岩石の一軸圧縮破壊の過程における微震音の発生特性

概要

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Rocks in instability under stress are prone to produce micro-seismic noise, and it is considered that that has something to do with destruction of rocks. In order to find a suitable method for foreseeing roof falls in tunnel construction words or slope failures in excavation works by detection of the micro-seismic noise, the necessary studies of fundamental facts are being made in the laboratory. The present paper describes the results obtained from the experiments of the micro-seismic noise during destruction of rock samples under he laboratory condition. The main results are summarized as follows. The relationship between the occurrence of micro-seismic noise and the load depends on the properties of the rock. The frequency distribution of number of the micro-seismic noise with respect to the energy possesses a statistical regularity, and it is expressed by the following equation : n(e) =k・e^<-m> where e is the energy of the micro-seismic noise, n(e) is the number of the micro-seismic noise having e nergy e, and k and m are constants. In the above equation, the value of m has relation to the modulus of elasticity of the rock and depends on the deformation condition during the process of destruction. It if suggested that the value of m is an important index for predicting rock failures.
社団法人日本材料学会の論文
1968-10-15