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Show Underground Hoist Is Inspected S g Jjt -J$ Put In by Silver King Coalition MASSIVE machinery of the underground hoist of the Silver King Coalition Mines company at Park City. Top Motors and switchboard in the compressor room; center, the giant hoist, showing the gallows frame in the rear; bottom, the new compressor. f ' f ;M 1 r : : . v s N n x - 't ' y ' ' f n - i T""e , . s V' r " ' s : r ' miiW"1'- . 1 y . ff - . 1 1 ..-,: 'if' "" f- 1 ' - -V s ! , "i , ? l-- 'r-- --.j ' ?( ' - : ', ' :- ! - rtJ k i . " - "., A. . " V ? , r . I ' -..' ; ' ' v -y - ' - - - " - ... ... I Party From Salt Lake Sees Wonderful New Station. $ TilK ponderous marhinftrr of th big underground hoisting and compressor station of tho Silver Kinc Coalition Mines fornj'Hny at F'Hrk "'itv is all in position, tunod up and running as smoothly aa clorfcwork. Vetrdav fix of tho nine dirotorg of the eompany, pome of the stockholders and a few invited guests visitod the wonderful station 1G70 feet bolow the Mirface anl saw the new instaJlntion in operation. j Most of th party wrnt from Salt Lake, some, ijoin' hv auto and some by train, and thee were joined by a few others at Park City. On arrival at Park City thn party wa.s conveyed by wa to the. iifrta of the Allianeo tunnel, tun-nel, where a trn i n of mi ne earn fl raw n bv ati electric motor wan in waiting, and in chart:' "f Suerintenient .Janien Hunir:.-, prncefderf on the two-mile underground un-derground ri'le to the new Matinn. Tii it station i in tin; Silvor Hill e. tion o!" the jluM-acre Kiri Coalition estate, f';i) teet in a direct line, or about two mile, following. the wind iiifcTf. of the Alliance tunnel from tho Kmpire ranvnn portal of that lnng adit. On the arrival of tho party tho ma-rhinerv ma-rhinerv wa tarter, run "or a time and stopped, the operation being ro-peatC'l ro-peatC'l several times for tho he.ne.fH of the visitors. ' Tho smoothnesg with which the great machine, ewpneinllv th1 hoit, do their work i marvelou, and excited th" wonder and admiration of all who wit nnsfd the demonstration. The starting, running and stopping ot the ponderous hoist is no ne;irlv noiso-1ps noiso-1ps that no sounrl is audible beyond few fer-t except thn release of tho com pre?ed air. Description of Station. The following description, of the station sta-tion and its equipment is from the April number of Minn and Quarry, and is practically a condensation of a more detailed article on tho subject, writ ten bv L. O. Howard and published in the Halt Fyfikc Mining Review of November 30, KM.'i: For thn proper development of 1 this section of tho Silver King j property It, oocamn advisable to i sink a shaft from 1200 to 1 :)()0 fnt in depth at, a point, about two mile in from the month of tho Alliance tunnel. This point is muler lo7' feet, n P cover, and corresponds in elevation with the ."00-foot level of the main King shaft, through which tho principal operations of the c.ompanv have been carried on thus far. The proposer aha ft, will be cut. through to the fpiart.lte ! c oTitaei, underlying the ore bor v that, is now bdng worked, through the King shaft, at. a depth of HOl) 1 to 1200 feet. Tn order to provide hoisting nnd rompreti",ei nir service for the now shaft, the company decid'-d to con it met si n u rid err r rui ml station in the qoTid rock. This station y. one of the la rgeit of the k i ml i it this eountrv. nnd the work uhn'h it. will be called upon to do is mioia irn-I irn-I portnnt than has been i nderl n k en j el-iewhere from an underfrround j Nation. Tbe.re a.ro thrno rooms or : ' . f " ;L ' " A 1 ' v ' - :'.-:-';..v ' - C- ,VY' ' "C r-; ".V; ... ... ' v:i-V". , l ... -':.',.. 1 t , ' ' C . it - -iii - r - ' - ' chambers; first, a compressor room, -12 feet long, Ou feet wido aud l!0 i feet high. Anh Is Elliptical. The roof arch of this room is rl I liptical, and all tho walls, as well a ' the roof, aro of henvy reinforced j con c ret e, designed to support the heavy top ot badlv broken lime rock. Adjoining the compressor room N. second, the engine room, 42 feet long, .'Ci feet wide ami rising ris-ing in height from 1 2 1 j feet, nt the ia'k tcwaid the .shaft, nt which it is 21 feet high. Tho rooms are finished with smooth white cement plnst er and are well I i ght ed bv electricity. Third; the remaining rha mber is that e sen nt ed for the head frame. This is sufltcient 1 v large to aecorn mod a t tho stee frame, KSVy feet hi'h from the foil ndati fin to t he renter of 1 lie sheaves, with a spread of 2" fee) from front to back, and a width of feet. The distance, from the center of the shaft, to the renter of the hoist reds i I't feet, ITow Air Is Supplied. A)r for the tunnel. hafl and con flt.rurtinn of the slniion luts been supplied hv tliree ji rge nir corn-pro"sors corn-pro"sors on the surface, which nbtn furnish air for the King shaft and its work i ngs, It ;ih coimiilered n '1 vi s hlo to install an n uxi 1 in r coniU'oiftnr in the undervroiitirl jiownr stnt ion , to act im a lionet er on the main line, and nltimntelv to give regu In r addi t iona 1 rnpacHv fm-sinking fm-sinking the shaft and rle velopi ur the new workings lielow the tunnel l.cl. The ma-hine selected for this purpose, pa rt icu la rly on nc-count nc-count of iln compa ct iwis and hitrh a i r rn paci 1 v per unit of Hour npnfe, was a SuHivnii elit-i W , I ' 1 At'i'le contpouii'l coin pressor, wild low presenile cviinter II incline in diameter, nnd a common com-mon stroke of 1 I inrhe-.. At Itn rated speed of 2 1 .1 rewditt iontf per minute, this machine has a displacement dis-placement capacity of ,sv cubic, feet of freo air per minute. Idea of Engineers. '1 he idea of the engineers in. dr-signing dr-signing this plan) wan to have the cum p render nt i lire the elect nc cur rent (luring the inteinN when the hoist was not running, tliu eliminating elimi-nating excessive peak loads. To aecotnidi sh this the compressor uniojider is connected with the hoiM , so that when current is t hrown into the mot or of the latter lat-ter t liiM nc t inn a ul omat na Ily n n loads the compressor ami allows nea rly the, en fire po w cr of t he synchronous motor set to be anil-able anil-able for the hoist motor. When the hoist i ng current is t hrnwn olV the iinleader on t lu1 compri-sor is ;u t omat ica My opened, a I low i ng the uimhine to work und er full load again, thus providing a high load factor for the motor generator set. as well as nearly constant current demand. This ,s nchrouons motor genera t or set f ii Hushes d irect cur-rent cur-rent at (ion volts ' for the hoist, :uyl the motor of the set tulles nir-rent nir-rent from thn transmission lines on Hie sttrfnee :i( '.'L'iMl volts A. (' ith a rated continuous input nt K'. and haing SO per cent pon er find or. A mot or gnnerat or . Miici se liiriinhcs direct current e vcit a I ion for the large sy n ctnonouH motor of the large set. Tli ere is nbnndant room in t lie com u i'-kit ul a I inn for the nddi tion of three to four other units of the lame type, rdmuld greater compressor com-pressor capacity be desired later on . Driven by Electricity. Ml the machinery of this uim;i latum is electrically d ri ven, t he cu r leu! being obtained from the Tel-1 Tel-1 1 1 : i d e 'ow er coin pn nv 's plant on the ''rnvd river. It is curried through the mum hv mentis of an imu'enrn cable, which, wit h its insulating coerinir. is about two inches in diameter. It is laid alon one side and at the b'dtoni of the tunnel, except where it has to be raised to pns o!her adits d;verc-ine d;verc-ine from the mam channel. This calde is .i'1.' feet lon. Wit h in a few days the wor of sinkinL' the 1.1 ft , v hich is now down .".70 let, will le resumed and pushed "t cndil v forward. It is expected ex-pected the contact, will be reached in somcthini: like from to IJ '11 feet. This work is not in barren ground bv anv means. It is expected ex-pected that ore will lie encountered on everv level, or nearly so. The tunnel is bet n mnk bet ween t wo ore bejtrinc rones, the contact on the nort h and the 1isure ou the south. Much of this e roseut tinii will be done as the shaft is being sent down. Much Cement Required. In the coucietMic; of the treat station twenty radwav cars of I t ah I'ort land ce-nent was usid, a ml this was rei 11 forced wit h .H'i tuna uf steel and iron, a lare portion por-tion of it such mat erial o: that kind as accumulates around a bi mine in the course of vears of operation. The arched roofs of the underground struct u ro were rein-forceil rein-forceil with railroad iron, a lare amount of which was used for that purpose. No little details hao been omitted in making the station as complete as possible. A short distance away is n tool sharpening station that will do nwav with the necessity of hauling tools two miles iuit to the mouth of the tunnel to be sharpened. The elevation above spa level at the month of the Alliance tunnel is 770P. feet and at the station a little lit-tle more, so met h iuu b lie t wenty -tid feet. The elevation above sea level at the month of the Silver K l n if sha ft . where t he boa rding house is located, i approximately vjtM feet. Yesterday snow was still 1 v i n n in heavy banks a ni o n g the onn if pinc on tho hillsides in the vicinity. That was t he only evidence evi-dence of win I er, however, as n carpet of softest i:reen covered all that port ion ot the count rv fret' from snow and the sun shone warm and bright. The location is n delightful de-lightful one at this season of the y ear. Ventilation Excellent. The ventilation of the station and tunnel is excellent, there not being the faintest suggestion ef foul atr. There are several open-inn open-inn reaching through to the sur-fnee, sur-fnee, and t hese c rr v st rong enr rents of air. ntVording the best possible ventilation. The pnrtv piloted through tho mine bv Superintendent .lames Humes consisted con-sisted of the following: Former Sen ntor Thomas Kearns, t'avid Keith, W. S. MrVninick, .lames Ivors, Movla'n Fox and Frank .lodge, directors of the company; F. F. Calvin. W. n. Ynnng, Walter James, Henry Welsh, Thomas I u pit , J nines I vers, Jr., J ohn T. (5 i b lions, F, O. Howard of the S.-ilt Fake Mining iJeview nnd a represent ntivo of The Tribune. Mr, (iibbonn is rt veiiiii; ma 11 connect ed with the Hn rriuian N a t in tin I ha 11 k in New York citv-, and 1 1 was his first trip underground in n metal mine. At o'clock tho party did ample justice to 1111 excellent meat nt the mine boarding Iiousa and the sluil for home wa made. |
