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Posts by derrickman

Showing 1334 results below:

Author Message
Topic: Caving-Gear Raptor Pro LED Caving Caplamp
derrickman

Forum: General Chat   Posted: 11/12/2010 18:03:12   Subject: Caving-Gear Raptor Pro LED Caving Caplamp
I have one of the original Raptors and it has served me well at a budget price. Not the brightest and the beam is tighter than I would wish, but quite sufficient for the purpose.
Topic: Miners Tools.
derrickman

Forum: Mining Methods & Techniques   Posted: 10/12/2010 13:54:36   Subject: Miners Tools.
there were several in the stores at Combe Down. One of the miners used one for chipping pockets for setting the stemple for the core drill, knocking in wedges and general uses.

I've also s
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 26/11/2010 15:50:27   Subject: Securing abandoned mines against entry
all due respect to CIRIA, but there is a body of legislation called MASHAM which covers all of this. There are people who know all about it, they are called mining professionals.

They aren
Topic: Mapping software - any suggestions?
derrickman

Forum: General Chat   Posted: 23/11/2010 21:29:11   Subject: Mapping software - any suggestions?
I use a combination of Google Earth and Memory Map, plus a fair amount of 'best fit' and that works fine for me. I've done 200km pipeline routes on Google Earth, and some quite intricate best-fit solu
Topic: Explosion in New Zealand coal mine
derrickman

Forum: Australasia   Posted: 22/11/2010 04:57:56   Subject: Explosion in New Zealand coal mine
risk vs benefit is very much the issue. I was involved in a fire in a tunnel back in the late 80s, we actually put more men in than the fire brigade to stop the fire brigade blokes hurting themselves
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 22/11/2010 04:35:09   Subject: Securing abandoned mines against entry
getting to Cornwall is easy, straight down the A303.. I suspect you actually mean studying full-time while balancing domestic commitments, which is rather harder.

I spent some years in civi
Topic: Explosion in New Zealand coal mine
derrickman

Forum: Australasia   Posted: 21/11/2010 09:08:35   Subject: Explosion in New Zealand coal mine
I'd suggest at this point, that anyone with no professional experience and/or actual information of the situation there, keep their speculation and opinions to themselves....
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 21/11/2010 07:49:46   Subject: Securing abandoned mines against entry
again, quite a large subject. However, the short answer is that you can't. The Coal Board veterans who control the relevant department so interpret the legislation.

Of course, the experien
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 20/11/2010 15:58:03   Subject: Securing abandoned mines against entry
[quote="staffordshirechina"]Tamarmole,
As I understand it, all mining inspectors require an MQB Class 1 (Managers) certificate of competence so it is impossible to get an inspector without a coa
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 20/11/2010 08:00:26   Subject: Securing abandoned mines against entry
[quote="Morlock"][quote="jagman"][quote="derrickman"]unfortunately, not so.

[/quote]

According to the lawyers of a very large mine owning company within the UK fences and signs a
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 19/11/2010 13:28:26   Subject: Securing abandoned mines against entry
another vote for the Derbs document. I don't think it's any coincidence that the consultant for the Combe Down project is based in Chesterfield.

That said, the Cornish shafts tend to be ra
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 19/11/2010 06:50:45   Subject: Securing abandoned mines against entry
unfortunately, not so.

When I was at Combe Down, we fitted several quite elaborate gates and/or grilles over entries specifically because various locals were in the habit of using them for
Topic: Securing abandoned mines against entry
derrickman

Forum: General Chat   Posted: 18/11/2010 23:03:51   Subject: Securing abandoned mines against entry
I don't really see why CIRIA are sticking their noses into this issue. There is plenty of expertise about on the subject, plenty of experienced contractors and consultants.

It's probably t
Topic: Geevor trip 1990ish.
derrickman

Forum: South West England   Posted: 18/11/2010 19:58:50   Subject: Geevor trip 1990ish.
I went into Levant in my Cornish interlude, CSM students could be quite competitive about such things in those days....
Topic: Treweeks shaft (Geevor)
derrickman

Forum: South West England   Posted: 15/11/2010 15:21:05   Subject: Treweeks shaft (Geevor)
it was indeed my understanding long ago that a second - Botallack - sub-incline was planned, I believe it appears on the survey model although it was never constructed. However this is from the Victor
Topic: boulby trip
derrickman

Forum: Events   Posted: 14/11/2010 20:55:04   Subject: boulby trip
[quote="Redwinch"][quote="derrickman"] I usually wear a pair of short cotton pyjamas under overalls, they cost about £5 in Tesco's and are [i]just the job for that kind of thing. [/i][/quote]
Topic: Treweeks shaft (Geevor)
derrickman

Forum: South West England   Posted: 14/11/2010 20:02:18   Subject: Treweeks shaft (Geevor)
I'd understood at the time that Geevor had examined the Botallack sett in the 80s and written it off as not warranting the investment, deciding to concentrate on reserves further North.

It
Topic: Treweeks shaft (Geevor)
derrickman

Forum: South West England   Posted: 14/11/2010 18:02:15   Subject: Treweeks shaft (Geevor)
surely this is a long-dead issue?
Topic: Treweeks shaft (Geevor)
derrickman

Forum: South West England   Posted: 14/11/2010 17:03:38   Subject: Treweeks shaft (Geevor)
I never understood why the Allens Shaft headframe survived.
Topic: boulby trip
derrickman

Forum: Events   Posted: 14/11/2010 17:02:15   Subject: boulby trip
yes, probably. I wore my own kit but I have it anyway, I carry a bag with my own kit as a matter of course.
Topic: boulby trip
derrickman

Forum: Events   Posted: 14/11/2010 15:51:10   Subject: boulby trip
Boulby is hot and dry, also gassy in parts.

I went there about 15 months ago for reasons of my own and I usually wear a pair of short cotton pyjamas under overalls, they cost about £5 in T
Topic: Best innovations for the mine explorer...
derrickman

Forum: General Chat   Posted: 01/11/2010 07:23:01   Subject: Best innovations for the mine explorer...
mobile phone, so you don't have to carry pennies in your ammon can and hunt for a phone box when you come out
Topic: Geevor - maximum extent of workings?
derrickman

Forum: South West England   Posted: 21/10/2010 11:24:27   Subject: Geevor - maximum extent of workings?
thanks Bill... I remember that model - must have been a fiendishly fragile and bulky thing to move!

I must make the effort to visit the new museum when time permits.

Topic: Chimney maintenance - silly questions
derrickman

Forum: General Chat   Posted: 18/10/2010 21:14:39   Subject: Chimney maintenance - silly questions
I've been reminded that the clogs were NCB ones, issued to coking plant workers apparently, for walking on top of the retort banks.

Topic: Jug Holes Through Trip
derrickman

Forum: Midlands   Posted: 18/10/2010 21:04:47   Subject: Jug Holes Through Trip
just sent you an email about another topic altogether.

I will be home in about a week for 3 weeks which are pretty busy, the 3 weeks at sea so I am free from early Dec on. I have got a new
Topic: Geevor - maximum extent of workings?
derrickman

Forum: South West England   Posted: 18/10/2010 21:02:02   Subject: Geevor - maximum extent of workings?
yes, maximum extent of all workings including those parts of Levant actually worked plus subsequent submarine lode developments.

stuey - do you have a scan of that plan? I know a thing or
Topic: Geevor - maximum extent of workings?
derrickman

Forum: South West England   Posted: 18/10/2010 20:17:46   Subject: Geevor - maximum extent of workings?
ok, here's a head-scratcher. I've got involved in a thread on another forum... what is the maximum extent of workings at Geevor? How far from Victory Shaft, on plan?
Topic: Jug Holes Through Trip
derrickman

Forum: Midlands   Posted: 18/10/2010 20:15:48   Subject: Jug Holes Through Trip
Jug holes, it's a good few years since I was last there... are you reading this, ttxela?
Topic: Chimney maintenance - silly questions
derrickman

Forum: General Chat   Posted: 17/10/2010 06:23:41   Subject: Chimney maintenance - silly questions
eee, lad, din't tha' wear clogs?

I used to do occasional crack surveys for London Brick in their kilns around Peterborough, and these were always kept at a minimum temperature - there was
Topic: Chimney maintenance - silly questions
derrickman

Forum: General Chat   Posted: 15/10/2010 15:53:14   Subject: Chimney maintenance - silly questions
I would suspect that the conmbination of size, diameter and sheer force of the draught would tend to draw most of the soot up the stack and out the top. Certainly the heavy clouds of thick black smoke
Topic: More Snailbeach
derrickman

Forum: Mine Tramways and Railways   Posted: 15/10/2010 06:26:52   Subject: More Snailbeach
can't open that link from any direction ( although this may be a firewall or server issue since I'm at sea at present ) but did find several in this general vein

[url]http://groups.google.c
Topic: Mining Survey (Cornwall)
derrickman

Forum: South West England   Posted: 14/10/2010 17:13:11   Subject: Mining Survey (Cornwall)
I didn't feel I had any input in that, my perspective being more a case of 'the impact of Cornwall on a mining professional', but I'd be curious to know what conclusions they draw.

I would
Topic: Miners trapped in Chile
derrickman

Forum: South America   Posted: 13/10/2010 15:55:06   Subject: Miners trapped in Chile
you think Cameron would miss a photo opportunity like that?
Topic: Miners trapped in Chile
derrickman

Forum: South America   Posted: 13/10/2010 09:36:52   Subject: Miners trapped in Chile
[quote="Ty Gwyn"]4 Men out now.[/quote]

... and how many wives waiting for them? ::)
Topic: Chimney maintenance - silly questions
derrickman

Forum: General Chat   Posted: 12/10/2010 09:55:50   Subject: Chimney maintenance - silly questions
different question.

Arsenic was calcined from crushed ore in ground-level flues built for that purpose - the remains of such a set can be seen at Bottallack.
Topic: Purbeck ball clay mining
derrickman

Forum: South West England   Posted: 08/10/2010 21:17:37   Subject: Purbeck ball clay mining
the only images I can find are of miners in an arch-and-lagging face with clay spades... did they simply drive headings through the clay deposits? Seems a very restrictive way of working; I can't pict
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 08/10/2010 08:05:18   Subject: LED torches
I don't know the Fenix ones, I can only comment that the Wolf ones seem to be pretty much universal among industrial users. More messing about with the Wolf ones on board last night enabled me to pic
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 07/10/2010 20:55:01   Subject: LED torches
don't you have a door-mounted spot on your land rover? I used to use one for working in the drift at Mountfield, setting out roofbolts - it was great

I've just been out on deck with a Wolf
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 07/10/2010 20:53:09   Subject: LED torches
the Raptor won't do that, it has about twice the range of an Oldham but the spread is very limited

Wolf lamps are great but I don't know about that kind of throw

Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 07/10/2010 20:13:45   Subject: LED torches
depends what you want to spend, really. I've used those rubber-cased rechargable hand-lamps for jobs like examing the undersides of platforms 20m above me, which I'd imagine is plenty for your use?
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 07/10/2010 14:41:10   Subject: LED torches
I should think you do need to 'rest your case', it must weigh a ton....
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 06/10/2010 21:21:40   Subject: LED torches
trossacks? Would these be fiercely bearded horsemen with tall haggis-fur caps, rampaging across the endless grasslands of auchtermuchty?
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 06/10/2010 16:54:54   Subject: LED torches
I worked on a railway viaduct repair job near Corby for a short while in the early 80s, when it was a window into the future - although that wasn't realised at the time - structural mass unemployment
Topic: Upper (Dinas) Silica Mine
derrickman

Forum: South Wales   Posted: 06/10/2010 09:30:25   Subject: Upper (Dinas) Silica Mine
Big Pit is worth seeing
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 06/10/2010 06:43:00   Subject: LED torches
'alternative use'? Would this be a pc reference to certain proverbial US police practices, by any chance? If so, why particularly in the West Midlands?


I've always used maglites becau
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 05/10/2010 13:34:55   Subject: LED torches
[quote="royfellows"][quote="derrickman"]'the stopes soared beyond the range of our caplamps' - David Bick...... How times change ... not really, I've still got my carbide lamp :)
[/quote]
Topic: LED torches
derrickman

Forum: Lamps & Lighting   Posted: 04/10/2010 13:29:40   Subject: LED torches
'the stopes soared beyond the range of our caplamps' - David Bick...... How times change ... not really, I've still got my carbide lamp :)

how much do you expect of a cheapo torch, anyway?
Topic: Purbeck ball clay mining
derrickman

Forum: South West England   Posted: 03/10/2010 16:39:04   Subject: Purbeck ball clay mining
1950s brochure

[url]http://www.clayheritage.org/pages/Dorset-ThePikeFayleBrochureofthe1950s.htm[/url]
Topic: Purbeck ball clay mining
derrickman

Forum: South West England   Posted: 02/10/2010 19:06:11   Subject: Purbeck ball clay mining
Purbeck museum site seems clear enough that No 7 mine was the last, operating from 1990 - 1999

production seems to be current from several open pits, at least at the last website update dat
Topic: Purbeck ball clay mining
derrickman

Forum: South West England   Posted: 02/10/2010 09:52:46   Subject: Purbeck ball clay mining
[url]http://www.pmmmg.org/NordenNumber6Mine.htm[/url]

I remember hearing of this when I was at CSM and I note that underground mining continued to 1999 - anyone know anything about it?
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