鱼田堡煤矿地应力的超声波检测

THE ACOUSTIC MEASUREMENT OF STRESS IN-SITU IN YU TIAN BO MINE

利用声波在弹性介质中的传播特性,阐述了在鱼田堡煤矿进行的地应力超声波检测,并通过多元非线性模拟方法和二次正交变换,得到了被测点的声波椭球,然后在实验室进行了不等压三轴条件下应力与声波关系的实验研究,得出了被测点的应力椭球,从而确定出了测点部位处三个主应力方向和量级,为地应力场的数值分析提供了一定的依据。

In this paper, the acoustic.measurement of stress in-situ in Yu Tian Bo mine is expounded based on the characteristics of the acoustic wave propagation in elastic medium and the measurement method. Using multivariate non-linear regression analysis and quadratic orthogonal transformation, the elliposid of acoustic wave is obtained from the datum of practical measurement. The elliposid of stress is gotten on the basis of the experimental study of the acoustic velocity-stress relation under three-dimentional different stress states. Therefor, the direction and quantitative grade of the three principal stresses of the measure locations is affirmed and certain condition is supplied for the numerical analysis of the stress field.