石炭強度の載荷速度依存性に関する研究

書誌事項

タイトル別名
  • Loading-Rate Dependency of Coal Strength.
  • セキタン キョウド ノ サイカ ソクド イゾンセイ ニ カンスル ケンキュウ

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抄録

Uniaxial compression, uniaxial tension and indirect tension (Brazilian) tests were carried out for coal (anthracite) obtained in a coal mine located about 26 km west of Beijing.<BR>Complete stress-strain curves not only in uniaxial compression test but also in uniaxial tension test were successfully obtained. In post-failure region of uniaxial tension test, the curve showed Class I characteristics accompanied with small amount of residual strength. The peak strength obtained by the uniaxial tension test was far less than the indirect tensile test frequently conducted.<BR>The strain rate was alternatively increased and decreased to obtain the loading-rate dependency. When strain rate was increased, stress increased abruptly by a certain amount depending on the loading-rate dependency of the rock. The experimental results showed that loading-rate dependency of the coal both under the uniaxial compression and tension stress was relatively smaller than the most rocks that had been tested by the authors.

収録刊行物

  • 資源と素材

    資源と素材 118 (1), 23-28, 2002

    一般社団法人 資源・素材学会

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