Laserfiche WebLink
r~ <br />u <br />lJ <br />raBLE z.os.3(b)(a)-~ <br />AIR-BLAST LIMITS <br />Low-Frequency Limit of Measuring Maximum Level <br />System, in Hz (±3dB) in d6 <br />0.1 Hz or lower -Flat response 134 peak <br />2 Hz or lower -Flat response 133 peak <br />6 Hz or lower -Flat response 129 peak <br />C -Weighted, Slow response 105 C <br />New Horizon Mine seismographs record at the 2Hz or lower level. <br />MAXIMUM PEAK PARTICLE VELOCITY LIMITS <br />Distance (D) Maximum Allowable Scaled-Distance <br />from the Blasting Site Peak Particle Factor to be <br />(in feet) Velocity (V max) Applied without <br />for Ground Vibration Seismic Monitoring <br />(In inches/second +) (Ds++) <br />0-300 1.25 50 <br />301 to 5000 1.00 55 <br />5001 and beyond 0.75 65 <br />+ Ground velocity shall be measured as the particle velocity. Peak particle velocity shall be <br />recorded in three mutually perpendicular directions from the blasting site. The maximum peak <br />particle velocity shall be the largest of any of the three measurements. <br />++ Applicable to the scaled-distance equation of paragraph 4.08.4(10)(c)(i) W=(D/Ds )2 <br />(Revised July 2006) <br />2.05.3(6)(a)-14 <br />