Permeability Monitoring Technique of the Near-Field and Far-Field Interface of Underground Openings
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PERMEABILITY MONITORING TECHNIQUE (F THE NEAR-FIELD AND FAR-FIELD INTERFACE (F
UNDERGROUND OPENINGS
ALEXANDER T. JAKUBICKt AND VICTOR DE KOROMPAYtT tOntario Hydro, 800 Kipling Ave., Toronto, M8Z 5S4; tt119 Angell Ave., Beaconsfield, Quebec, H9W 4V6, Canada INTRODUCTION In
July/August
1981
and February/March
from water-bearing
analysis
fractures
1982
we
sampled
of two mines in
water
for
Elliot Lake.
isotope
Permission
for sampling was given to Ontario Hydro by Denison Mines Ltd and Rio Algom Ltd, 8 Quirke Mine in conjunction with the CANMET Mine Safety Tests. The purpose of the
investigation
water present
in
the
of
far-field
was to
find out whether there is
some fractures the mine.
a relationship between
in a deep mine and the
The
investigation
was
the
shallow groundwater
done in
co-operation
in
with
University of Waterloo. The
results of the analyses
notation and
refer to
standard
2
H contents are
expressed as the
M1 0
(Figure 1). The 1b0 and deuterium the same range as estimated for the Sudbury area by P. Fritz. 1
are in
contents
the
for 180 and
Compared to the
global meteoric
SMOW*
water line,
the
samples
taken in
the
Denison
Mine and Rio Algom Mine have an isotope composition close to precipitation and shallow
groundwater.
They have,
however,
surface water samples of the area. of
the
meteoric waterline.
brackish,
high
2H content,
local meteoric water.
2
lower
Thus
it
could
be speculated
deep
groundwater
which
The high salinity of mine
this
theory.
zone
changed with time it
As the isotope
180 and
Also the mine water is
this is
than
that
the
water
was highly diluted
in
the
slightly to the left
water (see Table
composition of the water
was assumed that
2H content
is
a
by the
1) supports
the near excavation
the place where the mixing
occurs. Therefore, the
deeper
through No.
the
conclusion
workings
of
can be
the mine.
the Quirke Lake overthrust
I and No.
2.
Below the fault
made
that
shallow groundwater
A hydrogeologically which intersects the
water
is
fracture systems where mixing with deep groundwater
* SMOW = Standard Mean Ocean Water
possible
is
entering
pathway
is
Denison Mine between shaft probably occurs.
conducted
by local
580 20 GLOBAL METEORIC WATER LINE 6 2H ( 8 618 0 , 10)%o/. - 40QUIRKE LAKE SERPENT RIVER • AUGUST
-60--•
FEBRUARY
itFG
DENISON MINE 610 m
NO1LE
1 CV~3 .1-
pH
al-
3
OPRIO
2
2
NTHS3IES
OF CHMI0
,,,
WA
IT(2
COPSTO0.2UFC
APIN
34ICT
5180
208
5B1E a
RO
VLE 9.30AN
9 .3
pH
Ca2+
1
4210
RO AsCCTUEO
CaCTR
COPAION2
Nl-Ha
518 m
ALGOM QUIRKE MINE
AND MINE WATER(RIO
0
OUS
WTR(EPETRVR
IEAFE
RS.
UFC6.7TRSAPE
22
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