...In order to understand the nature of these geological phenomena and ensure the safety of caverns in the rock mass during use, the strain and displacement of the rock mass are observed. For example, when a large load acts on the rock mass and tiny cracks are generated, the amplitude and frequency of elastic vibrations (crack sounds) are observed to predict the sudden rockburst phenomenon in which the rock mass around the tunnel breaks. Also, the displacement of the slopes of open-cut mines or the walls of tunnels and tunnels, as well as the load acting on supports, are regularly observed to determine the stability of rock slopes and caverns in the rock mass and to confirm that the design and construction were appropriate. This is another important role of rock mechanics. [Yuichi Nishimatsu]... *Some of the terminology that refers to "crack sounds" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このような地圧現象の本質を知り,使用中の岩盤内空洞の安全を確保するために,岩盤内のひずみや変位などが観測される。たとえば,岩盤に大きな荷重が作用して,微小な亀裂が発生するときに出る弾性振動(亀裂音)の振幅や発生回数を観測して,坑道周辺の岩盤が突然破壊する山はね現象を予知したり,露天掘鉱山の斜面あるいはトンネルや坑道の壁面の変位,さらには支保に作用する荷重を定期的に観測して,岩盤斜面や岩盤内空洞の安定性を判定し,設計や施工が適切であったことを確認することも,岩石力学の重要な役割の一つである。【西松 裕一】。… ※「亀裂音」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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