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Field work on rock pressures developed when railway tunnels are driven in fissured rock

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Summary

  1. 1.

    When single tunnels are driven through fissured rock at depths reaching several hundred meters, rock pressure is manifested mainly as rockfalls, the extent and position of which depend mainly on the degree of fissuring of the rock.

  2. 2.

    The rockfalls occur mainly in the roof sector of the working. With increasing degree of fissuring and height of the workings, rockfalls occur in the walls.

  3. 3.

    By classifying the fissuring of rocks on the basis of the number of fissures per meter of exposed rock, we can establish a specific relation between the degree of fissuring and the extent of the rockfall or the load on the supports. The figure and Table 4 give recommendations for determining the extent of rockfalls and the loads on the supports in workings with span 6–9 m.

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Literature Cited

  1. I. N. Shubin, Determination of the Degree of Fissuring of Rocks in Tunnel Workings, Transportnoe Stroitel'stvo, No. 12 (1960).

  2. Railway and Road Tunnels, Planning Standards [in Russian], SNiP II-D.8-62, Moscow (1963).

  3. Ya. Gel'man and B. P. Bodrov, Stress in Prefabricated Tunnel Linings of the Subway, Symposium Articles of TsNIIS [in Russian], No. 31, Moscow (1959).

  4. F. F. Gaman et al., The ÉD-2 and ÉDS-1 Electric Dynamometers, Voprosy Gornogo Davleniya, No. 11, Novosibirsk, Izd. SO AN SSSR (1962).

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  5. V. A. Mizyumskii, An Experimental Method of Determining Rock Pressure in Tunnels, In: Problems of Geotechnique [in Russian], Moscow, Transzheldorizdat (1956).

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Authors
  1. B. E. Slavin
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  2. V. P. Kazakov
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Additional information

SibTsNIIS, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 99–102, March–April, 1967.

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Slavin, B.E., Kazakov, V.P. Field work on rock pressures developed when railway tunnels are driven in fissured rock. Soviet Mining Science 3, 180–183 (1967). https://doi.org/10.1007/BF02497284

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  • DOI: https://doi.org/10.1007/BF02497284

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