Damage identification and failure morphological reconstruction for engineering rock mass.

[Display omitted] • In line with the idea of three-dimensional reconstruction technology of CT, a kind of numerical computed tomography method of engineering rock mass is proposed. • Numerical computed tomography method can apparently display the spatial distribution morphology of damage and failure area of rock mass. • Numerical computed tomography method can effectively reveal the intrinsic connection of evolution and quantification of rock mass damage and failure. • Numerical computed tomography method is not limited by the engineering scale effect, and has satisfactory applicability and engineering values. By and large, the traditional CT technology cannot involve the important problems of intrinsic damage identification and reconstruction of large-scale engineering rock mass. In the light of the numerical simulation technology, the digital image processing technology and the three-dimensional reconstruction technology, a kind of numerical computed tomography method is proposed. On the basis of numerical simulation, the external program of the characteristic variable of rock mass damage and failure is called to generate the cloud map model of rock mass damage and failure. In addition, the sequence layered profile images are created by automatically cutting the cloud map model via the self-complied program, as well as adopting the digital image processing technology for batch cropping, batch gray-scale and binarization processing. Eventually, the three-dimensional reconstruction technology is employed to reconstruct the spatial distribution morphology of the internal damage and failure of rock mass. At that point, the proposed method is applied to apparently exhibit the evolution morphology of spatial distribution of the Rm 417 tunnel failure area, and effectively reveal the intrinsic connection of the Rm 417 tunnel failure, such as the location, evolution path and morphology. Consequently, the validity and reliability of the numerical computed tomography method are verified, which has satisfactory applicability and applied values. [ABSTRACT FROM AUTHOR]