... weight blast vibration particle velocity geology blast design parameter upstream oil & gas metals & mining ppv design parameter explosive charge united states government charge element calculation point waveform reservoir characterization fragmentation yang effective charge...

... element fragmentation charge weight blasthole strain change design parameter kinematic approach ppv application rock mass highwall yang vibration ARMA 21 12 A Kinematic Approach for Blast Modeling Yang, R. Orica Limited, Watkins, CO, USA Copyright 2021 ARMA, American Rock Mechanics...

.... Figure 5 displays the PPV vs. the minimum charge weight scaled distance (Yang, 2007) obtained from the monitoring. As it can be seen, there are two data points the PPV s of which exceed 254 mm/s. If a geophone would be used, these two data points would be measured as the saturated PPV of geophones i.e...

... 10 Hz. Reservoir Characterization metals & mining Artificial Intelligence Upstream Oil & Gas frequency vibration amplitude Thickness single-charge blast blast design blast vibration propagation array charge weight vibration record interference production blast siskind...

... of the charge size. Therefore, measurements of different blasts with different charge sizes taken at various distances should be scaled to the equivalent distance, called a scaled distance, which is the actual distance divided by the cube-root of charge weight. Similar results were obtained by later...

... (confined) and delayed shots. The preferred scaling factor operating on charge weight per delay is n = 1/3. BACKGROUND AND INTRODUCTION The careful synopsis by Nicholls, et al, (1971) of findings in the previous two decades (e.g., Crandell, 1949; Langefors et al, 1958; Edwards and Northwood, 1960...

... contain canisters of Ammonium nitrate positioned at various depths, or a slurry explosive with detonators positioned along its length (See Figure 1). The depth and width of the array, the spacing of shot holes, the spacing of detonators, the degree of containment, and the charge weight are the variables...