Acquiring Rotational Ground Motion From Triggered Seismic Events
Abstract eng: This paper presents preliminary results of a program of collecting ground rotations from the surface stations of deep mining area of “Ziemowit” mine located in the Upper Silesian Coal Basin in Poland. A set of 51 rotations records acquired during the first 7 weeks of the recording program was analyzed. Three strongest records are discussed in detail in this paper. The program, in its longer perspective, aims at getting rotations of as intensive mine tremors as possible. So far the maximum measured rotational velocity reached 0.03o/s, while respective maximum rotational acceleration was equal to 2.53 o/s2 which was measured during mine tremor with local Modified Mercalli intensity of about IV. These rotations represent rockbursts of rather low magnitude, well below mL=3, but stronger mine tremors are expected to be collected in near future. The time history records of ground rotations have similar durations like the translational records but their Fourier spectra are shifted in a characteristic way, predicted by theoretical analyses [5], [17].
Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2017-01-18, last modified 2017-01-18
guest ::
