The Mine Shafts Project. Hydrology.

[The Old Ruminator]

Working at the blocked adt out flow.

 

[The Old Ruminator]

Pipes for the adit outflow.

 

[The Old Ruminator]

Late in the day. Installing a new lower adit access point.

 

[The Old Ruminator]

Adit access portal and downstream pipe connection.




To be continued as SWMBO has summoned.

 

[The Old Ruminator]

The Summer drought of 2022. W is a wet week. D is a dry week. The green line is when the adit collapsed. The lowest level seen so far at 7.20m. The main drainage adit would clear at roof level around 8m ( maybe this year ? )

 

[The Old Ruminator]

The initial part of the adit was cut and cover the latter part of which had collapsed way prior to 1950. The adit then entered a fairly stable area of hard marl which you see here as uncovered by the digger nealy seven metres down. This could be followed some 50 metres to a capped ventilation shaft following which Triassic Sandstone was encountered which after another ten metres the water issued from a roof collapse. About five cubic metres of rocks and gravel were removed from here followed by ominous rumblings. The five cubic metres removed translated to a surface collapse of the same volume bringing a speedy halt to the adit choke excavation without gaining any forward progress. It seems likely that the cut and cover restoration has helped with the outflow but any more progress upstream is unlikely nay impssible.

 

[The Old Ruminator]

The new adit access shaft installed upstream of the repaired ( piped ) collapse in the cut and cover section.

 

[The Old Ruminator]

Collapse over the cut and cover section before restoration.

 

[The Old Ruminator]

Intact cut and cover section of the adit followed by 200 year old capping then the terminal collapse now bypassed by pipe.

 

[The Old Ruminator]

Fractured capping still visible near the adit portal.

 

[The Old Ruminator]

Excavated hypogenic tunnel showing preferential horizon level with the diggers head. This tunnel follows a byrite lode.

 

[The Old Ruminator]

Hypogenic preferential horizon with limestone roof and debris fill. Its not known if this was under water before the adit was driven but it seems likely.

 

[The Old Ruminator]

Porifera ( about 2cm ) exposed by htpogenic solution at the preferential horizon.

 

[The Old Ruminator]

Constructing the platform in the wet shaft.

 

[The Old Ruminator]

Constructing the intermediate platform in the wet shaft during a dry phase.

 

[The Old Ruminator]

Our novel way of digging in the alcove.

 

[The Old Ruminator]

Earlier work on the wet shaft platform. Note hole in the cap.

 

[The Old Ruminator]

As above.

 

[The Old Ruminator]

Modified c lamps for the ladder attachment.

 

[The Old Ruminator]

Working it out at home.