HR: 0830h
AN: U31B-0010    [PDF]
TI: Analysis of In Mine Acoustic Recordings for Single Fired Explosions
AU: * McKenna, S
EM: smckenna@mail.smu.edu
AF: Department of Geological Sciences Southern Methodist University, 3225 Daniel Avenue, Dallas, TX 75275 United States
AU: Hayward, C
EM: hayward@mail.smu.edu
AF: Department of Geological Sciences Southern Methodist University, 3225 Daniel Avenue, Dallas, TX 75275 United States
AU: Stump, B
EM: bstump@mail.smu.edu
AF: Department of Geological Sciences Southern Methodist University, 3225 Daniel Avenue, Dallas, TX 75275 United States
AB: In August of 2003, a series of single fired test shots were executed at a copper mine in Arizona. The ten shots, fired on August 18 and 19, 2003, ranged in size from 1700 lbs to 13600 lbs in simultaneously detonated patterns ranging from a single hole to eight holes. All were located within the same pit and within 100 m of each other. Both free face and bench shots were included. Southern Methodist University had previously deployed a set of acoustic gauges ringing the active production areas of the mine. The five Validyne DP250 sensors recorded not only the ten test shots, but also seven delay fired production shots over the four day period from August 18 to 21, 2003. Each recorded blast arrival was analyzed for peak amplitude and spectrum. Signals were then compared for the variability between shots and sensors as well as a comparison between fully contained and poorly contained shots. Blast yield, scale depth, and centroid depth were compared to the above measured quantities for each of the single-fired and production shots.
DE: 0399 General or miscellaneous
DE: 7299 General or miscellaneous
SC: U
MN: 2003 Fall Meeting