Canadian mining journal January-June 1905 . ther place to which therewas access unless the dust,which was very fine, com-bined with oil dropped fromthe pit tub axles, made thecondition more favorable forspontaneous combustion, andwith the enormous weight ofthe roof that had fallen, press-ing upon it, excluding the aircurrent. The stone removed from thewalls amounted in roundnumbers to 25,000 tons, andwas removed from the does not include aboutan equal quantity which wasremoved from the falls whenreaching the working face, asthis was stowed in the places where these fallshad t
Canadian mining journal January-June 1905 . ther place to which therewas access unless the dust,which was very fine, com-bined with oil dropped fromthe pit tub axles, made thecondition more favorable forspontaneous combustion, andwith the enormous weight ofthe roof that had fallen, press-ing upon it, excluding the aircurrent. The stone removed from thewalls amounted in roundnumbers to 25,000 tons, andwas removed from the does not include aboutan equal quantity which wasremoved from the falls whenreaching the working face, asthis was stowed in the places where these fallshad taken place were newly-timbered. About 3,000 boomswere put in, besides props,etc., used for lofting. In someplaces where the roof wasvery heavy props were usedin the centre of the boom. No harm was done to theshaft, but around the shaftbottom, as shown on the planby parallel shading, the actionof the heat on the roof madeit necessary to bring it downto a height of two feet, whichgreatly improved the condi-tion of the roads about theplace. ^. ?4 THE CANADIAN MINING REVIEW. 57 The Mines of Ontario. By W. E. H. Carter, *(Concluded.) CORUNDUM abrasive mineral was first discovered in Canada in1896, in the township of Carlow, County of Hastings, Ontario,1 and in the two years following received particular attention inthe way of exploration of the area of occurrence by Provincialand Dominion geologists, whose exhaustive reports (12) ap-peared shortly after. No discussion, therefore, need be hereundertaken on the geologic phase of the present situation ofthe industry. The corundum is associated, as a constituent,with igneous rocks embracing the ordinary varieties of sye-nite, syenite pagmatite, nepheline syenite and anorthosite, andis always crystalline and disseminated. Where mined so farthe rock as roughly sorted has contained 10 per cent, or betterof corundum, which is a probable average of the various de-posits now opened up. Further work in the field by privateent
Size: 1002px × 2493px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
