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Posts by derrickman

Showing 1334 results below:

Author Message
Topic: Castle-an-Dinas
derrickman

Forum: South West England   Posted: 19/11/2009 12:29:39   Subject: Castle-an-Dinas
there are two separate entities - the granite quarry and the wolframite mine.

They are different operations in different places, and that's all there is to it.
Topic: Castle-an-Dinas
derrickman

Forum: South West England   Posted: 19/11/2009 11:47:52   Subject: Castle-an-Dinas
[quote="ttxela"]I thought opencast was a quarry unless what was extracted was ore but underground was a mine unless what was extracted was freestone or dimension stone.

I may have made this
Topic: Castle-an-Dinas
derrickman

Forum: South West England   Posted: 19/11/2009 09:46:16   Subject: Castle-an-Dinas
[quote="unregistered user"]It's most certainly a mine. Look at the section of the place. It is bloody deep! It most certainly isn't a bowl shaped, open aired excavation.

I figure people ar
Topic: Holmans building
derrickman

Forum: South West England   Posted: 19/11/2009 00:53:57   Subject: Holmans building
I remember going underground at Santon in the 70s via a lift in one corner of the offices.. odd sort of experience.
Topic: Castle-an-Dinas
derrickman

Forum: South West England   Posted: 19/11/2009 00:51:00   Subject: Castle-an-Dinas
I would say it was a mine, on the basis that it is/was underground, and worked on a pattern of stoping for ore rather than bulk extraction of product.

by the same definition an open-cast ir
Topic: Holmans building
derrickman

Forum: South West England   Posted: 18/11/2009 23:39:13   Subject: Holmans building
Holmans was a super building, just a really fine structure with lots of history behind it.

Topic: Holmans building
derrickman

Forum: South West England   Posted: 18/11/2009 18:21:29   Subject: Holmans building
shame :(

Carbis Bay is a huge beach, but the trek over the Towans at Hayle used to put a lot of people off. I don't know if its any different now?

I tried, some good few years
Topic: Cornwall Council buys Castle-an-Dinas quarry
derrickman

Forum: South West England   Posted: 18/11/2009 14:44:27   Subject: Cornwall Council buys Castle-an-Dinas quarry
good to see some money spent on something which makes a bit more sense... stand by for two bus-loads of touchy-feely diversity outeach co-ordinators and other sundry Guardian readers and tree-huggers!
Topic: Any words of wisdom?
derrickman

Forum: North East England   Posted: 18/11/2009 12:17:32   Subject: Any words of wisdom?
I was also thinking of the complex ( and sometimes quite poisonous ) undergrowth of existing bodies within the local authority, or some possible community project whose interests or funding demands yo
Topic: Holmans building
derrickman

Forum: South West England   Posted: 18/11/2009 10:35:28   Subject: Holmans building
usually it's only the facade which is kept, the interior configuration is usually quite unsuitable and the problems involved with power, water and sanitation are such that a new building is easier.
Topic: Holmans building
derrickman

Forum: South West England   Posted: 18/11/2009 09:34:04   Subject: Holmans building
just following the thread over on ME about the last Holmans building being demolished.

being sufficiently long in the tooth to remember it at work, I'd say this was a great shame because (a
Topic: Any words of wisdom?
derrickman

Forum: North East England   Posted: 18/11/2009 08:44:27   Subject: Any words of wisdom?
it would be interesting to have some idea of what the nature of your "non-profit community project" actually was.

as has already been pointed out, quarry owners are, generally speaking, com
Topic: Barbarous practices
derrickman

Forum: General Chat   Posted: 16/11/2009 15:15:11   Subject: Barbarous practices
from "1066 and all that", Sellers and Yeatman

When Cnut Cyng the Witan wold enfeoff
Of infangthief and outfangthief
Wonderlich were they enwraged
And wordwar waged
Sware
Topic: Barbarous practices
derrickman

Forum: General Chat   Posted: 16/11/2009 11:11:22   Subject: Barbarous practices
I'd probably agree with the proviso about Hull...
Topic: Wellies!
derrickman

Forum: Exploration Chat   Posted: 14/11/2009 09:40:02   Subject: Wellies!
those fire brigade boots are great, can't beat them for working in concrete or chemical slurry environments.

Dunlops are good but they don't tend to fit that well, so if it's cold and you a
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 12/11/2009 14:38:07   Subject: Croesor - A Floor West
I don't believe that was unique to slate by any means.

Post-war Britain was, to all intents and purposes, bankrupt and investment was desperately hard to come by. The national infrastructu
Topic: The Combe Down Stone Mines Stabilisation Project
derrickman

Forum: South West England   Posted: 12/11/2009 13:31:56   Subject: The Combe Down Stone Mines Stabilisation Project
I think this must be the most photographed and publicized job I've ever been on!
Topic: Wellies!
derrickman

Forum: Exploration Chat   Posted: 11/11/2009 22:03:29   Subject: Wellies!
I once had a pair of the old Whernside Wellies with the vibram soles, best boots I have ever had for caving.

these days I just use whatever I get from work. For choice I prefer leather boo
Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 16:20:58   Subject: The Thames Tunnel
the Brunels, father and son, are a clear example of the value of suitably qualified immigrants. The Huegeonots were generally speaking, professional and technical people with a good standard of educat
Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 15:31:32   Subject: The Thames Tunnel
from recollection and experience elsewhere, I would think it more likely that the process had run its course without coming to agreement.

I've often found that certain elements within the p
Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 15:16:29   Subject: The Thames Tunnel
it's my long experience that the 'preservationistas' appear in force once a job begins, partly because it's very difficult to progress anything while the project has no specific existence.

Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 14:25:24   Subject: The Thames Tunnel
I took exception to losing several weeks' earnings on this account... :blink:

on a more serious note, the work involved the substantial demolition of the internal lining due to its unsa
Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 09:51:51   Subject: The Thames Tunnel
the survey work was interesting; I was involved during the closure and re-opening phase.

the tunnel was surveyed in cross-section using the then-new robotic total stations and data loggers
Topic: Gas from old coal mines
derrickman

Forum: General Chat   Posted: 11/11/2009 08:26:59   Subject: Gas from old coal mines
methane extraction drilling ahead of working faces is a long-established technique. Foraky had two or three rigs doing this full-time in the 70s and early 80s.

I don't know much about it, b
Topic: The Thames Tunnel
derrickman

Forum: General Chat   Posted: 11/11/2009 06:50:13   Subject: The Thames Tunnel
it runs from Wapping to Rotherhithe, between the stations of that name on the East London Line of LUL. It has no connection with the Greenwich foot tunnel.

it was a spectacular commercial
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 10/11/2009 12:47:46   Subject: Croesor - A Floor West
ok understood.

re; pillar robbing using experienced men, I would think that would be very important in such an exercise.

I see what you say about access etc. I don't know the are
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 10/11/2009 10:18:06   Subject: Croesor - A Floor West
so.....

1) the lower level connection referred to, was never completed as a drainage adit, because that was not its original purpose. It was in fact, an aborted development for a section of
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 09/11/2009 21:15:09   Subject: Croesor - A Floor West
that would fit, Ron Hooper arranged it, which usually meant he had some consultancy interest under one or other of his 'County' hats.
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 09/11/2009 18:16:09   Subject: Croesor - A Floor West
I take it by 'working the pillars' you mean untopping?

so.. there is an incomplete drainage level lower down which would have drained the mine to that level if completed?
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 09/11/2009 16:28:06   Subject: Croesor - A Floor West
ok, so, the mine water level has risen by around 30m between first exploration attempts and the early 1980s and is now stable at adit level?
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 09/11/2009 16:00:34   Subject: Croesor - A Floor West
"This builds on a couple of queries raised by GrahamI's map of this area, which is partially based on guesswork as the area was not accessible until the chambers flooded sufficiently to give access al
Topic: Croesor - A Floor West
derrickman

Forum: North Wales   Posted: 09/11/2009 15:22:02   Subject: Croesor - A Floor West
given the time that the mine has been abandoned, I'm a little puzzled as to why the water levels now seem to be rising visibly - or am I missing something?
Topic: Greenside and Kit Hill Explosions
derrickman

Forum: North Wales   Posted: 09/11/2009 09:04:09   Subject: Greenside and Kit Hill Explosions
no readybrek in those days, either :lol:

there was some seriously scary scaffolding at Angel Station.. the Lower Concourse chamber was 9.5m or 10.3m diameter, I don't recall which, and th
Topic: WCMS trip to Box
derrickman

Forum: South West England   Posted: 09/11/2009 08:30:50   Subject: WCMS trip to Box
I didn't, because my camera conked out. But there were a LOT of pictures taken so I'm sure they will appear before long
Topic: WCMS trip to Box
derrickman

Forum: South West England   Posted: 08/11/2009 16:44:34   Subject: WCMS trip to Box
just to say, a really good trip round Box with WCMS this weekend.

spectacular mine, interesting group from several areas with lots new to hear about. Glad I went.
Topic: Greenside and Kit Hill Explosions
derrickman

Forum: North Wales   Posted: 07/11/2009 22:05:05   Subject: Greenside and Kit Hill Explosions
well, to a fair extent that is true.. but I did do the survey control for the Angel Station, which includes the longest escalator in Europe, plus escalators at Liverpool Street and Waterloo ( the one
Topic: Mining Terminology - Horse Levels
derrickman

Forum: Mining Methods & Techniques   Posted: 06/11/2009 20:55:06   Subject: Mining Terminology - Horse Levels
coal mining, metal mining and slate mining terms differ considerably.

There are further variations related to bulk, low value products like potash, salt and ironstone where a pillar-and-st
Topic: Greenside and Kit Hill Explosions
derrickman

Forum: North Wales   Posted: 06/11/2009 18:48:05   Subject: Greenside and Kit Hill Explosions
that sounds about right.

I set out the bolting fans at Robertsbridge incline ( British Gypsum ) in the 1980s in the same way, the vertical post was positioned accurately and then there was
Topic: Triangular Launder
derrickman

Forum: Mining Methods & Techniques   Posted: 06/11/2009 08:29:37   Subject: Triangular Launder
I would guess the main attraction would be ease of construction, only one joint; and it could be either supported on crossed uprights or in a shallow scrape, and its own weight would tend to hold it t
Topic: Divining-rods
derrickman

Forum: General Chat   Posted: 05/11/2009 21:02:24   Subject: Divining-rods
I've seen it done, mainly for water.

My experience has tended to be that it works in general terms, most of the time, for most people, but shouldn't be relied on in detail; ie it's not bad
Topic: Divining-rods
derrickman

Forum: General Chat   Posted: 05/11/2009 15:32:11   Subject: Divining-rods
that's a super word, cryptesthesia

what does it mean? fake senses? unknown sense?

"mummy mummy, why is that monk walking about a foot above the groud? - it's called levitation, d
Topic: Speed of AN
derrickman

Forum: General Chat   Posted: 05/11/2009 13:19:16   Subject: Speed of AN
I had a new laptop with Vista a couple of years ago. I had no end of problems with interfacing to WiFi networks on vessels and in hotels, and with problems running various commercial softyware written
Topic: Penrhyn Railway rebuilding to start
derrickman

Forum: North Wales   Posted: 05/11/2009 10:26:36   Subject: Penrhyn Railway rebuilding to start
horses for courses.

that may not be quite the right question. If I was local, I might prefer to see quarry lorries paying drivers' wages, than a fairly small-scale enthusiast's club blockin
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 05/11/2009 08:33:59   Subject: Cwmystwyth: Underground access
interesting detail about the details of the layout and run-off. It's much easier to envisage it if you have some information.

I shouldn't think EA are interested in pursuing anyone over pol
Topic: Clogau "Welsh" Gold
derrickman

Forum: North Wales   Posted: 05/11/2009 08:17:57   Subject: Clogau
I have a signet ring ( now sadly worn beyond repair ) made in the 1970s from 'German silver', ie a tin/silver alloy, containing Cornish tin.

It started as a pub conversation... Tolgus Tin
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 05/11/2009 00:16:40   Subject: Cwmystwyth: Underground access
interesting stuff.

I hadn't really considered the aspect of pursuing the trust for the costs of pollution alleviation, but the point is well made.

However there is another probl
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 04/11/2009 15:31:18   Subject: Cwmystwyth: Underground access
I wasn't being facetious about knowing MASHAM, well not entirely anyway.

any experienced miner would be familiar with at least those parts of it, or its preceding legislation, which affect
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 04/11/2009 15:11:32   Subject: Cwmystwyth: Underground access
at the risk of appearing a :smartass: , knowing MASHAM might be a pretty good definition of the distinction between 'professional' and 'amateur' in this context...
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 04/11/2009 14:15:21   Subject: Cwmystwyth: Underground access
MASHAM = Management & Administration of Safety & Health at Mines Regulations 1993

superseded the various Mines & Quarries Regulations prior to that date

defines, among many thing
Topic: Cwmystwyth: Underground access
derrickman

Forum: Mid Wales   Posted: 04/11/2009 09:49:12   Subject: Cwmystwyth: Underground access
this has been covered elsewhere in some depth, although with some rather different interpretations on offer.

Roy and I appear to differ on this, for our various reasons.

as far
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