Bulletin . ng (PI. XIII, A). Hanging shelves carrying an extra supply of stone dust, as used inthe Altofts mine, were likewise provided along the stone-dust zones(PI. XIII, B). Through the courtesy of Mr. Garforth, chairman of the AltoftsColliery Company, the writer was given the opportunity of inspectingthe distribution of stone dust in the mine. The dust is thrown ontothe walls of the roadways by hand, the greater part of the coal dustadhering to them being displaced by the process. Stone dust is also 158 THE EXPLOSIBILITY OF COAL DUST. strewn on the floor. It was stated that every district
Bulletin . ng (PI. XIII, A). Hanging shelves carrying an extra supply of stone dust, as used inthe Altofts mine, were likewise provided along the stone-dust zones(PI. XIII, B). Through the courtesy of Mr. Garforth, chairman of the AltoftsColliery Company, the writer was given the opportunity of inspectingthe distribution of stone dust in the mine. The dust is thrown ontothe walls of the roadways by hand, the greater part of the coal dustadhering to them being displaced by the process. Stone dust is also 158 THE EXPLOSIBILITY OF COAL DUST. strewn on the floor. It was stated that every district in the minewas isolated by stone-dust zones 600 feet in length. The dustrequired but occasional renewal, and its application gave little or notrouble. The cost was said to be about 1 penny (2 cents) per linearyard of roadway with a section of 10 by 7 feet, exclusive of cost of crushing and grinding. Adju stab I e ^ f=^£5weights Drop lever tamed ta*»broadside position so asto show arrangement of— weights. © Figure 17.—Elevation of apparatus for igniting coal dust by gas flame Experiments at the Altofts gallery will be resumed in May, a fuH report on the work done to date is being preparedand will be published a For a review of some of the conclusions in the first report on the work at Altofts, see page 90. INVKSI [Q VI [ONH \T [{Op] \ ?. I \ I IONB. INVESTIGATIONS AT FRAMKHIKS IN OF INQ1 [BY, In Belgium Investigations on coal du I have been chiefly directedlo the degree of inflammability as compared with the volatile mattercontained in the dust,, and »»lso to the liability < i;riiiii\ explo-sives in I he absence ! gas. OBJECTIONS TO WATERING ROADWAYS. The possibility of minimizing the coal-dust danger by watering theroadways has had to be at least temporarily disregarded in view ofthe prejudicial effect both on the health of the miners and on theeconomical working of the mines which that measure
Size: 1298px × 1924px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
