GEAX
s.r.l
Chapter 6
OPERATING THE DRILLING RIG
7
6.3.3
Operations forbidden when drilling a borehole
During actual drilling (tool rotating) it is strictly forbidden:
•
to move the rig by switching selector
D5
•
to rotate the pivot cab
•
to modify the mast’s vertical alignment, especially when the mast rests
on the ground.
The mast’s alignment should not be changed even during pauses as this
would compromise the straightness of the borehole and/or make it difficult to
pull out the tool.
6.3.4
Borehole drilling precautions
During the operations described in par. 6.3.1, care
should be taken that no one comes close to rig’s work
area. Should this occur, halt operations until safety
conditions are restored. When unloading the excavated
material, the tool must not rotate, and the operator must use a suitable tool
(e.g. shovel).
6.4 Operation of auxiliary winch
6.4.1
Operation and limitations of use of auxiliary winch
In order to use the winch you must first unlock the safety
catch (lever next to the pedal), loosen the wire rope and
unhook it from eyebolt B. Stepping down on the front part of
rocker pedal P4 makes the rope come down, while stepping on the back part
of the pedal makes the rope go up. Loads should be lifted vertically or with a
deviation from the vertical of no more than 20° (see
figure 6.4.1.1
. Furthermore,
for safety reasons, the rope should not be used outside the area shown in
figure 6.4.1.2
(the allowable work area is shaded in the figure), in order to
prevent the ho
ok from going out of the operator’s field of vision or exceeding
the limit of 20° from the vertical.
Hoisting or dragging loads at higher angles can create overturning forces that
can be hazardous for the drilling rig's stability.