Bulletin . eire that has been burning for many years is in the Leonard mine. Itiffects the Leonard, East Colusa, Tramway, and Rarus mines from;he 500 to the 2,000 levels. A fire in the Mountain View mine, notis extensive as those mentioned, affects that mine and the WestColusa. These fires not only heat the adjacent rock to high temperatures but•omplicate the handling of air currents, even compelling at times the:emporary abandonment of fans. Moreover, as nearly all Butte minesire interdependent for ventilation, the heated air from a fire in onenine is frequently carried to other mines. A more
Bulletin . eire that has been burning for many years is in the Leonard mine. Itiffects the Leonard, East Colusa, Tramway, and Rarus mines from;he 500 to the 2,000 levels. A fire in the Mountain View mine, notis extensive as those mentioned, affects that mine and the WestColusa. These fires not only heat the adjacent rock to high temperatures but•omplicate the handling of air currents, even compelling at times the:emporary abandonment of fans. Moreover, as nearly all Butte minesire interdependent for ventilation, the heated air from a fire in onenine is frequently carried to other mines. A more serious trouble,rowever, is that to work veins parallel to the one in which the fire isturning, or to work the burning vein below or above the fire area, aircourses must be made through burning material or through rockintensely heated by the fire. In consequence, high air temperaturesind frequently mine fire gases are encountered. 38 <3 1 HO o J 5» oo «, 60 J* -< UNDERGROUND VENTILATION AT to j$ o o o o flpfl 73 P. & 9, £) ©... OT d a §1— « .O-QO O M>bO oo WOT OT S a> © OJ 3 5f 3 a> d 9 ^» © £ m bo£ efl d to tuOG co © SOT d d OT <D03 d d 00)00 ©*?u. !-. i_ u s-. O . PuMPH^pqe^ pqpq 3 cfl ,Q .03 o |JS|a • bcp 03 ,u > 03 o^^ £ ©•£ o o <u s ft ? a : 03 -o1 ;.-o d • o • £ : 5zj : o 8:S5 : ooooo ooo oo oooooooo oooooooooo ooH f-t lONcOOiCCNHHTJHcO •*}< ododdooddod oi (NNIMNCSHiMINHCM i-i oooooooooo 3
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
