岩体破坏弹性波CT动态探测试验研究

The dynamic detection of rock mass failure by elastic wave computerized tomography

介绍了弹性波CT探测的原理与测试方法 ,采用声速 (纵波速度 )作为反演参量 ,声速的变化反映岩体的受力状态、结构变化以及破坏程度 ,结合煤层开采中煤层底板岩体破坏的过程进行声波CT动态探测试验。研究表明 ,弹性波CT可以用于动态探测岩体破坏 ,探测结果直观 ,达到高精度和高分辨率的精细探测要求 ,结果可靠。

The principle of dynamic detection and methods of elastic wave computerized tomography(CT) are introduced. The P-wave velocity, whose changes reflect the stress states, the changes in structure and the failure degree of rock mass, is used as an inversion parameter. The revisional simultaneous iterative reconstruction technique(SIRT) is applied to inversion. The dynamic detection trial of rock mass failure at different mine stages in coal mine is made by acoustic wave CT. The results indicate that the elastic wave tomography can detect the rock mass failure dynamically in high accuracy and high resolution.