TBT-COM-H-113-A

How DNA-Blast Software canbring benefits in Vibration control

By Dr Thierry BERNARD

An extract from Thierry BERNARD paper presented An extract from Thierry BERNARD paper presented @ EFEE@ EFEE Conference, Conference, 1010--12 September 2003, Prague, Czech Republic12 September 2003, Prague, Czech Republic

TBT-COM-H-113-A

DNA-Blast Advanced Software for Vibration control

Lafarge Contes case study (Vibration control)

CONTENT

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DNADNA--BlastBlast

Advanced Software for Vibration control

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QUALITIR screen shotsDNA-Blast Software

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DNA-Blast SoftwareVibration optimisation process

InputSingle Hole Seismic record

Mathematical ProcessSeed wave simulationFrequency analysis

OutputIniation Sequence for

minimum vibrationFFT

BenefitsRegulation compliance

( ) ( ) dtx Ntj2etNX +

=

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Blast designadjustment

DNA-Blast SoftwareOptimisation process

Blast Seismic Trace

CHOIX DE LA CHARGE UNITAIRE

0

50

100

150

200

250

300

0 75 150

225

300

375

450

525

600

675

750

825

900

975

105011

2512

0012

7513

5014

2515

0015

7516

50

Distance (en m)

C

h

a

r

g

e

(

e

n

k

g

)

5.00

4.00

3.50

3.00

2.50

2.00

1.50

1.00

0.75

0.50

Vitesse

en mm/s

Charge Optimisation

Single Hole Trace

Drilling pattern

DNA Blast Engine

Objective selection

Delay Optimisation

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DNADNA--Blast Blast SoftwareSoftware

Lafarge Contes case study about Vibration control

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DNA-Blast SoftwareCase study : Lafarge Site

Lafarge quarry in the South of France

Located in Contes village20 km far from Nice

TBT-COM-H-113-A Usine de Contes

Carrire de Pont de Peille

LAFARGE

CIMENTS

DNA-Blast SoftwareCase study : Lafarge Site

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DNA-Blast SoftwareCase study : Lafarge Site

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DNA-Blast SoftwareCase study : Lafarge Site

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DNA-Blast SoftwareCase study : Typical production blast

Borehole diameter : 89 mmBench height : 10 & 19 mBurden 3 m / Spacing 3.5 m2 to 4 decks per holeAverage charge per delay : 19 kg

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DNA-Blast SoftwareCase study : Typical overburden blast

Borehole diameter : 89 mmBench height : 6 to 10 mBurden 3 m / Spacing 3.5 m2 to 3 decks per holeAverage charge per delay : 6 to 16 kg

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DNA-Blast SoftwareCase study : Vibration statement

PPV evolutionImportant reduction through years

PPV / Years

R2 = 0.2951

91 92 92 93 94 95 96 97 98 99 00 01 02

P

P

V

(

m

m

/

s

)

Average PPV Divided by 6

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DNA-Blast Software Case study : Complains history

PPV

Complains

100 %

1991

PPV

Complains

70 %

1992

PPV

Complains

30 %

1994

PPVC

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In 2002, there is only one or two complaining phone call per year

DNA-Blast Software Case study : Vibration history vs Complains

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DNA-Blast Software Case study:Vibration history vs Initiation systems

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DNA-Blast Software Case study : Charge per Delay Optimisation

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Electronic Detonators UsedDELTADET system

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DNA-Blast Software CONCLUSION

DNA-Blast software gives the following benefits to lafarge:Decrease PPV by 6 that suppressed

neighbours complains about vibrations and consequently allowed Lafarge to extend the site

Optimise the use of electronic detonators that allowed to increase the charge per delay and gave to Lafarge a cheapper cost per ton.

TBT-COM-H-113-A

Advanced Softwarefor

a Million Dollar Benefit

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