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BlastingSUSANA DAZ M

LEARNING 2

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Objectives: Octobe 2 n!To Introduce the concept of blasting.

To identify vocabulary related toblasting"

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#e$%o!s To blast

Rock Blasting

pyrotechnics

Detonator

Explosive

Explosion

Open pit Mining

nderground !ining

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De&nition To blast" blo# up or break apart $so!ething solid%

#ith explosives.

Rock blasting" Is the controlled use of explosives

and other !ethods such as gas pressure blasting

$gas explosivo co!pri!ido%& pyrotechnics

processes& to excavate& break do#n or re!ove

rock. In !ining& the result of rock blasting is oftenkno#n as a rock cut.

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'yrotechnics $pirotecnia%" science of using!aterials $pyrotechnics ele!ents% for the

production of heat& light& gas& s!oke and(or sound.

Detonator" It is a device& as a percussion cap& usedto !ake another substance explode.

Explosive" It is a reactive substance that contains a

great a!ount of potential energy that can producean explosion.

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Explosion" ) release $liberaci*n% of !echanical&

che!ical& or nuclear energy in a violent !anner

#ith the generation of high te!perature and

usually #ith the release of gases.

Open+pit !ining" It is a surface !ining techni,ue

of extracting rock or !inerals fro! the earth by

their re!oval fro! an open pit.

nderground !ining consists of digging tunnels or

shafts into the earth to reach !ineral deposits.

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Revie%ing

'o BlastRoc( Blasting

)$otec*nicsDetonato

E+,losive

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E+,losion

O,en ,it -ining

Un!ego.n! Mining

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Blasting into!.ction Blasting is an essential part of the !ining cycle.

In all for!s of !ining the rock is broken by

drilling and blasting the rock.

Blasting technology is the process of fracturing!aterial by the use of a calculated a!ount of

explosive.

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-ood blast design and execution are essential tosuccessful !ining operations.

I!proper or poor practices in blasting can have a

severely negative i!pact on the econo!ics of a !ine.

The use of excessive explosives at a !ine site can result

in da!ages to the rock structures and large increases in

support costs $au!ento en los costos de operaci*n%.

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Blasting in O,en )it an!Un!ego.n! Mining Blasting is used in both open pit and underground

!ining operations.

hile traditional blasting utili/ed black po#der

and dyna!ite& there are !any different types of

explosives used today.

0o!!on explosives used in industry no# are

)12O $a!!oniu! nitrate(fuel oil%.

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AN/O )ill

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Main /actosMany factors are taken into account #hen

deter!ining #hat type of blast design or explosive

#ill be used"

Rock type.

Density.

Rock strength $Dure/a de roca%.

2racture condition of the rock $no todas las rocas se

fracturan de igual for!a%.