|
!~,j{ n
<br />r
<br />~i •;,
<br />tv~; _ ~
<br />r ~,;
<br />~;,,. i
<br />i,
<br />~~ ~'
<br />Ii''
<br />~,11,
<br />u~'
<br />~~,
<br />~~a
<br />S
<br />~ 1 .
<br />~'
<br />~i
<br />~•; ;:~
<br />,;,.:•
<br />;.~~.; ~
<br />I,
<br />!+{ ~ '
<br />~~'
<br />~_ ~ f,:
<br />i rij
<br />~~(~ i~
<br />~,.
<br />{,~_
<br />j'! C
<br />~,~~'
<br />i',~ ; !'i
<br />(;
<br />.i:
<br />!~.J.
<br />,~
<br />,{`' ,
<br />'j•
<br />II ~ ~~
<br />`~~
<br />iS~r.
<br />I~'..
<br />4/p '
<br />!~~
<br />~iy/p~'.C ~~
<br />73"
<br />u..
<br />Cashier - 7.
<br />MIIQIHG & MIHE METHODS-Contin.
<br />The ehaft,ia properly aeaurod on ali sides by pillars oY ground
<br />sufficient to secure safety,
<br />The method of oro extraotion is by means of overhand
<br />steping and drifting, Thisq~one with Hardaog, fonder, Piston,
<br />and Hammer maohine drills, Some single hand drilling is done,
<br />Tho method of timbering is with posts and oaps and atolls
<br />covered ;.ith lagging. Tho timbers are prepsrod by hand from
<br />pine, are in good condition and sufficient to aeouro safety,
<br />Underground tramming is done by hand with steel buckets
<br />and wood trollies, The traokago is 18" gnage and 8g T rails.
<br />Chutes are loaded by hand and gravity.
<br />Tho amount of water to be dealt with averages about
<br />9,000 gallons every twenty-fog. hours. This is handled by means
<br />of a 200-Callon barrel.
<br />The natttral system of ventilation is employed and is
<br />sufficient, Conneotion has boott made with all•oY the levels
<br />and also through the ldeoker shaft whioh furnishes a strong •
<br />draft through the mine,•On aooeunt oP weather oonditiona at
<br />rare intervals oarbonio aoid gas oanaos Bono alight annoyanoe,
<br />All old timbers have boon removed from underground and
<br />the sanitary oonditiona rtro good.
<br />Candles are used Yor lighting underground.
<br />S T A T I S T I C S,
<br />Avorngo tonnage per month, b0 tone,
<br />Crosn Produotion of ore not knovm.
<br />6verago vnlne of ore per ton; YbO.
<br />Cost per ton mining of ore, ---__
<br />Cost per ton transporting of oro. x•1.10. .
<br />Cost par ton treatment of mill ore, ~,?8,
<br />Coat per ton treatment of emoltine ore, y6~b0~
<br />Coot of Ynol per ton, ~5.'i0. Aver. oost per non.,~100.
<br />" timber
<br />• in., •12, " ~ n
<br />ice.. ~ ~/fi•
<br />
<br />
<br />
|