Study On Acoustic Location Of Rock Discontinuities

Rock is an aggregate of minerals.The properties of the rock are determined by the composition and the porosity of the minerals,and there are many discontinuities in rock.Discontinuities have important influences on the physical and mechanical properties of rock,and rock is a basic material applied widely in engineering.The detection and location of its internal discontinuities plays an important role in understanding the actual properties of the rock.In this paper,rocks with discontinuities are studied,and the characteristics of acoustic waves passing through rocks are analyzed to reflect the relevant information of discontinuities.Firstly,finite element software is used to establish the acoustic wave detection model of rock discontinuity,and the reliability of the model is tested according to the experimental results of previous studies on mechanical properties of discontinuous rock.Then,the thesis considers the influence of different discontinuities of the rock on the arrival time and the amplitude of the first arrival acoustic wave.Finally,compared with the acoustic parameters in the homogeneous rock model,the influence rule for acoustic waves in the discontinuous rock is obtained.According to the rule,the thesis provides a certain references for the actual acoustic detection and location of the rock discontinuities.