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MINEBK00705
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Last modified
1/12/2009 10:52:44 AM
Creation date
11/18/2007 12:15:13 PM
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Mine Books
County
San Juan
Volume
15
Document
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A
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~.~ . _._ <br />1_tI N I11G AND IdIN1; ]d)JTH ODS--Continued. <br />The lo:rer Tunnel is 2000 feet of crossent whero it. taps the <br />vein, and a Tunnel or drift is run on the vein in an <br />oastnrly diraction for a diotance of 700 feet. This Dt•ift <br />has run through one ore chute abort 380 feet long artd expect <br />to striks another pretty soon. Thsra in ore in all of the <br />Tunnels or Drifts. <br />The method of ore extraction is overhand stopLtg and drifting <br />with air and hand drills. In~ersol.l and wangh drills are <br />being used. , <br />T}}o method of timbering is stalls noel square sets covared with <br />laggln~. <br />The tlmbars ura pinN and ePl•ucn preplrrod by hand and ors <br />sufficient, to narurv safety. <br />Underground trarmnin~ is done by hnncl. <br />Stool. ear am used for •LrumminE. <br />Chutss ar•n loaded i)y hand and gravity, <br />Tho system of vnnt,tiation in natural only in one plnoa,This is <br />an uprni:an whore they havo tc use n fan to brrl:rl.at in the vnnti.l- <br />nt,.t.on. Al.l. Lhn old timbnru huvo bean removed from undnrgruuud <br />and Lha sanJtnry r,nndltionn are food. <br />Candlon ern used far lighL.tnl; undnrgrbund. <br />v 'I' A 1: I li 7' i C G. <br />Total nun!Lur of fr)nt, in Drifts G1400.Co•rt $7,liU per fool„ <br />n o " 1.n Cros ur,ut;b(100, ~~ 1.li, on u n <br />u " " " 111 upraloe L00G, ° l0, un <br />~~ " " " ill DO VU 1. r1171iV1 rlt 1G,GOii. <br />Corrt, 01' noel. pl+r• 1,on ~7.on, <br />Con t; of powdor .lfi{~ per pound. <br />Avoruuo nonuy par Lon x;`30,00. <br />tl.P;N RIdPhOYLD: <br />?. Il.nchlnn dr1l.i.ron <br />" Nulparu <br />2 J~1n0ru <br />1 '1'Smbormun <br />1 Tranmwr• <br />?, 13nglnuer'u <br />1 i+ornninn <br />A.on for 01S~ht houru, <br />'..110 ° n <br />3,00 .. ., „ <br />Q,co " n n <br />4,00 n n n <br />(l, On " " u <br />~J~ <br />~, <br />~i <br />`i <br />i ~! <br />6 <br />;. <br />
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