Reports of the Inspectors of Mines of the anthracite coal regions of ...

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62 ANNUAL REPORT OF TEE Invkntors of Safkty Lamps. JPirst. i Davy lamp i 8 Stephenson 8 CD >— CD :: ^. o o! 2.; QV; ! CD : X 4 10 Clannj' 8 5 /Second. Davy Hi 2 Stephenson lUJ 60 Clauuy Ill 6 ! 1 i ! i Third. Davy 14 Stephenson Clannv 14 14 I 3 5 3 Safety Lamp Tests. >" Exploded. Went out. Went out. Exploded. Still burning. Exploded. Exploded. Went out. Went out. •-! O -! - J"- 2. S' c" Inventors of 2 ,rr « ;;; Safety Lamps. 2 „. ^ ^ 2^^ a; ii. Fourth. Davy Stephenson Clannv Fifth. CD 191 19i 19i Davy 25 , Stephenson 25 ^ Clannv 25 SLrth. Davy .Stepbenson Clannv C 1 4 39 Exploded. Went out. Went out. Exploded. Went out. Still burning. 34 1 1 • j Exploded. 34ii 4 Exploded. Still burnini 34 1' 15 I It will be understood by the foregoing trials that the lamp invented by Sir Humphrey Davy appears to be the most sensitive in its construction, and as such has become the favorite lamp with the best practical miners. The others are an excellent article in the hands of non-practical men and serves an excellent purpose. Tonnage of the Philadelphia and Reading Coal and Iron Company's Collieries in 1815. Names of their Collieries.
INSPECTORS OF MLNES. 63 Yextilation of Mines. The gravity of the subject of correctly ventilating collieries that generate fire-darap gas, and noxious air and deleterious vapors recommends itself to the thinking public for a thorough practical solution. Tliere needs be a more vigorous stand taken for destroying its influence than has been the case heretofore, as the drift and tunnel collieries are yielding to slope and shaft development, and consequently fire-damp gas becomes more and more increased, and far more diflicalt for removal, chiefly owing to the great depth and tlie sj'stem of working the mine in lifts and counter-lifts that it is next to impossible to keep these large excavations clear of stand gas, impure air and powder smoke after the first round of shots are fired off in the morning. To depend upon the action of a 20-horse power exhaust fan to execute the work of ventilating a large mine is simply out of the question to do so safely. The owners of collieries to avail themselves of the benefit of a steam fan generally do so for the purpose of supplying fresh air to their miners, but it is impossible for the single fan to supply fresh air and expel the noxious gases that pervade every conceivable aperture in a mine. Although tlie velocity of the air currents may appear satisfactory in quantity their condition may be so loaded with fire-damp and noxious gases that the safety and health of the men may be endangered, and even the safety-lamp may not be much of a security when used in such rapid currents of vitiated air. The discharge of shots will displace the fire-damp that may be held back by the passing current, and thus become mingled with it in its exit outward, where it ma}' come in contact with the lamps and explode. Every mine boss is aware of this circumstance, and does what he can to prevent explosions, while he cannot control the large volumes of deleterious air in circîlation. The safe remedy then would be in this event is to erect two separate fans, one of which to be located at a point as near the working places as could be, and all the fresh air introduced for ventilating the working places to be controled by the action of this fan ; while the other suction fan should be situated at a locality that would reverse the air currents in the old abandoned or idle works and expel it therefrom ; both these air currents to be made so distinct from each other in their courses that the inlet air could not possibly come in contact with the outlet air, and in this manner the most dangerous mine could be made comparatively safe for men to work in. The cost of securing a colliery in this manner is but trifling in comparison to the great good that wou-ld be realized by the operation of the outlet fan. In collieries that are well ventilated good and intelligent miners are always in full supply, while in badly ventilated collieries the case is the reverse. We had 42 fire-damp explosions in the district collieries during the year, while eleven of these explosions occurred at one colliery, and where the velocity and volume of air that had been kept in circulation would apparently be sufiicient to effect a correct ventihition, but the fault rested in the fact that all the accumulated gases and the inlet air circulated in the same current on its intake and exit to the outcast fan. The strong currents of air circulating in the air passages in a mine will check back the gases that pervade the still open crevices and idle goafs, in the same manner that strong currents of water would hold back small streams or stagnant pools, so in like manner is the gases pent up until the space becomes overcharged, and then it will mingle with the passing current and be carried along with it. The miner may not be aware of this enemy being in proximity to his lamp, where he selected a location for its greater security. But some cause may arise to. necessitate its removal, it may be the miner may light his pipe
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Udver^tôfScjiaJitDa ThtlAhtory Rog
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REPORTS OF THE INSPECTORS OF MINES
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COISTTEISTTS Coniuiunication 5 Repo
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8 ANNUAL REPORT OF THE Eiii'LOYMENT
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INSPECTORS OF MINES. 121 Out crop C
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INSPECTORS OF MINES. ]2& Hazledell
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INSPECTORS OF MIXES. 127 panel. Six
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REPORT €N THE INSPECTION OF COAL
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. INSi'KCTOKS OF .MINES. 121 Damage
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INSPECTORS OF MINES. 133 district o
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INSPECTORS OF MINES. 125 WooD.îDE
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INSPECTORS OP MINES. 14f slope. The
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INSPECTORS OF MINES. 149 18 conduct
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INSPECTORS OF MINES. 161 liemarks.
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IXSPECTOKS OF MINES. 153 shipped du
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Foldout Here
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INSPECTORS OF MINES. 155 •west si
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INSPECTORS OF MINES. 15T 3Iachinery
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INSPECTORS OF MINES. 159 Ventilatio
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m INSPECTORS OF MINES. 161 Summit I
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BEAVER BROOK COLLIERY
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166 ANNUAL REPORT OF THE Messrs. Ch
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228 INSPECTORS OF MINES REPORT. o O
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