend all day underground. When you dig you may encounter a large lump of rock or stone that despite your best efforts isn't going to break. Go round it and possibly incorporate in to the defences ie as part of a concrete door frame . You will dig downward naturally. The further down the more the soil will become more compact and stable with less danger of subsidence which in turn will mean less shoring. It will be easier to pull out bags of soil if the gradient is shallow. Also a long steep downward tunnel (ie 12 to 15 feet long) will be easy to get into but difficult to get out of. A rope with knots tied at intervals in the centre of the tunnel is a useful addition.
The steep slope will also make possible shoring difficult but that will also be the case for the bailiff who will have to enlarge to tunnel to create what they call a "safe working area".
Phase 2 Shoring the down shaft
Phase 5 Constructing and erecting Shoring
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