Coal Mining Subsidence· Page 2 · AditNow Community

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Morlock
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15 years ago

#21

There are many areas of subsidence due to salt extraction around Cheshire.
They dissovled out the salt from a bed 8 feet thick, many interesting buildings about in the Lion Salt Works area. 🙂

JR
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15 years ago

#22

"Morlock" wrote:
There are many areas of subsidence due to salt extraction around Cheshire.
They dissovled out the salt from a bed 8 feet thick, many interesting buildings about in the Lion Salt Works area. 🙂 /quote]

It had skipped my memory but you see the same sight of buildings leaning on each other for support around Droitwich, Worcestershire for the same reason.
sleep is a caffeine deficiency.

Morlock
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15 years ago

#23

Yes, I'd forgotten about that area as well.

patch
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15 years ago

#24

It's not just houses and buildings that are affected. Several years ago British Gypsum had to fork out to have a three quarter mile new road built because the road from the A6 to Cotehill near Carlisle was in danger of dropping into the old Cocklakes Gypsum Mine. Although Cocklakes had been closed for a long time, they were still liable for the cost of the new road.
The upside of subsidence of this mine is that it has provided several "new" lakes which have been utilised by anglers. I image it's the same with salt extraction in Cheshire.

Don't wait for a light to appear at the end of the tunnel, stride down there and light the damn thing yourself

Cat_Bones
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15 years ago

#25

Holes open up round Telford fairly regularly as a result of the old coal workings. There's a road a couple of miles from me that was closed for ages because of the hole that opened up in the middle of it. There's some pics on ME of some workings which were temporarily accessible a while ago when a hole appeared in a field. Supposedly, smoke can be seen from time to time in that area due to the old workings a few feet under the surface spontaneously catching fire. All the workings will probably get destroyed by open-casting due to take place soon.
There's a lot of subsidence in the Ironbridge area too although I think this is mainly due to geology rather than the extensive mining. There's one or 2 very wonky houses that have been twisted around over the years. There's also at least one shaft that looks like it's sheared off part way down where the sides of the valley have slid down-hill!

Morlock
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15 years ago

#26

"Cat_Bones" wrote:
All the workings will probably get destroyed by open-casting due to take place soon.

When they open-casted the area of Parc Slip Colliery it was interesting to see the old galleries which had not been seen for many years. 🙂

Cat_Bones
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15 years ago

#27

"Morlock" wrote:

"Cat_Bones" wrote:
All the workings will probably get destroyed by open-casting due to take place soon.

When they open-casted the area of Parc Slip Colliery it was interesting to see the old galleries which had not been seen for many years. 🙂

Would be cool to see stuff like that but also a bit gutting, knowing you'll never get to explore them!

Morlock
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15 years ago

#28

"Cat_Bones" wrote:

"Morlock" wrote:

"Cat_Bones" wrote:
All the workings will probably get destroyed by open-casting due to take place soon.

When they open-casted the area of Parc Slip Colliery it was interesting to see the old galleries which had not been seen for many years. 🙂

Would be cool to see stuff like that but also a bit gutting, knowing you'll never get to explore them!

Exploration was not possible in this case as the mine was flooded to within 10-15 feet of the surface, it was only accessible later due to the pumping carried out as the opencast deepened.

http://en.wikipedia.org/wiki/Park_Slip_colliery

Ty Gwyn
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15 years ago

#29

A few years back,there was a degree of subsidance on the M6 near Coventry,due to Daw Mill workings.

Graigfawr
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15 years ago

#30

A geotechnical study in the late 1980s concluded that the central portion of the south Wales coalfield had decreased in altitude by about 6m due to coal seam extraction. This was not localised subsidence but the decrease in altitude above sea level of hundreds of square miles. Presumably other major coalfields which have experienced substantially complete extraction of multiple seams are likely to have experienced similar decreases in altitude.

carnkie
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15 years ago

#31

Came across this quite interesting photo taken 1978.

Coal Mine Subsidence near Sheridan, Wyoming. Surface subsidence effects above abandoned coal mines 10 to 15 kilometers north of Sheridan. Subsidence depressions and pits above the Old Monarch Mine in operation from 1904 to 1921. Rectangular depressions, some of which are bounded by pits, are evident on the right. Some of the pits are sealed at the bottom and provide sufficient moisture to support trees (foreground).
🔗Personal-Album-272-Image-44742[linkphoto]Personal-Album-272-Image-44742[/linkphoto][/link]

The past is a foreign country: they do things differently there.

ICLOK
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15 years ago

#32

Thems big termites... fascinating pic CK :thumbup:

Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!

tomh
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15 years ago

#33

My friends dad used to live in a cottage at frogpool near united downs when it was working and he said you could hear the carts going along the rails beneath the cottage

derrickman
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15 years ago

#34

"Cat_Bones" wrote:

"Morlock" wrote:

"Cat_Bones" wrote:
All the workings will probably get destroyed by open-casting due to take place soon.

When they open-casted the area of Parc Slip Colliery it was interesting to see the old galleries which had not been seen for many years. 🙂

Would be cool to see stuff like that but also a bit gutting, knowing you'll never get to explore them!

gas and bad air constraints still apply...

there is settlement of 4-5m around M1 J29 from historic coal mine workings, mostly relatively shallow drift mining at Doe Lea

I worked on a tunnel project in Mansfield for a short while in the early 90s and found settlement of 2-3m in places, levelling around the OS TBMs. This was well known locally, in general terms although not in detail

''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.

ICLOK
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Newbie Topic Starter

15 years ago

#35

The biggest coal mining subsidence I remember in the Erewash Vally was between Langley Mill and Stoneyford on the 4 track mainline. You used to be able to look all the way up to SF and see the 4 tracks go over the top of the gradient summit about a mile away, got down their one day (late 70s) and a second artifial summit had appeared, so instead of a continuous grade the line now went up then level then up... you can still see the huge amounts of ballast used to semi correct it... the line dropped afew feet in about 5 days... you can still see the gradient change to this day. Then in same area 2-3 years ago a shaft opened up next to the line closing it again ....!

Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!

Cerne
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15 years ago

#36

More than a few subsidence problems on the railways. Always rather liked this one, only steam engine to get a decent burial: [http://lindal-in-furness.co.uk/Heritage/lindalhole.htm]

JohnnearCfon
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15 years ago

#37

"Cerne" wrote:
More than a few subsidence problems on the railways. Always rather liked this one, only steam engine to get a decent burial: [http://lindal-in-furness.co.uk/Heritage/lindalhole.htm ]

Interesting photos and article. Looking at the fourth photo it would appear that some of the sidings were laid with "baulk road".

ICLOK
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15 years ago

#38

Cerne, that was fascinating stuff thanks... I've saved that as its the type of thing I put into talks. :thumbsup:

Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!

derrickman
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15 years ago

#39

is this the incident referred to in the 'Thomas the Tank Engine' story?

a propos 'baulk construction', isn't this particularly associated with Brunel's 7ft gauge designs?... getting further off topic, I didn't realise until quite recently that many early US railroads were constructed to broad gauges between 5ft and 6ft

''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.

JohnnearCfon
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15 years ago

#40

"derrickman" wrote:

a propos 'baulk construction', isn't this particularly associated with Brunel's 7ft gauge designs?...

This was discussed on another thread recently (the Butterley thread).