Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XV - Office of Conservation-Surface Mining
Subpart 5 - Permanent Program Performance Standards
Chapter 53 - Permanent Program Performance Standards: Surface Mining Activities
Section XV-5361 - Use of Explosives: Control of Adverse Effects
Current through Register Vol. 50, No. 9, September 20, 2024
A. General Requirements. Blasting shall be conducted to prevent injury to persons, damage to public or private property outside the permit area, adverse impacts on any underground mine, and change in the course, channel or availability of surface water or ground water outside the permit area.
B. Airblast
Lower Frequency Limit of Measuring System, in Hz (+/- 3 dB) |
Maximum Level (in dB) |
0.1 Hz or lower-flat response 1 |
134 peak |
2 Hz or lower-flat response |
133 peak |
6 Hz or lower-flat response |
129 peak |
C-weighted-slow response n 1 |
105 peak dBC |
1 Only when approved by the office.
C. Flyrock. Flyrock traveling in the air or along the ground shall not be cast from the blasting site:
D. Ground Vibration
Distance (D) from the Blasting Site, in Feet |
Maximum Allowable Peak Particle Velocity (V max) for Ground Vibration, in Inches/Second 1 |
Scaled Distance Factor to be Applied without Seismic Monitoring 2 (Ds) |
0 to 300 |
1.25 |
50 |
301 to 5,000 |
1.00 |
55 |
5,001 and beyond |
0.75 |
65 |
1 Ground vibration shall be measured as the particle velocity. Particle velocity shall be recorded in three mutually perpendicular directions. The maximum allowable peak particle velocity shall apply to each of the three measurements.
2 Applicable to the scaled-distance equation of §5361. D.3 a
Figure 1. Alternative Blasting Level Criteria
(Source: Modified from Figure B-1, Bureau of Mines R18507)
E. The maximum airblast and ground-vibration standards of §5361. B and D shall not apply at the following locations:
AUTHORITY NOTE: Promulgated in accordance with R.S. 30:901-932.