對黃沙坪鉛鋅礦的鉆孔巖芯在剛性壓力機上進行了室內AE 試驗,試驗所用的AE 傳感器
頻率范圍為100～1000 Hz。試驗證實灰巖試樣具有明顯的Kaiser 效應,且在循環加卸載條件下,能有效地消除試樣存放時間對Kaiser 效應的影響,所測垂直方向的原巖應力大小與測點處的自重應力非常吻合。
關鍵詞:地應力;聲發射; Kaiser 效應
Abstract :Acoustic emission test s were carried out in the lab with the drill core obtained f rom Huang2 shaping Lead2Zinc Mine on the rigid compression testing machine. The f requency range of the AE sen2 sor used in the test s was f rom 100 to 1000 Hz. Test result s showed that the limestone specimen pro2 duces obvious Kaiser effect . Furthermore , under the conditions of cycling loading , the influence of the storage time of the specimen on the Kaiser effect could be effectively eliminated and the measured ver2 tical in - situ rock st ress was in excellent coincidence with the self - gravity st ress at the survey point .
Key Words :Ground st ress , Acoustic emission , Kaiser effect