Study on decomposition of acoustic emission signal and identification of rock mass fracture

摘要

To study the effect of rock body's brittleness on rupture, acoustic emission test of rupture of rock body under the action of load has been studied. The character of rock's rupture has been studied which is bonded with the result of the AE test and based moment tensors method. The study selected a block and the joint determination test of indoor uniaxial compression and acoustic emission is developed through selecting a shale rock of Qingshankou formation of a certain geological structure. The test has tested the change rule between stress strain and acoustic emission parameters of rock body and the rupture model of shale is analyzed through the moment tensors model which is developed by this study. The result shows that: When the brittleness of rock body is relatively low, single rupture face is common and the AE is concentrated around the rupture face. As the brittleness of rock body is enhanced, a lot of rupture faces appeared and some tension fracture and shear fracture and other multiple mixed fracture models existed.