The Calumet news. [volume] (Calumet, Mich.) 1907-1938, 1910-09-06
DEVELOPMENT AT
miami Is BRISK
WORK BEING DONE is PREPAR-
AToRY TO THE OPENING UP
OF THE HUGE NEW CON-
GENERATOR

Work at the Miami mine under
ground is entirely as yet of a develop
mont nature and is being concentrat-
ed in preparing the necessary drifts
for hauling purposes.
1t is of course indefinite at the pres
ent time just how many million tons
of ore can be extracted through the
main shaft as the original calcula-
tions of three or four million tons of
ore in this vicinity have been greatly
added to and future development
alone will reveal them, says the
Globe Silver Belt. on the original
plan of the 42O haulage level the ore
body was more or less circular in
shape with an intervening tonnage
of barren shist practically dividing
the block in two. Under recent de-
Velopment this tongue of barren rock
has been cut up and exploited further
with the consequence that most of it
has proved TO be valuable ore. Fur
Their than this, what were supposed to
be the westerly limits of this circular
Snapped ore body have been greatly
extended by further development and
churn drilling. This great body of adj
ditional ore will be left as it is until
the mine is in the stage of develop
ment and then the 429 level will be
completely blocked out I'm the new
direction.
Considering again the original cir
cular shaped ore body approximately
500 feet i'm diameter. the development
at present is being done i'm the south
western quarter and it is here that
the first breaking of ore will take
place The center of the first quar-
ter is in the neighborhood of 500 feet
west OF the main shaft at the mill,
and contains approximately 100000
tons Of ore. on the 42O level as
blocked out today and as revealed by
Churn drilling. there are 100000 tons
Of ore. The mill for the first few
months OF its life will be equipped TO
run 1900 tons of ore a day. This
ore will in all probability be drawn
from the stock pile at No. shaft.
There are about 100000 tons OF this
ore which of course is already broken.
The method OF handling il will be
20 raise from the 420 haulage level,
draw it through this raise to the 42O
level and haul It by electric power 10
the shaft where it win be hoisted to
the mill bins. There are being two
raises pushed up under this pile now,
one an incline and another a vertical
raise through both or which the ore
will be drawn. The possibility OF the
ore. as il is drawn through these
raises, wedging and clogging up the
chutes Will be practically obviated by
virtue Of the fact that the ore body
at Miami is so cut up into vertical
sections that at every twenty-five feet
along these raises access may be had
and any difficulty along those lines
easily obviated. 4 twenty cubic foot
car OF the Miami ore, that is a COM
monty termed one ton car will hold
I'm the neighborhood of 1900 pounds
After the stock pile has been dispos-
ed Of the first broken ore will come
from the stones fifty feet above the
42O haulage level. The method OF
mining would uecessitate the eXtrac-
tion OF the ore from the rooms which
are each sixty-five feet I'm width and
fifty or one hundred feet long, before
the thirty-five foot pillars are touched.
The first fifty feet above the 42O level
is 20 be left intact for the present for
purposes of protection and will be the
last ore extracted from that level.
n. .. Latyton. superintendent OF the
mine has just returned from a trip to
Michigan.