Author Topic: Scraper boxes  (Read 1455 times)

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Scraper boxes
« on: July 05, 2021, 08:53:43 pm »
Hello everyone

Have been reading metalliferous mining by s higham it is a very good read to say the least if your into learning about how stuff works and was designed in great detail.

I have asked a few people and these appear to be quite rare and not a a great deal known about them  I am going to kindly ask Chris to attach a couple of photos for how it explains they are used etc

My question is if anyone has seen these on the journeys out could you please say where or if their sensitive sites feel free to private message .

Or any useful information would be great to have added into the thread .

Regards Tom .

Offline ChrisJC

  • Funky
  • forum hero
  • *****
  • Posts: 1622
    • http://www.cowdery.org.uk
Re: Scraper boxes
« Reply #1 on: July 05, 2021, 08:56:31 pm »
Presto!
--
http://www.cowdery.org.uk
Mines, caves,
Land Rovers

Offline Cantclimbtom

  • stalker
  • ***
  • Posts: 277
Re: Scraper boxes
« Reply #2 on: July 06, 2021, 08:00:22 am »
Never noticed, but if the scrap man removed the hoist, cable etc I bet that snatch block would more trouble than worth if far out of reach so I'll keep my eyes peeled for that in future thanks
Expert in incompetent tomfoolery

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #3 on: July 06, 2021, 08:12:35 am »
Is interesting their appears to be many different capacities / types I am surprised I have not seen one or remains indicating this was one , it seems to be a well used technique  as it reduces the cost of Labour  the other benefit being you can have this constantly running especially if their is ore chutes near by , in normal stope conditions,  some times they was short on mine carts coming into it “empty” ones as so much is being removed at once , with this it frees up many mine carts and appears to be a simple design to construct  you still need the winch like always  but appears a very good simple design ?

Tom

Offline LJR

  • AditNow refugee, Staffordshirechina
  • Newbie
  • *
  • Posts: 23
Re: Scraper boxes
« Reply #4 on: July 06, 2021, 08:18:07 am »
Quite a common mining tool. Not just in metal mining but coal too.
There are still some about in working condition.
We used one when infilling the stopes at Snailbeach shown in photo with the late Dave Williams driving the winch.

Offline Minegeo

  • Newbie
  • *
  • Posts: 2
Re: Scraper boxes
« Reply #5 on: July 15, 2021, 09:34:56 am »
Scrapers (or more commonly "slushers") used until early 1980's at Silvermines, Ireland.  Photos from late 1960's (B&W) from Upper G-Zone and late 1970's (colour) B-Zone.


Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #6 on: July 15, 2021, 10:28:03 am »
Very nice thanks for sharing lovely photos

Offline Cantclimbtom

  • stalker
  • ***
  • Posts: 277
Re: Scraper boxes
« Reply #7 on: July 15, 2021, 03:11:14 pm »
Those pics seem to show 2 steel ropes (head and tail presumably), which makes sense, and operation by a pair of levers.

How does that work? Does pulling a lever winch in that cable while releasing the other lever lets it freely pay out?  How does it operate?
Expert in incompetent tomfoolery

Offline Cantclimbtom

  • stalker
  • ***
  • Posts: 277
Re: Scraper boxes
« Reply #8 on: July 15, 2021, 04:07:20 pm »
Looking again... those levers could be brakes, so are there a pair of foot pedals as well out of shot?
Expert in incompetent tomfoolery

Offline Mark

  • forum hero
  • *****
  • Posts: 1305
  • Eldon Pothole Club
Re: Scraper boxes
« Reply #9 on: July 15, 2021, 04:39:30 pm »
Heres one in action


Offline Cantclimbtom

  • stalker
  • ***
  • Posts: 277
Re: Scraper boxes
« Reply #10 on: July 15, 2021, 05:42:58 pm »
Thanks Mark -- that clears it up, looks as simple as it gets to operate

Maybe a kind of digression, but you want to see a big drag bucket?? look at this beast

Expert in incompetent tomfoolery

Offline Minegeo

  • Newbie
  • *
  • Posts: 2
Re: Scraper boxes
« Reply #11 on: July 19, 2021, 09:27:16 am »
Actually the slushers (scrapers) have three ropes:  Pulley blocks are installed at the corners of the stope and the cables from the winch these are attached via these to the back of the slusher bucket.  The third rope is attached to the front of the bucket.  By using the two cables controlled separately the bucket can be dragged to the furthest corners of the stope and then retrieved by the single cable to the ore pass in front of the winch location.

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #12 on: July 19, 2021, 04:10:08 pm »
Definitely going to be keeping my eyes open for of these beauty’s .

Offline Kevin_Williams

  • Newbie
  • *
  • Posts: 3
Re: Scraper boxes
« Reply #13 on: July 19, 2021, 04:41:12 pm »
Having mined in several coal and metalliferrous mines in England, Zambia and USA I have experiences with both compressed air and electric 2 and 3 drum scrapers over the years. I have no preference to either, both are good to use with the three drum easier to work in wider ore bodies.

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #14 on: July 19, 2021, 06:14:37 pm »
Kevin what types of metalliferous mines did you use them in during what time period in the uk ? just am curious as I have not heard much about these before I am assuming iron ?  .

Offline Mark

  • forum hero
  • *****
  • Posts: 1305
  • Eldon Pothole Club
Re: Scraper boxes
« Reply #15 on: July 19, 2021, 07:11:18 pm »
We used them in the 1970s in Sallet Hole Mine (fluorspar) about 60ft above the 130ft Level (which was above the adit level).
We would put a raise hole in the vein (cribbed all the way up) and then drive a small level in the vein, (just big enough to get a long hole rig in) first few rounds would be shovelled by hand, then the slusher would be hauled up the raise hole and used to clear the level for about 100ft to meet the next raise hole.
Long holes were drilled in the vein above the level and the whole lot fired (after the slusher had been moved along beyond the next rise hole)

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #16 on: July 19, 2021, 07:17:12 pm »
Thanks mark most helpful  :thumbsup:

Offline ChrisJC

  • Funky
  • forum hero
  • *****
  • Posts: 1622
    • http://www.cowdery.org.uk
Re: Scraper boxes
« Reply #17 on: July 19, 2021, 07:33:04 pm »
Pic from Tomferry - question to follow.
--
http://www.cowdery.org.uk
Mines, caves,
Land Rovers

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #18 on: July 19, 2021, 07:42:26 pm »
Thanks Chris .

I am reading some pamphlets that I have purchased and was wondering was these common practice during the period after the 2nd world war ? As health and safety started to evolve  and the war time rush finished many new rules / standards / guide lines got brought into place ? Did they give similar out at sallet hole since we already have that in conversation above ?

Offline Mark

  • forum hero
  • *****
  • Posts: 1305
  • Eldon Pothole Club
Re: Scraper boxes
« Reply #19 on: July 19, 2021, 08:42:33 pm »
Thanks Chris .

I am reading some pamphlets that I have purchased and was wondering was these common practice during the period after the 2nd world war ? As health and safety started to evolve  and the war time rush finished many new rules / standards / guide lines got brought into place ? Did they give similar out at sallet hole since we already have that in conversation above ?

There were rules and regulations to be followed but a lot of stuff went on, that would definitely not be allowed now.
It was a hard rock mine nothing like the coal mines with all the hazards.

One health and safety snippet that still makes me chuckle, was the introduction of an accident book next to the clocking off machine

One report went as follows

Nature of injury - "Badly bruised knee"

How did the accident occur - " I was knocking a nail into leg, and hammer slipped"

Offline Kevin_Williams

  • Newbie
  • *
  • Posts: 3
Re: Scraper boxes
« Reply #20 on: July 21, 2021, 12:48:53 pm »
Tom, in the early 70's while fluorspar mining at Redburn mine, Rookhope. For stope cleaning a two drum scraper was used, firstly we pulled it up the stope's access ladder-way. We made it simple by rigging the tail rope over a pulley that we fixed to the top of the stope ladder-way and returned the rope directly to the scraper unit. We then closed the tail brake band so that the unit was able to pull itself up to the top of the stope with its own air power. We had to do this steadily as we moved up ourselves so we could keep the brake band under control. For stope cleaning we would pass the tail rope through a pulley at the far end of the stope and attach it to the back of the scraper hoe with the pulling rope attached to the front of the hoe to enable the filled hoe to be pulled to the scraper unit. For speed in setting the scraping operation up quickly we sometimes wedged a timber into the rock pile in the stope where we could attach the return pulley onto it.
When emptying the stope, the practice of controlling the momentum of the hoe ensured it was easy to place it right at the far end of the stope.
The access ladder-way was usually positioned between two box-holes on the sub level where a wagon was used to empty the box which was filled by the stope’s slushier operation. The full wagon was moved to a dump hole where it was transferred down the ore pass. Trammers on the main 17 fathom level then pulled the transfer pass to fill a train of ore wagons that would be transported back to the shaft for hoisting.
I did use a three drum unit in a wide stope while I was there where there were two tail ropes that enables the hoe to be positioned towards the sides of the stope.
The action of pulling on a brake band lever does operate that drum which pulls the rope. The direction of movement depends on whether the rope is a tail or a pull one.
In England I also experienced 3 drum air slushers in operation from the late 1970’s to 1989 at Geevor Mine. More recently I’ve used an electric 3 drum slusher at South Crofty Mine which for a while we loaded directly into a scooptram!!
On another note, I notice the pictures showing several scrapers in operation do not have any safety features. The Chinese one go's part ways there with the rope roller guides. Should any rope snap there is no protection on any drum shown. The slushers/scrapers I have used in Cornwall all have the necessary guides that would probably comply with current mining and other safety legislation.     

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #21 on: July 21, 2021, 01:22:45 pm »
Thanks Kevin that is  some great information  :thumbsup:

Offline pwhole

  • forum hero
  • *****
  • Posts: 2990
  • TSG, DCA, PDMHS
    • Phil Wolstenholme website
Re: Scraper boxes
« Reply #22 on: July 21, 2021, 01:26:29 pm »
I'm finding all this fascinating, but that was my main thought in all this - what happens if it goes wrong? As in, the scraper just gets totally jammed? Presumably there's only so much load the pulley anchors can take? The winch guy seems awfully vulnerable in that situation. Also the noise operating these things in an enclosed space must be close to unbearable? I'm not seeing many ear-defenders, but is that as they were already deaf? I know Mark can still hear though, so maybe not :)

Offline LJR

  • AditNow refugee, Staffordshirechina
  • Newbie
  • *
  • Posts: 23
Re: Scraper boxes
« Reply #23 on: July 21, 2021, 01:48:30 pm »
Phil, if you look carefully at the photo of Dave Williams, he is wearing defenders. You can just see the orange pivots on his helmet through the condensation that the slusher has chucked out.
As conscientious employers we always provided our men with safety gear.  ;D
I believe TW still has that slusher and bucket in working condition.

Online Tomferry

  • obsessive maniac
  • ***
  • Posts: 379
Re: Scraper boxes
« Reply #24 on: July 21, 2021, 02:00:33 pm »
I am assuming the dangers people are speaking about   flying winch wires etc ?  I did think this myself when I use to have to go collect tarmac on the tipper vans they have set ups that bring the cooking tarmac up to the hopper this is powered by big winch around this winch is a very heavy duty mesh cage , I saw a winch wire break off roading before luckily the guy had his Landrover bonnet up and it hit that I wouldn’t want to be on a receiving end of any of them .

 

Main Menu

Forum Home Help Search
SimplePortal 2.3.5 © 2008-2012, SimplePortal