Keyword Analysis. Answer Time.

[John]

"2 Visits 3.70% when did cotgrave colliery start producing coal"

Sometime in 1964 from a face in the Deep Soft seam, I'm going by the survey date on the abandonment plans.
On the plan I have linked the first survey date is 1-1-65 and the face had been cutting for a few months, so by the rate of cutting my guess would be around July/Aug period in 1964.

This is the Deep Soft seam workings, first face is to the south of the shafts to the east, the last four faces worked in Deep soft were the four to the north. No other faces were worked in that seam.
I did some salvage work when I was transferred there in 1968 on the drive head of one of those faces to the north east.

[John]

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[John]

There's some odd ones in this list of Keywords...

[John]

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[John]

"1 Visit 1.03% wilford pit nottingham"

There was no pit at Wilford, there was a colliery across the river though in the Meadows district of Nottingham, Clifton Colliery.

[John]

"2 Visits 2.06% cotgrave colliery plan"

All colliery abandonment plans can be viewed and copies purchased from the Coal Authority at Berry Hill, Mansfield Notts.

[John]

"1 Visit 1.03% board and pillar over longwall"

There's no real by and for's over the two methods. Shallow workings normally use a form of Bord and Pillar, and very deep mines the same if there are circumstances forbidding them to work longwall.
Most old Colliery owners worked Bord and Pillar pre Nationalization in the UK under cities.
Bord and Pillar reduces the chances of surface subsidence, but is not as efficient as longwalling.

[John]

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[John]

"1 Visit 1.20% boulby koepe winder forum"

Boulby doesn't use Koepe winders.

[John]

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[John]

"1 Visit 0.86% location of wollaton and radford pits"


Seeing as this search was done by someone from Nottm University, the worst part is under your feet. The last longwall faces were modified narrow faces with a large support pillar of coal between them, directly under the main university buildings.

Wollaton pit top was about half a mile north west of the Uni, near Chalfont Drive, right at side of the old canal.

Radford pit top was pretty close to the old Raleigh Cycle works.
They can both be found on street maps of Nottingham from the 1950's to early 60's.

[John]

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[John]

I don't post these every day as most of the time they don't change much, but I noticed someone using the search criteria "What is an LHD used in mining".

Well LHD means Load Haul Dump, it's essentially a diesel powered articulated front end loader, designed for mucking out headings in bord and pillar or stope mines.
Three makes that come to mind are Eimco, Wagner Scooptrams and Bagshaws. They haul about five tons of ore from the face to the loading point.

[John]

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[John]

"1 Visit 1.45% +does proboards advertisers send spam"



Advertisers, "spyders" and "Bots" don't have access to members email addresses.
This is the main reason I request members NEVER post their email addresses on posts.
Spyders and Bots "trawl sites looking for things like that.

[John]

"1 Visit 1.45% baths clifton pit nottingham"


The showers/changing rooms were built sometime in the mid to late 1950's together with the canteen and medical facilities.

[John]

"1 Visit 1.45% coal winding rope break"


I'm not aware of one single rope failure in UK mining in the last 100 years.
There was a fatal accident at Markham Colliery in the 1970's through a brake component failure on the winding engine resulting in a serious overwind of the ascending cage, and causing the descending cage to plunge into the sump boards and the unwinding rope coils falling on top of the cage in pit bottom.

[John]

"1 Visit 1.45% lincolnshire coalfield"

It was never exploited due to the great depths of the coal seams under Lincolnshire.

[John]

"1 Visit 1.45% how can we make drift in coal mine 1in 6"


Much the same as you'd drive any road underground, not sure if you use machinery of drill and blast and hand load the muck out.
When I worked at Angus Place in NSW, we started the new belt drift from the bottom with a Lee Norse CM until it got too steep to keep the CM from sliding back.
I understand contractors completed the job from the surface and met up with the section we started.

[John]

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[John]

"1 Visit 1.41% uk mine voltage standards"


UK Collieries as "mine" refers to any mineral and some of those use industrial equipment, ie 440 3ph.

110 Volts for lighting. and conveyor brake thrusters.
550 Volts used to be the old standard for coal cutters, pumps , haulages etc Was phased out somewhat in the 1970's.
1100 Volts for most face machinery, conveyors, haulage motors and pumps.
3.3Kv used to be the old HV standard in NCB/BC mines, was also used on HV conveyor motors, supply to faces and drivages then transformed down to 550 or 1100 volts.
6.6Kv was the newer HV standard and transformed down to 1100 volts at the face etc..

Not sure if the NCB/BC ever went up to 11Kv, seems the logical choice as equipment got larger.

[dazbt]

Longwall Trepanner;
Anderson Boyes later to become Anderson Strathclyde produced several trepanner varients for use in longwall applications, the single ended trepanner and its trepan shearer morph, a machine based on the AFC mounted AB 16". The first floor mounted double ended trepanner was a 70HP rather complex configuration of cutting elements that was designed to "square off" the barrelled cut produced by the leading auger or trepanning head. An underside mounted horizontal and topside vertical jib and chain cutter integral to each trepanner gearhead removed the floor and roof radiused kerf. At the mid section of the machine length a roof cutting disk that removed goaf-side kerf radius, this roof "turret" and both vertical jib cutters were able to be raised and lowered hydraulically. The resultant cut was ideally square cut in order to facilitate advancement of both the AFC and roof support system.
The AB 70HP trepanner was a fairly reliable and rugged machine that provide large coal from relatively thin / medium seam sections but it simply wasn't powerfull enough to cope with thicker coal ............ the Heavy Duty 120HP floor mounted version followed shortly, in basic principle very similar to the 70hp machine but much bigger and heavier, intended for the production of large coal from the top end of the thin seam applications towards the 4'6" seams and slightly thicker. The HD trepanner was able to cut at faster haulage speeds than its 70HP baby brother and an interesting point perhaps for those that knew and loved the AB16" MK1 single ended hydraulic haulage, the HD trepanner haulage system used just one of the two same three piston hydraulic pumps used to drive that haulage system.
Later developement resulted in the twin electric motor powered Double Ended Conveyor Mounted Trepanner, initially intended to produce large coal at increased production rates from the thinner sectioned coal seams, its acceptance as a successfull coal winner then led to design changes that took the machine into seam sections of 6' and slightly higher. Initially the DECMT was designed with leading trepanning heads, a fixed circular disc cutter mounted underside of each trepan gearhead and a central variable height roof cutting disc and thankfully no jib and chain kerf cutters The thicker seam applications incorporated fixed roof cutters on top of each trepan gearhead and eventually even more exotically a machine that incorporated two 'piggy-back' trepan head gearboxes at each end of the machine.
A third (or possibly fourth) generation trepanner was developed in the late 1980, this was the ultimate 270HP, a totally new engineering concept but practically based upon the same 'effort efficient' method of longwall machine coal cutting as was the 70HP trepanner.

[John]

"2 Visits 2.82% coal seams nottinghamshire"



Not all of these seams can be worked, or found at all Notts pits, some are too thin, others too close to the surface and others missing as they were eroded at the outcrop to the west of the coalfield..

High Main.
First Wales.
Second Wales.
Swinton Pottery.
Clown or Main Hard.
Main Bright.
Two Foot.
Furnace or Low Bright.
High Hazles.
Cinderhill.
1st St John's.
2nd St John's.
Comb.
Top Hard or Barnsley.
Dunsil.
1st Waterloo.
2nd Waterloo.
Waterloo Marker.
Top Second Waterloo.
Bottom Second Waterloo.
3rd Waterloo.
4th Waterloo.
First Ell.
Second Ell.

52 seams in the "upper measures.

The Lower Measures.

Brown Rake.
Joan.
Chavery.
Sitwell.
Roof Soft.
Deep Soft.
Roof Coal.
Smithies.
Deep Hard.
1st Piper.
2nd Piper. These two seams when "joined were called the Parkgate.

Cockleshell.
Low Tupton/Tupton or Low Main.
3/4.
Yard.
Blackshale.
Ashgate..........These two seams are sometimes joined with just a thin layer of dirt.

Mickley.
Walkers.
Kilburn/Wingfield Flags.
Norton.
Forty Yards.
Alton.
1st Smalley.
2nd Smalley.
Holbrook.
Belperlawn.
Baslow.

Base of the Carboniferous strata and start of the Millstone Grit.

[John]

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[John]

"3 Visits 4.35% where was bestwood colliery"

Bestwood Colliery was in Bestwood Village, one of the engine houses, vertical steam engines and headstocks have been preserved and restored in situ for anyone to see and photograph.

[dazbt]

"Horseshoe Bottoms" in Kickapoo Creek by Tommy Tippett ..........

Sounds like a sketch from a Monty Python's episode, perhaps especially written for the exiled colonial M.Python experts who post here occassionally !!
but it's quite a bit different in fact;

coalmine.proboards.com/index.cgi?board=BNP&action=display&thread=580

[John]

"1 Visit 1.08% potash opencast mine yorkshire"


There are no opencast Potash mining operations in Yorkshire, the mineral is just too deep below the surface to economically opencast it. At it's shallowest it would be around 1Km and at it's deepest around 2Km's.
I should also add, it is below the "Sherwood" sandstone layer, which is heavy brine at very high pressures.

[boaz]

The proposed new potash mine has an interesting website
www.yorkpotash.co.uk

[John]

Been there a few times, thanks for posting the link.

[John]

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