Show t Mining News i 1 1 Shipments-Sales Shipments H 1101 1 t u I i 1 H i iThe The New Park Mining company at Keetley Utah Clark L L. Wilson super super- recently completed sinking ng operations In the main shaft abaft of the thA Mayflower mine The Boskovich muck- muck er er r a new mechanical mucking machine was used and this first experimental model has haa proved to be an important Addition to modern mining methods Tho The principle of this Is a power shovel dipper suspended bt below belowa low lowa a L mine cage The cage has room forthe for the ho operator and the air hoists needed to a operate the mechanism The swinging swing awing swinging ing motion of the dipper through a 1 amuck amuck muck pile Is provided by two air hoists using cables strung over sheave wheels wheel situated at the ends of the tho shaft sea sec sec- ion Crowding action of the tho dipper to penetrate a muck pile is provided by an anair anair anair air piston mounted on a horizontal bar suspended below the the- cage Horizontal motion of the piston across the short suspension of the shaft to efficiently clean lean the bottom Is provided by a third air hoist and necessary cables The vertical position of the machine and cage ago with reference to a muck pile Is controlled by a fourth air hoist that permits the to be bo hoisted boasted in a shaft compartment during blasting Use of ot the machine doubled the speed of mucking shaft rounds shortened the time required to timber and eliminated ed the need for staging In drilling station stalon sta- sta tion lon Ion openings Elimination of hand mucking had a favorable psychological I affect on the crew as well as saving physical effort for other phases of the shaft sinking cycle The machine was constructed to operate Inside timber and when used this way reduced the hazard of of falling slabs resulting from too o much open ground The time involved In Involved Involved In- In in placing the machine in position position tion lon to muck was negligible A comparison of performance records before and after Installation of the tho machine Indicates an n overall Increase from rom to of ot a foot toot advance per worked Buckets mucked per I increased 70 per cent Man Man- shifts required to Install one ona shaft set decreased 23 per cent I The sinking crew consisted of a shaft foreman oreman foreman eight miners two of whom were lead men for the two shift operation op operation operation op- op two one mechanic and two part time pump men A grizzly grizzly griz grin sly tender was also assigned part timeto time timeto to the tho shaft The shaft operated on two shifts that coincided with those in the mine The Tho Thomine mine production was hoisted through the he main shaft and at times unavoidably unavoidably unavoidably ably hampered progress in sinking A shaft round could be blasted only atthe at aV the end of a shift as fumes passed through the mine workings This occasionally occasionally oc occasionally oc- oc caused delay In the cycle of work The hours of actual work in the shaft bottom were also limited as transportation in and out of the tunnel tunnel tunnel tun tun- nel time for lowering and and hoisting men lunch time and taking five were I all alt deducted from the eight hour por- por to tal-to-portal shift The sinking operation also Included excavation of cubic feet of rock at stations and skip pocket openings This work Is not Included in the shaft cost analysis analysts Milan N N. N Boskovich of Midvale Utah supervised the sinking as aa shaft foreman foreman foreman fore fore- man and contracted to provide mine labor at a flat fee per foot of shaft ad ad- vance The New Park Mining company company company com com- pany provided all material and supplies supplies sup sup- plies and also service labor including holstman mechanic and grizzly tender Mr Boskovich had previously pre pre- previously Contracted Mayflower shaft sinking and aid was Interested In using a mechanical shaft mucking machine of his design This machine was built by the New Park Mining company at atthe atthe atthe the shops of the Mayflower mine The The Mining Record Denver Colorado I SHIPMENTS New ew Park l Park Utah Keetley 1210 Silver liver King Coalition cons Park ark Park Utah Consolidated Total STOCK TOCK SALES THURSDAY East Utah at 2900 at New Park 1600 at at Park City Consolidated at New York York Exchange Exchange Park Utah at Silver SUver King Coalition at FRIDAY East Utah at Ole 50 at 1300 at New Park at 1700 at 1424 New York Exchange i New Park at Park Utah 2200 2290 at Silver SUver King Coalition at SATURDAY East Utah lush 1000 at at at I New York Exchange New Park at Silver SUver King Coalition at a MONDAY East Utah at COc New Park at 1472 2 at New York Exchange New Park at Park Utah at 2121 Silver SUver King Coalition 1000 at lit WEDNESDAY East Utah at New Park nt at Silver Sliver King Co Coalition ditton at 4 00 New York Exchange Park Utah at Silver King Coalition at |