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This paper studies an automatic system for the detection and analysis of, on the one hand, microtremors which might be induced by the normal activity of coal mining on the terrain above, and on the other hand, the transmission of the acoustic waves which seem to precede a coal landslide caused by firedamp. Two networks of micro-seismic detection, one on the surface, the other underground, collect data which, once analysed, open up the possibility of establishing connections between mining activity and microtremors. Criteria could then be established to prevent such tremors without, however, claiming that prediction is as yet possible. The characteristics and technical specifications of the system used for both the surface and underground networks are described, together with an explanation of the method adopted and a review of the problems which the system presented in relation to its size and design.

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Authors: VILDES CECHINI E, Escuala de Capataces, Mieres (ES);GUTIERREZ PEINADOR V, Escuala de Capataces, Mieres (ES)
Bibliographic Reference: EUR 14292 ES (1992) 222 pp., MF, ECU 12
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