PREDICTION METHOD FOR JOINTED ROCK MASS DEFORMATION BASED ON ACOUSTIC EMISSION SELF-SIMILARITY COEFFICIENT AND ENTROPY

The invention discloses a method for predicting the deformation of jointed rock mass based on the acoustic emission self-similarity coefficient and entropy, which belongs to the technical field of structural stability evaluation and failure prediction of underground rock mass engineering. According to the monitored acoustic emission data, the acoustic emission self-similarity coefficient and entropy are directly calculated, the similarity degree of two processes or two states is judged by the size of the self-similarity coefficient, the minimum value of the self-similarity coefficient of the acoustic emission process indicates the arrival of macroscopic fracture, the calculated entropy value is small, the system disorder degree is low, and vice versa, the increase of entropy value means that the system evolves from a low probability state to a high probability state, that is, from a relatively regular and orderly state to a more irregular and disordered state. The combination of these two indexes can more accurately predict the deformation and instability of jointed rock mass, and provide a quantitative basis for the stability evaluation and failure prediction of underground engineering structures.