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 Post subject: Potts Colliery
PostPosted: Mon Apr 07, 2008 9:09 pm 
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Joined: Fri Jul 08, 2005 12:41 pm
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Location: Hard coal region, PA
Woah, is that a double tracked slope going down the highwall? Thats pretty neat... the slope going down and the airway up above it.

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PostPosted: Mon Apr 07, 2008 9:20 pm 
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Joined: Fri Jul 15, 2005 2:34 pm
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Location: Within 60 Miles of the Northern Anthracite Field
yea, thats cool! thats an airshaft that went into pitch workings and a slope that was stripped out and through! thats awesome!

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PostPosted: Mon Apr 07, 2008 9:21 pm 
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Joined: Fri Jul 08, 2005 12:41 pm
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Location: Hard coal region, PA
I can't believe the track is still there like that!

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PostPosted: Mon Apr 07, 2008 10:07 pm 
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Joined: Wed Oct 24, 2007 8:00 pm
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Location: From Schuylkill County, PA living in Phoenix, AZ
The 3rd photo I posted is a close up view of that air shaft. The fan house I posted pictures of was located directly above this shaft, about 150 yards away.

I have a few questions I hope you guys can answer. How did the ventilate the mine? Did they circulate the fresh air from the top of the hill through the workings & did it exit through the air shaft on the side of the mountain?

How does the shaft with the steps tie into this? Did they have multiple air shafts?
About 50 yards from the fan house there was a 1 1/2 ft diameter pipe at a 45° angle. It sounded pretty deep. When I threw a rock down it, it took a while to hit the bottom. What did they use it for?

M.T.

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Last edited by miket145 on Tue Apr 08, 2008 6:53 pm, edited 1 time in total.

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 Post subject:
PostPosted: Mon Apr 07, 2008 10:24 pm 
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Joined: Fri Jul 15, 2005 2:34 pm
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Location: Within 60 Miles of the Northern Anthracite Field
hey mike, well in alot of southern field and middle field mines they would use blowing fans. this being because alot of the chutes they ran out to the surface, or they ran so close that the surface fell in. this created a ventilation problem if you are using a negative pressure system with a sucking fan but a blowing fan would simply use these cropfalls as exhaust holes. i have never been to that site, but without seeing that entire fan house i cant say for sure what it is. from there it appears to be a blowing fan. that other airway that goes to no where now, that could have been either, tough to tell now. the airshaft with the steps, that looks to be an escapeway / airway. my guess is they used the fan houses to blow into the mine and this shaft for a return. but like i said, i have never been to that site, or taken a look at the mine maps for there. that would tell you in an instant.

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PostPosted: Mon Apr 07, 2008 10:53 pm 
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Location: From Schuylkill County, PA living in Phoenix, AZ
Chris wrote:
i have never been to that site.


Thanks for the ventilation info Chris.

Next time your in the Ashland area, I'll show you around the site.

M.T.

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 Post subject:
PostPosted: Wed Apr 09, 2008 9:48 pm 
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Joined: Thu Feb 22, 2007 9:37 pm
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Location: Schuylkill County
The shaft with the stairs is a exhaust air shaft that goes down to the mammouth workings. the shaft intercepts the mammouth vein at the top of an anticline(upside-down basin). the way the geology is in this area, the rocks are folded forming an inverted basin, so if you were looking at a cross section of the immedate area, the coal veins would make a upside-down "U". in the mammouth vein, the highest point in this "U" is about 200' underground, so they made a shaft at the top of this "U" going right to the surface.
in other areas, where the coal veins outcrop at the surface, the air from the main fan would exhaust out of the cropfalls, but since the mammouth vein does not outcrop to the surface in this area, there are no cropfalls so they had to create an outlet fot the air to escape.


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PostPosted: Wed Apr 09, 2008 10:02 pm 
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Location: Within 60 Miles of the Northern Anthracite Field
and there ya have it..... potts colly airshaft and cropfall explanation from the cropfall expert himself. :D

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