Research on surrounding rock feature identification method of coal mine roadway based on tunneling parameters

In the coal mine tunnel TBM excavation, in order to identify the broken surrounding rock state in time during the excavation process, a method based on tunnel excavation parameters for identifying the surrounding rock characteristics of coal mine tunnels is proposed. Firstly, according to the abnormal changes in the travel parameters of the support boot hydraulic cylinder during the excavation, it is judged that the TBM excavation has entered the broken surrounding rock section from the stable surrounding rock section, thus obtaining the data set of the stable surrounding rock section and the transitional section. Then, based on the data set, the correlation and recognition ability of the tunneling parameters are analyzed, the excavation parameters for identifying the broken rock characteristics are selected, and finally, a long short-term memory (LSTM) model is used for prediction. According to the prediction results of the excavation parameters, the identification index is obtained, and subsequent identific