Biennial Report, Volumes 1-21883 |
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Results 1-5 of 17
Page 28
... pressure sufficient to raise the water sixty feet above the level of the sand . The Climax Company sunk their No. 2 shaft about one half mile north of their old shaft , in the same basin of coal , and have been ope- rating extensively ...
... pressure sufficient to raise the water sixty feet above the level of the sand . The Climax Company sunk their No. 2 shaft about one half mile north of their old shaft , in the same basin of coal , and have been ope- rating extensively ...
Page 30
... pressure of water that should a fall occur , the water would flood the work- ings before the underground force could escape . DALLAS COUNTY . There have been no new mines of any importance opened in this county since my last report The ...
... pressure of water that should a fall occur , the water would flood the work- ings before the underground force could escape . DALLAS COUNTY . There have been no new mines of any importance opened in this county since my last report The ...
Page 44
... pressure may be , some claim that the coal could be mined without any difficulty . Now , this , in my opin- ion , is wrong . If in prospecting we find sand and water five feet in thickness , with a pressure that will raise the water in ...
... pressure may be , some claim that the coal could be mined without any difficulty . Now , this , in my opin- ion , is wrong . If in prospecting we find sand and water five feet in thickness , with a pressure that will raise the water in ...
Page 49
... pressure at the downcast shaft , it is therefore necessary to employ some means to overcome as much as possible the atmospheric pressure on the air or upcast shaft , and a majority of our mine superintendents have turned their attention ...
... pressure at the downcast shaft , it is therefore necessary to employ some means to overcome as much as possible the atmospheric pressure on the air or upcast shaft , and a majority of our mine superintendents have turned their attention ...
Page 50
... pressure it will overcome at the upcast shaft , and the pressure remaining the same at the down- cast shaft the air is forced through the subterranean passages of the mine to the furnace where it should be heated , in order to keep up ...
... pressure it will overcome at the upcast shaft , and the pressure remaining the same at the down- cast shaft the air is forced through the subterranean passages of the mine to the furnace where it should be heated , in order to keep up ...
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Common terms and phrases
accident air-way Albia Angus appointed bituminous coal Bituminous shales black-damp Blue sand shales Boone county Boonesboro cage carbonic acid cause charge Coal and Mining Coal Company coal measures coal mines comply condition Coroner court creek cubic feet Dark death district dollars Drift deposit duties engine entry escape shaft examination feet per minute five furnace furnish Governor Gray clay shales hoisting shaft hole hundred feet Impure inches inspection inspector of mines jurors Kalo Keokuk county Kirkville labor Light limestone located Lucas county machinery Mahaska county map or plan MCELHANY miles miners mining boss Mining Company mining law Moines river oaths do say opening Oskaloosa Ottumwa owner or agent persons employed Polk county pressure proper railroad rock roof safety safety-lamp sandstone shaft or slope side superintendent therein thereof thickness thousand tion underground ventilation volume of air Wapello county William