The Tunnel Ridge Ming Co. begins mining under Interstate 70 from
Pa to Wv....
http://www.theintelligencer.net/news/top-headline ... ania-line/
Expect 2' to 5' of drop in some areas of the Interstate....
https://triblive.com/local/regional/14491092-74/m ... out-2-to-5
Mining to proceed between now and 2038...
BigBarney
Longwall Mining under Interstate 70
- mntbugy
- Member
- Posts: 2041
- Joined: Fri. Dec. 23, 2016 2:36 pm
- Location: clearfield,pa
- Hand Fed Coal Stove: D S 1500, Warm Moring 400
- Baseburners & Antiques: Art Garland 145,GW114 ,Clarion 115, Vestal 20 Globe,New Royal22 Globe, Red Cross Oak 56,Acme Ventiduct 38,Radiant Airblast 626,Home Airblast 62,Moores #7,Moores 3way
- Coal Size/Type: stove and nut and some bit
- Other Heating: Propain
My yard/field is 2 feet lower than it was years ago. Use to be level with the hard road, not no more. Mine subsidence .
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- Member
- Posts: 232
- Joined: Mon. Jan. 24, 2011 8:06 pm
- Location: Waynesboro,Pa
- Hand Fed Coal Stove: Hitzer 30-95
- Coal Size/Type: nut
- Other Heating: New natural gas hot air furnace inst, 2020
https://www.bing.com/videos/search?q=long+wall+mi ... &FORM=VIRE Pretty good video of long wall mining. Notice the jacks being pulled in to support the roof after the shear has removed the coal . Keep in mind the roof is caving in behind the jacks constantly, they hope, to keep the pressure of too much unsupported roof off the jacks. The very large areas mined, with no support left, cause a lot of subsidence.