(中南工業(yè)大學(xué)資源環(huán)境與建筑工程學(xué)院，長沙 410083;
重慶大學(xué)資源與環(huán)境學(xué)院， 重慶 630044)
摘 要: 對描述巖爆傾向的彈性變形能量指 數(shù)W ET進(jìn)行了研究。巖石超聲檢測試驗(yàn)表明， 在單軸壓縮條件下， 巖石試樣中彈性波傳播速度發(fā)生明顯變化的特征區(qū)間，正好與其強(qiáng)度的80%左右的應(yīng)力水平具有良好的對應(yīng)關(guān)系，并據(jù)此提出了利用彈性波速度變化來控制卸載時機(jī)， 達(dá)到更準(zhǔn)確測定W ET的新試驗(yàn)方法。 這一方法，較好地克服了由于巖石力學(xué)性質(zhì)離散度大對W ET測定準(zhǔn)確性的限制。
關(guān)鍵字: 巖爆 應(yīng)力 彈性應(yīng)變能指數(shù) 彈性波
（College of Resource, Environment and Civil Engineering,
Central South University of Technoloyg, Changsha 410083, P. R. China
1 Chongqing University, Chongqing 630044, P. R. China）
Abstract:The elastic strain energy index (W ET ) for describing rockburst tendency was studied. The ultrasonic measurements for rock samples under uniaxial compression showed that there is a good correspondence between the feature zone that the velocity of elastic wave is evidently changed and the stress level that about 80% of the rock's compression strength. Based on the conclusion, a new experimental method for determining WET was proposed, which can conquer the limit to accuracy of W ET resulting from the dispersion ratio of rock mechanical properties.
Key words: rockburst stress elastic strain energy index elastic wave
