Publications

To detect and to locate the frequently occurring rockbursts within the mining area at Grangesberg, Sweden, the mining company has installed a local network of geophones. Mathematical technique is presented for hypocentre determination assuming a constant velocity model and a three-dimensional network of geophones with high-speed recording. Two sets of input data are feasible: 1) relative P arrival times; 2) S minus P arrival times. The former set requires readings from at least five geophones; for the latter readings from four geophones are sufficient. Factors influencing the resulting location accuracy are studied in various examples. General conclusions and recommendations are given.-Author

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Wahlström, R. (1980): Determination of rockburst hypocentres. Geofizycznych badan w kopalniach, Mogilany, 17 - 19 X 1977 = Some geophysical problems in mines, Panstw. Wyd. Naukowe, 37-54.