The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1913-10-23
THE SUCCESS.



i From the 700-foot level, which Is
driven in from the back OF the mill
near the creek bottom, a SHAFT mas
been sunk on the main ore body 900
feet deep. lhs Is equipped with an
electricaly driven hoist and one level
! has been opened and stepiig COM
lnenceu from station 1bV feet deep
below The tunnel level. This deposit
occurs in marrow belt Of Pricnara
slate which is Durdereu on either side
by the eruptive granite Or monazite
Ior nich Inns district IS noted.
The eruptive rock seems to be lat
en- than the ore by reason 81 the fact
that branches Of the clean eruptive
are found 20 be penetrating the orr
body and the ore seems 10 De deln-
tie replacement Of the slaty formation
which shows numerous black lines
and general characteristics Of the Pri-
chara formations with the exception
that apparently as a result OF the IN
lrusion, this formation ana Its con-.
tanned ore bodies have been subject
to a secondary silicitication which has
cemented the ore and enclosing rock
into tight anonymous mass, with
hardly any wall cleayages.
Like all the Nine Mile deposits SO
far opened, the Success ore shoot Is
steeply pitching deposit, varying
about 10 degrees from the vertical
The properly was formerly operated
as a lead-silv mine under the name
of the Granite, and made quite an i'm
portant production in the early days
Of the district, but remained idle fpl
quite number Of years by reason OF
its refractory nature, until reopened
by the present owner, Fl. f. Sanuels.
to whom great deal OF credit is due
for the revival of interest in the Nine
Mile section. He undertook this pro-
position when zinc had very little
value, but managed to make 1t pay on
its limited lead-silver resource, and
when the zinc market strengthened
he was In shape to take advantage Of
ii and turn the deposit to very prof
liable account
/ Success Method Of Holding Ground.
Most of the big ore bodies of the
Occur d'Aenes are timbered by the
square set method, with a moditica-
ton in the collar braces or girts and
an excessive increase in the cap tim
bers by reason of the side pressure OF
A the walls which has to be taken care
lof. In addition to this massive tim
bering which is generally employed In
the sleeper pitching assures, the
slopes are usually close filled with
/ waste.
| The Success mine, In sharp contras.
! with the other principal ore producers
of the district, is worked by the
shrinkage method. to which it's ore
deposits and enclosing formations are
especially adapted by reason of the
hardness of the gangue and the ex-
IRENE toughness OF the walls. BY this
! method, level IL opened and a back
pillar left to protect it in place Of
timber. With the exception of shoots
and manWays, these are driven
through the back pillar in the best
ore spaces where convenient and the
leaner spaces Of the ore body are left
for this pillar These pillars are
about ten feet through. A second
drift is then driven, cutting out the
full section of the ore body and its
full length and continued up as a
stope and the broken ore is gradually
drawn off through the chutes with the
result that the miners are kept up to
the back on the broken orea filed
stope. After. the stope Is carried up
to within 10 feet of the level sabove.
the remaining bottom is left in 10 sup
port the drift, if it is needed, or if
entirely through with thatxS1art of the
mine, it can be blasted out by reued =
ing ,lnderhand work. BY this method
very little tinbering is required and
by substantial manways maintained
through the ore filled slopes the back
is always accessible to the miners and
within easy reach with very little
staging.
Ore Mined in Old Workings.
The property was Quilted of its rich
err surface lead ores when the present
management took it over but the for
mer operators religiously avoided all
the zinc and iron values they could,
which permitted the old slopes to be
remined to two and three times their
former width They have produced a
large amount of ore. The property
has now been in steady operation for
several years, producing $50 tons per
day and shipping from 1900 tn 1900
tons of concentrates a month. The
mine has $4,000 tons of broken ore in
the slopes at this date, and 1t makes 4
product of from 40 to AZ per cent zinc
concentrates and S. per cent lead con
centrates carrying 80 ounces silver
per ton
In addition to the zinc and lea
values, this ore deposit carries an eX-
cess of iron sulphide and for the pur-
pose of further eliminating this and
raising the zinc values, additional ma
CIl1UfIN rs uuW utlJS d'iNsu w ttt
plant, including an electrical separat-
ing device which it is believed viii
give much more satisfactory results.
4 The bottom Of the shaft Is out Of
the vein but the new level opened at
$50 feet shows the longest and most
consistent ore shoot that has heen
opened in the history of the property.
Extent OF Ore Bodies.
The ore occurrence Is peculiar and
consists Of one controlling assure
course. with tight walls carrying a
main line of naturalization several
hundred feet long, but the commercial
ore bodies have been confined ID a
nearly vertical channel that is rough
~ crescent shaped with two nearly
parallel or overlapping ore bodies
forming slopes that are from 80 to
100 feet long and from to 80 feet
wide in their widest swells. The new
Slope In the shaft level is 265 feet
long and Z to 40 feet wide, with a
strong ore showing still going east on
the sill floor Very little crosscutting
has been done at this new level and
the Indications are that when more
fully developed the deposit is going
to show its largest mineral resources
at this deeper level and promises 10
far exceed in tonnage capacity in the
production Of its upper horizons.
The output Of this mine is in about