Oil and Gas Industry in Malaysia - Institution of Engineers Malaysia
Oil and Gas Industry in Malaysia - Institution of Engineers Malaysia
Oil and Gas Industry in Malaysia - Institution of Engineers Malaysia
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FEATURE<br />
ensure that they are<br />
approved by the authorities<br />
only to f<strong>in</strong>d out later they<br />
are unsuitable for the<br />
location <strong>and</strong> are very<br />
expensive to comply. While<br />
the Australian St<strong>and</strong>ard<br />
limit <strong>of</strong> 10 mm/sec for<br />
vibration <strong>and</strong> 120 dB(L) for<br />
airblast are applicable for<br />
most cases, <strong>in</strong> some<br />
circumstances a lower or<br />
even higher limit may be<br />
considered appropriate. It<br />
is therefore essential that<br />
the specifications proposed<br />
for implementation must<br />
be appropriate <strong>and</strong><br />
practical for the location<br />
chosen to avoid problems<br />
<strong>of</strong> cost overrun <strong>and</strong> the<br />
need to appeal to the<br />
authorities to modify the<br />
specification later.<br />
It is quite common <strong>in</strong><br />
<strong>Malaysia</strong> where consultants<br />
are hired only to write<br />
the blast specification when<br />
the authorities request a<br />
method <strong>of</strong> statement to<br />
be written, but after that<br />
he is not required by<br />
the project owner or<br />
blast<strong>in</strong>g contractor to<br />
oversee <strong>and</strong> supervise the<br />
job to save cost.<br />
One very important<br />
requirement <strong>in</strong> blast<br />
specification is the need to<br />
record the blast<strong>in</strong>g work<br />
correctly. The blast design<br />
must be clearly recorded.<br />
Burden, spac<strong>in</strong>g, depth,<br />
blast<strong>in</strong>g location, explosive<br />
used <strong>and</strong> the protection<br />
methods to control flyrock<br />
must be recorded <strong>and</strong><br />
shown on the plan. Videos<br />
or photographs <strong>of</strong> blast<strong>in</strong>g<br />
work must be taken.<br />
Vibration <strong>and</strong> airblast<br />
monitor<strong>in</strong>g programs must<br />
be implemented <strong>and</strong><br />
recorded correctly to check<br />
compliance. This is actually<br />
a necessity to protect the<br />
owner from possible<br />
compla<strong>in</strong>ts from the<br />
public <strong>and</strong> as support<strong>in</strong>g<br />
documents <strong>in</strong> discussion<br />
with the authorities dur<strong>in</strong>g<br />
their rout<strong>in</strong>e <strong>in</strong>spection<br />
work <strong>and</strong> also <strong>in</strong> case <strong>of</strong><br />
litigation <strong>in</strong> court.<br />
F<strong>in</strong>ally, the most<br />
important element <strong>in</strong><br />
controlled blast<strong>in</strong>g is public<br />
relations. The blaster, the<br />
project manager, the<br />
owner <strong>and</strong> also the<br />
eng<strong>in</strong>eer must develop<br />
good relations with the<br />
neighbours, keep them<br />
<strong>in</strong>formed <strong>of</strong> the development<br />
<strong>and</strong> show to them<br />
that we care about their<br />
safety <strong>and</strong> well-be<strong>in</strong>g.<br />
Make them feel safe.<br />
They will also make<br />
you feel safe.<br />
CONCLUSION<br />
Blast<strong>in</strong>g work is actually<br />
very safe if performed by<br />
competent <strong>and</strong> qualified<br />
people. It is also much<br />
cheaper <strong>and</strong> faster<br />
compared to rock break<strong>in</strong>g<br />
by mechanical <strong>and</strong><br />
chemical means. However,<br />
the blasters <strong>and</strong> the<br />
eng<strong>in</strong>eers must be will<strong>in</strong>g<br />
to improve their<br />
knowledge <strong>of</strong> blast<strong>in</strong>g<br />
work <strong>and</strong> prove that they<br />
can do so pr<strong>of</strong>itably <strong>and</strong><br />
safely <strong>and</strong> m<strong>in</strong>imise<br />
disturbance to the public.<br />
They must also be<br />
knowledgeable <strong>in</strong> the effect<br />
<strong>of</strong> blast<strong>in</strong>g work to nearby<br />
structures <strong>and</strong> underst<strong>and</strong><br />
the psychological effect <strong>of</strong><br />
blast<strong>in</strong>g on the public.<br />
Many blast<strong>in</strong>g works have<br />
been completed safely <strong>and</strong><br />
successfully <strong>in</strong> the past <strong>and</strong><br />
will cont<strong>in</strong>ue to be so <strong>in</strong><br />
the future. Blast<strong>in</strong>g can be<br />
very satisfy<strong>in</strong>g when it is<br />
well done. ■<br />
JURUTERA, JANUARY 2005 32