Microseismicity in a flooded potash mine,the Hope mine,Federal Republic of Germany |
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| Authors: | C Heick D Flach |
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| Institution: | (1) Kavernen Bau-und Betriebsgesellschaft mbH, Roscherstraße 7, 3000 Hannover 1, Germany;(2) Institut für Tieflagerung, Gesellschaft für Strahlen-und Umweltforschung mbH München, Theodor-Heuss-Straße 4, 3300 Braunschweig, Germany |
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| Abstract: | Measuring of microseismic events has been carried out at the former potash mine of Hope since early 1984.Analysis of the data demonstrates an immediate temporal relationship between brine introduction and onset of microseismic activity. The spatial distribution of the sources indicates a dependence on brine level height. Sources are found preferentially immediately next to roads and workings. Source radii, estimated from the frequency ranges in the seismograms, varied with the cross-section of neighbouring cavities and had a similar, order of size.Events occurred rarely in the previously flooded mine sections Similarly, the zone below a depth of approx. 600 m below sea level was virtually inactive. |
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| Keywords: | Microseismicity flooded potash mine space and time seismicity variations Hope mine |
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