Acoustic Emission testing

Acoustic emission monitoring for earthquake precursors and s

Update time：2009-08-18 18:18　　　 Viewed：次

Landslide problem is not only a threat to the production safety, and some even havoc on local vulnerable ecological environment, and thus the slope stability monitoring is of great significance. The slope stability of acoustic emission monitoring on the spot has got a certain application, but the basis of related research is very weak.

Experimental study on the shear failure process of rock acoustic emission activity characteristics and similar material in the process of uniaxial compression AE activity characteristics, using the similar material model to simulate the process of landslide and the acoustic emission monitoring. Experimental results for field monitoring sensor in the layout, the determination of critical parameters, etc.

Landslide hazard and its monitoring

In China's northwest, southwest and some mountain regions, there are many natural soil and rock slope hilly region. Due to reasons such as vegetation destruction, it often causes disasters such as traffic jams, which even lead to great destruction on the local ecological environment. There are also a lot of slope in transportation, water conservancy, water and electricity and open-pit mine, which is a serious hazard to production safety .

Studies suggest that landslide is a process that landslide come into being and develop until the final, and also a longterm, on and off, strong or weak and unstable process. From this view, the landslide can be forecast. There are many prediction methods of landslide, such as deformation, stress, temperature and seepage observation, telemetry, and acoustic emission monitoring and so on. In these methods, acoustic emission monitoring method has the advantages of dynamic realtime monitor to locate the break point, and the convenience of information transmission, thus attracting widespread attention .

Although acoustic emission technology has been used in slope stability, but there is still much work in basic studies such as simulation study of landslide sliding process and sound source localization research of rock. According to this simulation, our experiment focus on the shear failure process of rock acoustic emission characteristics and similar material in the process of uniaxial compression AE activity characteristics, the landslide process of similar material simulation and the acoustic emission monitoring, to attract the attention of researchers to study this work.

AE activity of rock shear test

The influencing factors of landslide can be classified as internal factors and external factors. Internal factors mainly refers to landslide ‘s lithology, rock strength, degree of slope rock mass integrity and broken and the surface of the master (weak surface) on the mechanical properties (shear strength) and so on. The destruction of landslide is mainly shear failure. Therefore, it has important theoretical significance and application value to the discrimination of landslide’s destruction process and damage location.
(Editor：admin)

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