DIVISION: Blanket Mine

haddockhellskitchenUrban and Civil

Nov 15, 2013 (3 years and 6 months ago)

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DIVISION:




Blanket Mine

DEPARTMENT:



Technical Services

SECTION:




Survey

JOB TITLE:




Installation of Side grades
Underground

PREPARED BY:

N. Sithole


DATE:
28
-
12
-
2005

APPROV
ED BY:



DATE:

CHECKED BY: SHE


DATE:

REVIEWED BY: N. SITHOLE

DATE:

27
-
08
-
2008

TASK

PROCEDURE

HAZARD

CONTROL

Installation of Side
grades
Underground

1
-

Before proceeding underground ensure that you have

the recommended Proper Protective Equipment (P.P.E.)

-

Falling objects

-
Rough floors

-
Rough surfaces

-
Darkness

-
Noise abo
ve the required
standard

-
Open stopes

-
Hard hat

-
Gumboots

-
Overalls

-
Cap lamp

-
Ear plugs/muffs


-
Safety belt with a life line.



2
-

Mark the positions on the side walls were the grades will
be installed.

-
Bad hangings or cracks



-
Liaise with the miner or

gang
leader in
-
charge to dislodge the
hangings and make the area safe
.


3
-
Hang a bob tape vertically on a peg with a known
elevation, which is near the position were the side grade pegs
will be installed.


-
Same as above
.

-
Same as above


4
-
Set the tripo
d and instrument at a point visible to both the
hanged bob tape and the position were the side grade pegs
will be installed.


-
Tripod and instrument
falling on the ground.

-
Tripod stand legs to be firmly
secured into the ground.

-
Instrument to be tightly s
crewed
on the tripod.


5
-
C
alculate

the elevation of the 1
st

set of grades based
on the
distance and the grade elevation from the previous grade
pegs.

-
Set the level machine at a collimation (chain) of the 1
st

set
grade elevation using the hanging bob tape
.

-
Sight on the sidewalls and mark the points were the grade
pegs will be installed on the same level.

-
The 1
st

set of grade pegs should be in line with the main
pegs across the haulage.

-
Same as above

-
Same as above


6
-
Measure

2.5m from the 1
st

set and m
ark the positions of
the 2
nd

set of grades.

-
At a gradient of
+1: 400,
calculate the rise in elevation of
the 2
nd

set of grades

to be installed at 2.5m from the 1
st

set,
which is +0.006m.

-
Set the instrument at the 2
nd

set grade collimation and mark
the po
sitions of the holes to be drilled.

-
Bad hangings on the
positions were the grades
will be drilled

-
Bar down and make the
area safe


7
-
Liaise with miner or gang leader in
-
charge for the drilling
of the 10cm in depth and 5cm diameter holes.

-
Two holes for
the 1
st

set and 2 holes for the 2
nd

set of grades
to

be

drilled.

-
Noise from the drilling
machine.

-
Loose rocks falling from
the drilling.

-
Wear Ear plugs/muffs


-
Safety goggles and gumboots.


8
-
Insert wooden blocks into the holes using a 4lb hammer.

-
Chi
ps of rocks

-
Hard hat, safety goggles and
gloves


9
-
Using the Automatic level, direct the assistant where to
insert the spads on the wooden blocks using the 4lb hammer.






10
-
After hammering the spads in the blocks re
-
check if they
are inserted in the
correct positions (elevation).






Minimum Qualifications:
-

National Diploma in Mine Survey




In house trained Survey Technician
, with 1 year experience