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Post by tygwyn on Jan 26, 2014 14:03:00 GMT -5
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Post by John on Jan 26, 2014 14:46:23 GMT -5
Pit bottom is supposed to be bricked or concreted up to form a good seal and support the weight of the infill. Then they are suppsed to use sand and gravel for so many feet, then crushed hardcore, finally the shaft has to be undercut and a concrete cap cast of so many feet thick, then the shaft topped up with crushed hardcore.
Over the last few years it's been obvious this procedure hasn't been adhered to with the amount of shaft slumps around the UK.
If pit bottom isn't sealed, water will cause the shaft infill to slump...
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Post by spanker on Jan 26, 2014 15:01:11 GMT -5
I can bare witness to the incorrect filling of shaft such as our old pit Ireland Colliery in Derbyshire, around 92 I took an old colliery deputy through from Markham and there were no such walls just hardcore which had flowed about 4 meters into the pit bottom roadway at it,s base.
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Post by John on Jan 26, 2014 15:12:12 GMT -5
I can bare witness to the incorrect filling of shaft such as our old pit Ireland Colliery in Derbyshire, around 92 I took an old colliery deputy through from Markham and there were no such walls just hardcore which had flowed about 4 meters into the pit bottom roadway at it,s base.
I dread to think what will happen around Clifton Colliery Nottingham should it not have been filled and capped to engineered standards...There's a pork pie factory sitting atop of both shafts!
Same with Wollaton and Radford, houses over them, then Hucknall No2, it has a supermarket on top of the shafts and car park over the rest of the shafts, houses over the top of Hucknall No1...Linby would have an industrial estate, don't know about Annesley, Newstead etc....
Sounds like some nasty things will be happening in the future..
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Post by tygwyn on Jan 26, 2014 15:16:28 GMT -5
Supposed and Done ,that is the question,
Just noticed again on Aditnow,a link to a thread on here back in 2011,and noticed your post Spanker,
A lot of South Wales pits just had the muck tip reverted and any other rubbish on the surface cleared,they may have got better later on,i know Abernant had limestone trucked in from the quarry at Llandybie for ages,1,000`s of tons i imagine.
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Post by spanker on Jan 26, 2014 15:30:29 GMT -5
We can only imagine what will occur when they start tracking in these areas? Also if they had not walled up and stripped away materials in the pit bottom then as John says in earlier post .Then this did not happen in the various insets did it!
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Post by spanker on Jan 26, 2014 15:31:07 GMT -5
Sorry Fracking
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Post by Wheldale on Jan 26, 2014 16:13:26 GMT -5
Theres a picture here I found on Facebook. Donisthorpe No.2 shaft.  |
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Post by cortonwood on Jan 27, 2014 14:18:58 GMT -5
 shaft capping at barnburgh colliery in south yorkshire |
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Post by John on Jan 27, 2014 14:35:52 GMT -5
What's all the thick brick walls for around that shaft area?? |
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Post by cortonwood on Jan 27, 2014 15:03:28 GMT -5
that was the upcast shaft,the brick walls are the structure of the air lock and the lower level pit bank.if you look at the picture the top of the cap is in line with the actual ground level.
i'll post some more pics if I can get some.
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Post by cortonwood on Jan 27, 2014 15:14:44 GMT -5
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Post by cortonwood on Jan 27, 2014 15:15:54 GMT -5
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Post by cortonwood on Jan 27, 2014 15:46:36 GMT -5
 the upcast shaft had previously been filled with chippings to below the meltonfield level after a fire had started due to spontaneous combustion in the old pit bottom at the parkgate/thorncliffe level. they ran pipes down the shaft which were fed by the panzer in the pit yard,the noise in the pit bottom was unbearable.As we rode the shaft you could see the pipes glowing from the friction. |
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Post by John on Jan 27, 2014 16:15:40 GMT -5
Pretty deep shafts! The one thing you had that the Nottingham coalfield didn't have, was the upper measures, the Barnsley Bed was pretty close to the surface just to the west of Nottingham and probably outcropped near where the M1 is now, better known to us as the Top Hard seam.
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Post by cortonwood on Jan 28, 2014 12:56:26 GMT -5
at barnburgh we were working the newhill and meltonfield seams,both above the Barnsley bed.The Barnsley had been worked out years ago.
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Post by John on Jan 28, 2014 14:33:08 GMT -5
at barnburgh we were working the newhill and meltonfield seams,both above the Barnsley bed.The Barnsley had been worked out years ago. Yep, you had all the top coal measures, as you got to the outcrop near the Notts Derbyshire border, even some of the middle measure seams were missing. Lots of Derbyshire seams were the lower middle coal measures and further south you went, lower measure seams only. No idea where the Leicestershire seams fitted in or the very southern Derbyshire seams. |
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