The Mexican mining journal . Alamaloya, Chinuahua, Mexico. Permanent and Water-Tight Shaft Construction in Europe and the United States. Timbered shafts are comparatively cheap, especiallywhere timber is as abundant as it has been in manyof the mining regions of the United States, and othermethods of shaft construction are practically unknownin that country. In Europe, and Africa, under differentconditions, construction of a more premanent characteris found economical. In some cases brick is used asa shaft lining, and when the ground is very wet, andit is cheaper to exclude the water than to p
The Mexican mining journal . Alamaloya, Chinuahua, Mexico. Permanent and Water-Tight Shaft Construction in Europe and the United States. Timbered shafts are comparatively cheap, especiallywhere timber is as abundant as it has been in manyof the mining regions of the United States, and othermethods of shaft construction are practically unknownin that country. In Europe, and Africa, under differentconditions, construction of a more premanent characteris found economical. In some cases brick is used asa shaft lining, and when the ground is very wet, andit is cheaper to exclude the water than to pump it out,cast iron plates, sometimes two and one-half inchesthick, are employed. Some of the recent shaft con-struction in America is noted in a paper read beforethe Engineers Club of Philadelphia by Francis Do-naldson. The paper is published in the October num-ber of the clubs proceedings. After describing Euro-pean practice in some detail, Mr. Donaldson continuesin part as follows:— Brick or cast iron linings will not
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
