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Posts by derrickman

Showing 1334 results below:

Author Message
Topic: Book Con!
derrickman

Forum: General Chat   Posted: 23/07/2010 20:46:42   Subject: Book Con!
or selling it to the next mug / optimist / enthusiast / non-member of this forum ( delete as not applicable )...
Topic: Maypoling
derrickman

Forum: Exploration Chat   Posted: 23/07/2010 15:49:26   Subject: Maypoling
main problem I remember, with caves at least, is getting a secure footing. Water-worn, sloping limestone isn't great for that
Topic: Maypoling
derrickman

Forum: Exploration Chat   Posted: 23/07/2010 14:24:55   Subject: Maypoling
that's much how I remmber the 4C's ( Cambridge Caving and Climbing Club ) using a maypole in the early 70s. The solution to the CoG problem is that either you use it in a raise, as shown in the pics,
Topic: Explosives
derrickman

Forum: General Chat   Posted: 23/07/2010 10:37:45   Subject: Explosives
http://www.epc-groupe.co.uk/home-explosives.html

you may find that minimum quantity was a problem for small mines.
Topic: Book Con!
derrickman

Forum: General Chat   Posted: 23/07/2010 03:32:17   Subject: Book Con!
I've seen obsolete and third-party technical literature repackaged in this fashion. It's a particular problem with enthusiast vehicles such as Jeep which combine high OEM costs, deliberate obstruction
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 17/06/2010 16:36:41   Subject: English Heritage draft consultation.
generally speaking, I'm too far removed from the centre of things to be directly involved with them, and quite happy to stay there.

My experience of them tends to involve monitoring structu
Topic: BOSWIN Mixed Mine
derrickman

Forum: South West England   Posted: 17/06/2010 13:01:56   Subject: BOSWIN Mixed Mine
when I was a student I lived at a house called Higher Boswyn, not so far from there; there was an older house called Boswyn, Higher Boswyn and various agricultural buildings.

I never realis
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 19:49:00   Subject: English Heritage draft consultation.
I'm not saying EH don't do anything, because they do.

Whether they do it in a cost-effective manner, I would be open to anyone who has some real figures to demonstrate.

The new
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 17:41:35   Subject: English Heritage draft consultation.
??

as far as I can see, EH appear to have few friends among those who deal with them professionally, in terms of their supposed function.

The suggestion that they might otherwis
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 16:44:12   Subject: English Heritage draft consultation.
I'd have to agree with that.

their attitudes and actions at Rotherhithe Tunnel were high-handed in the extreme. They had the actual affect of greatly increasing the timetable and cost of th
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 15:27:39   Subject: English Heritage draft consultation.
I'd say your second paragraph sums the situation up quite well.

Their budget will undoubtedly be squeezed in coming months and years, and they will not have the time or resources to expand
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 14:51:29   Subject: English Heritage draft consultation.
I don't wish top appear to be completely negative about them, but my honest opinion of EH is that they would be best employed doing what they do best, which is designing and commissioning high-profile
Topic: Yn Kernow
derrickman

Forum: South West England   Posted: 16/06/2010 14:43:41   Subject: Yn Kernow
last time I was there, in December, I parked at the South Wheal Frances site near Stitihians and walked part of the Flat Lode Trail.

Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 16/06/2010 10:13:01   Subject: English Heritage draft consultation.
my experience of EH is that they are often interested to an unhealthy degree, in empire building and excluding third parties they don't control.

They are essentially beaurocrats, with a str
Topic: NAMHO 2010 Conference
derrickman

Forum: General Chat   Posted: 10/06/2010 21:26:21   Subject: NAMHO 2010 Conference
I was much more impressed with the later work, the detail on the image was vastly improved over the early work that the fly-through was generated from ... but that's my field, I suppose
Topic: NAMHO 2010 Conference
derrickman

Forum: General Chat   Posted: 09/06/2010 23:59:27   Subject: NAMHO 2010 Conference
did they show you the 3D scanning fly-through from Combe Down then?

i didn't realise the one-time scale of the Somerset coalfields
Topic: St Just Area First Time Mine Exploring
derrickman

Forum: South West England   Posted: 09/06/2010 13:59:29   Subject: St Just Area First Time Mine Exploring
doesn't one of those tidal adits at Botallack connect with Allen's Shaft? ;(
Topic: West Somerset iron ore mining
derrickman

Forum: South West England   Posted: 08/06/2010 19:49:47   Subject: West Somerset iron ore mining
http://www.westsomersetmineralrailway.org.uk/welcome/a-short-history/
Topic: Lubricating karabiners?
derrickman

Forum: SRT Equipment & Training   Posted: 07/06/2010 08:41:42   Subject: Lubricating karabiners?
I have a couple of steel krabs which are around 30 years old, hanging on my lamp-belt for spanners etc. I've never done anything except wash them in running water occasionally.

regular hand
Topic: faces from the past..
derrickman

Forum: South West England   Posted: 06/06/2010 19:39:09   Subject: faces from the past..
[url]http://min-eng.blogspot.com/2010/06/regeneration-of-robinsons-shaft-south.html[/url]

I can't log onto this because I don't have a google email account, but it's good to see some old fa
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 05/06/2010 09:16:45   Subject: English Heritage draft consultation.
I'm afraid my experiences of EH at the Brunel Thames Tunnel soured me on them rather. They held the job up for months, cost various third parties very large sums of ( tax-payers and commuters ) money
Topic: English Heritage draft consultation.
derrickman

Forum: Mining Heritage   Posted: 04/06/2010 09:23:16   Subject: English Heritage draft consultation.
I have to admit that my past experience of EH, especially at the Brunel Tunnel Refurbishment, has been pretty alarming in terms of generating enormous expense for third parties.
Topic: Croesor and Rhosydd trips - 3rd July
derrickman

Forum: Events   Posted: 30/05/2010 06:42:26   Subject: Croesor and Rhosydd trips - 3rd July
I'm currently at sea and things are a bit unpredictable right now, but I'm interested if circumstances permit.
Topic: Air quality vs pressure thoughts
derrickman

Forum: South East England   Posted: 25/05/2010 05:49:09   Subject: Air quality vs pressure thoughts
even quite small local variations can be significant.

This could be clearly seen at Combe Down, a large system ( about 45 acres at its maximum extent ) at a single horizon. The multiple en
Topic: Pathe News
derrickman

Forum: General Chat   Posted: 24/05/2010 19:11:55   Subject: Pathe News
interesting to see that although the film is dated 1966 ( and the electric lamps and donkey jackets would be correct for the period ) one miner still wears a Theford-type hard hat, while the onsetter
Topic: sixteen tons...
derrickman

Forum: General Chat   Posted: 23/05/2010 16:59:45   Subject: sixteen tons...
http://www.youtube.com/watch?v=MiZU2IbDrXU&feature=related
Topic: Whale Sough and Hubberdale mine walk this Sunday
derrickman

Forum: Midlands   Posted: 21/05/2010 21:50:47   Subject: Whale Sough and Hubberdale mine walk this Sunday
if [i]you[/i] rate it as "wet" it must be pretty grim....
Topic: Youds Level Lead Mine
derrickman

Forum: Midlands   Posted: 21/05/2010 05:49:07   Subject: Youds Level Lead Mine
something of a digression, but the Combe Down project included an entry in someone's back garden which had the masonry re-set and repointed and a grille and ladder installed ( this was in the Byfields
Topic: Mining News Roundup
derrickman

Forum: General Chat   Posted: 08/05/2010 07:55:10   Subject: Mining News Roundup
Murphy Tunnelling have made serious money over the years, selling virgin London clay in bulk as structural fill and capping material. The M25 took imported fill from the main interceptor sewer renewal
Topic: trip to Ecton?
derrickman

Forum: Midlands   Posted: 03/05/2010 21:08:45   Subject: trip to Ecton?
just been looking in the albums, interested in those pics at Ecto with the deep water-filled shaft

any chance of a trip there?
Topic: Worrying Shaft Incident.
derrickman

Forum: Scotland   Posted: 03/05/2010 01:51:57   Subject: Worrying Shaft Incident.
the crucial problem is that we have somehow acquired a culture of risk aversion, operated by a management layer with no actual experience of the process they are supposedly managing.

these
Topic: Wheal Martyn
derrickman

Forum: South West England   Posted: 29/04/2010 22:06:47   Subject: Wheal Martyn
I saw the drawings for the £2.7m extension at NCMM while i was at Combe Down - serious stuff.

the surface galleries at Big Pit are good, yes.

Geevor's underground section reall
Topic: Wheal Martyn
derrickman

Forum: South West England   Posted: 29/04/2010 20:23:32   Subject: Wheal Martyn
my feeling would be that Geevor lacks movement.

If you could go into the mill, and see some part of the process actually working, that would be great; it's a unique installation,l after all
Topic: Wheal Roots/ Poldark Mining Ltd
derrickman

Forum: South West England   Posted: 29/04/2010 19:00:58   Subject: Wheal Roots/ Poldark Mining Ltd
Cornwall is well supplied with tourist attractions named for half-forgotten tv series... "Flambards" is another

I did actually see a brief snatch of Poldark on one of the more obscure dayti
Topic: Wheal Martyn
derrickman

Forum: South West England   Posted: 29/04/2010 14:01:24   Subject: Wheal Martyn
I like Geevor, it has that feeling of being really how it was... the bare, manky, smelly 'dry' with red snot and old welly boots everywhere, the vast expanse of unintelligible clutter in the mill, eve
Topic: How the ground was broken
derrickman

Forum: South West England   Posted: 27/04/2010 18:06:18   Subject: How the ground was broken
"round and round went the bloody great wheel"... that seems to be an auger type rotary drill, the sort of thing that would work well in relatively soft ironstone

I'd be curious to know if t
Topic: gt orme cu mines
derrickman

Forum: North Wales   Posted: 27/04/2010 15:21:59   Subject: gt orme cu mines
saw this on tv a short while ago, bronze age workings seem to be extensive if very tight in places
Topic: Morwellham Quay saved from closure
derrickman

Forum: South West England   Posted: 26/04/2010 11:05:30   Subject: Morwellham Quay saved from closure
I didn't realise that Charlie Daniels was a driver on the Tal-y-Llyn!
Topic: Morwellham Quay saved from closure
derrickman

Forum: South West England   Posted: 25/04/2010 13:51:20   Subject: Morwellham Quay saved from closure
I was in Cornwall at Easter and passed a sign to Morwellham, I did wonder how things were panning out there

I last visited the place sometime in the mid-90s when it seemed to be a very ambi
Topic: Moel Fferna shaft - depth?
derrickman

Forum: North Wales   Posted: 16/04/2010 16:41:28   Subject: Moel Fferna shaft - depth?
[quote="martymarty"]ok so we all made a sterling effort :offtopic: :stupid: [/quote]

sterling effort? I've just negotiated a dayrate in Euros for my next trip....
Topic: Mineral Rights holders
derrickman

Forum: General Chat   Posted: 15/04/2010 07:04:22   Subject: Mineral Rights holders
there were a few 'free miners' among the workforce at Combe Down, one of them explained some of this to me, although you really needed to know the area ( which I don't ) to understand the explanation
Topic: eimco....
derrickman

Forum: South Wales   Posted: 14/04/2010 14:56:36   Subject: eimco....
the hole in the upper centre of the sidesheets is for putting a bar through to hold the bucket in the raised position for maintenance - that may not be their original purpose but it was a common use!<
Topic: eimco....
derrickman

Forum: South Wales   Posted: 14/04/2010 07:07:40   Subject: eimco....
the area inside the side sheets tends to collect compacted fines and debris, and the operator has to clean this out occasionally.

I remember the fitter making a hook from a length of rebar
Topic: Irthlingborough (Ebbw Vale) Iron Mine
derrickman

Forum: Midlands   Posted: 13/04/2010 11:35:04   Subject: Irthlingborough (Ebbw Vale) Iron Mine
my best understanding is that the ironstone workings in Northants were open pit and have been put to the usual uses - landfill followed by building or agriculture

I don't believe there are
Topic: Eimco is reborn
derrickman

Forum: General Chat   Posted: 12/04/2010 20:31:12   Subject: Eimco is reborn
how much and when for the model?
Topic: Black powder blasting any info?
derrickman

Forum: South West England   Posted: 09/04/2010 08:31:25   Subject: Black powder blasting any info?
what TamarMole said.

boulder chokes especially, tend to move under their own weight and internal structure. The choke in Dow Cave, now blocked entirely, was a classic example.

S
Topic: Black powder blasting any info?
derrickman

Forum: South West England   Posted: 08/04/2010 08:02:45   Subject: Black powder blasting any info?
personally I would tend to feel that for the kind of small-scale, controlled splitting of boulders for specimens being suggested, it would be better to use drilling and splitting using plug and feathe
Topic: Black powder blasting any info?
derrickman

Forum: South West England   Posted: 07/04/2010 21:58:33   Subject: Black powder blasting any info?
black powder holes would normally be quite short, maybe 2ft or 3ft, look at the photos of hand-drillers and you will see the length of the steels they are using.

Topic: A wander around Cwmorthin
derrickman

Forum: North Wales   Posted: 06/04/2010 17:02:06   Subject: A wander around Cwmorthin
definitely a model..

http://forum.gn15.info/viewtopic.php?t=2779
Topic: 153 miners trapped in Chineese coal mine
derrickman

Forum: General Chat   Posted: 05/04/2010 08:30:55   Subject: 153 miners trapped in Chineese coal mine
looking at the various news coverage of this, the numbers seem to vary considerably.

If I were a cynical soul, which heaven forfend, I'd suspect that there are still some numbers trapped b
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