2 ground vibration prediction6.30.8

7/29/2019 2 Ground Vibration Prediction6.30.8

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LBS DIST (SD .5) (PPV)

3200 2300 40.65864 1.568779

3200 2300 40.65864 0.426221

13 108 15 3.177381

1000 1200 15 0.315112

13 187 51.86447 1.091349

310 950 53.95637 0.561901

310 950 53.95637 0.211731

DIST 1 DIST 2 PPV 1 PPV 2

45 121 1.1 0.244592

50 573 2.8 0.056554

450 1050 0.4 0.127436

In all cases enter your values (under the bolded labels) over the sample values

LBS Maximum amount of explosives per delay in pounds.

DIST Distance to the point of concern.

SD^.5 Square root (.5) scaled distance.

PPV Predicted peak particle velocity.

DIST 1 Distance to the point of the known peak particle velocity.

DIST 2 Distance to the point of the point of concern.

PPV 1 The known peak particle velocity measurement.

PPV 2

DISP

PPV SD^.5

4 21.96442

4 9.319644

4 12.98964

4 3.064393

4 23.03083

4 13.01253

0.75 21.63835

Unusually High Confinement Oriard (Cons

Upper Bounds RI 8507 (Bituminous Coal

Mean Line RI 8507 (Bituminous Coal Mine

degree of certainty that the ground vibration travel path to DIST 2 is similar to that of DIST 1.

Bituminous Coal Mines

Construction Blasting

Quarry Blasting

Enter data in the fields under the bolded labels (LBS, DIST-DIST 1, DIST 2, PPV 1, PPV below) to


Upper Bounds Oriard (Construction Worst

Lower Bounds Oriard (Construction Best

Upper Bounds BU 656 (Quarry Production

Average BU 656 (Quarry Production Blasts

bolded (SD^2, PPV, PPV 2, and SD^2 below). Note: Only solve for PPV 2 if you have a reasonab

The peak particle velocity at the point of concern.





Ground displacement, the actual amount of ground movement.


Average BU 656 (Quarry Production Blasts


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0.75 28.55365

SD^.5 PPV

90 0.468841

36 0.512823

90 0.180729

10 0.602853

50 1.157187

90 0.277348

20 0.832879 Average BU 656 (Quarry Production Blasts

29 0.731616 Construction Average (taken from Oriard)

PPV FQ DISP

0.753 14.3 0.008381

PPV FQ ACC/g's

0.75 75 0.915622

ACC/g's FQ PPV

0.2 9 1.365193

ACC/g's PPV FQ

0.91 0.75 74.53951





Construction Average (taken from Oriard)

of .003. A displacement of .00315 is 5% over the limit.

over .00840 it is more than 5% over and is clearly a violation. Enforcement actions for displace

Note: The above table is applicable only at frequencies over 9.9472 (9.95) and PPV's up to 2.0.

9.9466 (9.95) is 0.50. A PPV 5% over 0.50 is 0.525. At very low frequencies, below 2.65 (possible

If ppv/frequency is on or slightly above the Z-curve graph it is important to know if it is over the




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!!

ruction, i.e. Trenching With low PF)

ines Worst Case)

Average)

solve for values under the labels not


Case-Not Highly Confined)

ase Lightly Confined)

Blasts Worst Case)

Average)

le


ines Worst Case)

Average)


Blasts Worst Case)

Average)


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Average)

Blasts Worst Case)

ines Worst Case)

Average)


ents over .008 but under .00840 are at your discretion.

The limit at frequencies from 2.6526 (2.65) to

but highly unlikely), the limit is a displacement

line or to know or how far over. If the displacement is



2 ground vibration prediction6.30.8

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