caa a22 4500 477048099 CHVBK 20180405111335.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00877484 doi (NATIONALLICENCE)springer-10.1007/BF00877484 Rock-mass characterization using intrinsic and scattering attenuation estimates at frequencies from 400 to 1600 Hz [Elektronische Daten] [Andrew Feustel, Cezar-Ioan Trifu, Theodore Urbancic] Intrinsic and scatteringS-wave quality factors (Q β) were estimated using the Multiple Lapse Time Window Analysis (MLTWA) for microseismic events (M<−1) with source-sensor distances of 45 to 120 m, associated with an excavation at 630 m depth in Strathcona Mine, Sudbury, Canada. Additional information on the rock mass was provided by underground structural mapping data. IntrinsicQ β values, at 800 Hz, were on the order of 140, similar to quality factor values obtained in previous studies using Spectral Decay and Coda-Q methods (120 to 170). The scattering quality factor at this frequency was about 520. An observed frequency dependence of the scattering attenuation suggested that a decrease in the density of scatterers, with scale lengths on the order of 2 m, exists at the site. Characteristic fracture scale lengths were considered to range from 4 to 6 m as identified in the mapping data. These observations were supported by the increase in scattering found for seismic waves with frequencies less than 1000 Hz. By assuming that the identified scatters are characteristic faults, these scatterers can then be considered to increase nonsimilar behavior in source scaling. Overall, our results suggest that MLTWA provides a practical method for remotely characterizing the quality of a rock mass when visual observations are not attainable. Birkhäuser Verlag, 1996 Intrinsic and scattering attenuation nationallicence multiple lapse time window analysis nationallicence characteristic fracture scale lengths nationallicence seismic source scaling nationallicence Feustel Andrew Department of Geological Sciences, Queen's University, K7L 3N6, Kingston, Canada aut Trifu Cezar-Ioan Engineering Seismology Group Canada, K7L 2Z4, Kingston, Canada aut Urbancic Theodore Engineering Seismology Group Canada, K7L 2Z4, Kingston, Canada aut pure and applied geophysics Birkhäuser-Verlag 147/2(1996-07-01), 289-304 0033-4553 147:2<289 1996 147 24 https://doi.org/10.1007/BF00877484 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00877484 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Feustel Andrew Department of Geological Sciences, Queen's University, K7L 3N6, Kingston, Canada aut NATIONALLICENCE 700 1- Trifu Cezar-Ioan Engineering Seismology Group Canada, K7L 2Z4, Kingston, Canada aut NATIONALLICENCE 700 1- Urbancic Theodore Engineering Seismology Group Canada, K7L 2Z4, Kingston, Canada aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 147/2(1996-07-01), 289-304 0033-4553 147:2<289 1996 147 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer