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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

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