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Monitoring stresses and temperatures in solid rock by measuring the magnetic field intensity

  • Rock Mechanics and Rock Pressure
  • Published:
Soviet mining science Aims and scope

Summary

  1. 1.

    Changes in the mechanical stresses and temperatures in the solid rock can be detected by measuring anomalies in the magnetic field above the rock by means of M-2, M-14, and other magnetometers.

  2. 2.

    The value of the measured anomaly ΔH depends on the magnetization of the rock, the change in magnetization in the region of stress or temperature change, the volume of the region of changed magnetization, the shape of this region, and the distance of the region from the point of measurement (other conditions being constant)-the greater is I for the rock and V, the volume of the region, and the less is h, the greater will be ΔH.

  3. 3.

    The greater are the mechanical stresses in the rocks, the greater is the change in I, and the more easily measurable is ΔH. In regions of specially great mechanical loads and deformations, the method shows great promise, even for weakly magnetic rocks.

  4. 4.

    The greater the change in I due to temperature changes in specific regions of the solid rock, the greater will be the magnetic anomaly above the heated region.

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Literature Cited

  1. M. A. Grabovskii, “Variations in the magnetic properties of magnetite under the action of mechanical stresses,” Izv. AN SSSR, seriya geogr. i geofiz., No. 27 (1949).

  2. D. L. Finger, “Influence of varying compressive loads on the magnetic properties of magnetite,” Izv. AN SSSR, seriya geofiz., No. 5 (1961).

  3. A. G. Kalashnikov and S. P. Kapitsa, “Magnetic susceptibilities of rocks under elastic stresses,” DAN SSSR,86, No. 5 (1952).

  4. S. V. Vonsovskii, and Ya. S. Shur, Ferromagnetism, Gostekhizdat, Moscow-Leningrad (1948).

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  5. V. N. Kobranova, Physical Properties of Rocks, Gostekhizdat, Moscow (1962).

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  6. A. A. Logachev, Course of Magnetic Surveying, Gosizdatgeollit, Moscow (1951).

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  7. B. M. Yanovskii, Terrestrial Magnetism, Vol. II, Izd. Leningradskogo univ., Leningrad (1963).

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Author information

Authors and Affiliations

  1. Moscow Mining Institute, Moscow, Russia

    V. V. Rzhevskii & V. V. Nosov

Authors
  1. V. V. Rzhevskii
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  2. V. V. Nosov
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Additional information

Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Polezynkh Iskopaemykh, No. 3, pp. 37–4, May–June, 1967.

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Rzhevskii, V.V., Nosov, V.V. Monitoring stresses and temperatures in solid rock by measuring the magnetic field intensity. Soviet Mining Science 3, 243–246 (1967). https://doi.org/10.1007/BF02497884

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  • DOI: https://doi.org/10.1007/BF02497884

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