HR: 0830h
AN: U31B-0004    [PDF]
TI: Seismo-Acoustic Observations near explosion sources in a Copper Mine
AU: * Stump, B
EM: bstump@smu.edu
AF: Department of Geosciences Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395 United States
AU: Hayward, C T
EM: hayward@smu.edu
AF: Department of Geosciences Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395 United States
AU: McKenna, S M
EM: mihanmckenna@hotmail.com
AF: Department of Geosciences Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395 United States
AU: Zhou, R
EM: zhou@passion.isem.smu.edu
AF: Department of Geosciences Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395 United States
AB: For the last two years, Southern Methodist University has sporadically operated a network of 5 seismo-acoustic gauges on the perimeter of a copper mine recording seismic and acoustic signals from production mining blasts. The longest continuous data section, 180 days, provides an interesting comparison of seismic and acoustic waveforms from the mine. With typical delay fired seismic events, sometimes consisting of multiple patterns fired at once, only the first arrival (P) is clearly detected. Acoustic arrivals provide a second phase helpful in determining rough distances to the shots and allowing single station distance corrections. Seismic waveforms from delay fired patterns and multiple patterns are complex and have highly variable amplitudes, appearance, and durations. In contrast, acoustic arrivals at this 0.5-5 km distance are fairly simple with a few primary wave shapes and variations. Some aspects of mining blasting practice can be inferred from the near-source seismo-acoustic waveforms. These may then be compared with seismic or acoustic arrivals at regional distances.
DE: 0350 Pressure, density, and temperature
DE: 7200 SEISMOLOGY
SC: U
MN: 2003 Fall Meeting