Rock mass integrity evaluation method of roadway surrounding rock mass based on borehole image acoustic radar data.

The integrity of the roadway surrounding rock is directly related to the safety and stability of the mine, and it is of great significance to carry out a rapid evaluation method for the surrounding rock integrity of the coal mine roadway during the construction process. In response to the limitation of traditional borehole rock integrity evaluation methods on borehole wall images, this paper proposes a coal mine roadway rock integrity evaluation method based on borehole image-acoustic-radar data, utilizing the unique advantages of borehole image, acoustic scanning, and radar detection technologies in-situ. Firstly, by constructing a multivariate characteristic parameter analysis method for borehole rock mass structure, the multivariate characteristic parameter description of borehole rock mass structure can be achieved. Subsequently, by constructing and integrating integrity factors of different scales, an evaluation method for multi-scale surrounding rock integrity of coal mine roadway is formed. Finally, combined with practical case analysis, the correctness and superiority of the method proposed in this paper are verified. The results show that the method proposed in this paper can reveal the structure and defect characteristics of rock masses from different perspectives and levels, providing rich data support for the evaluation of surrounding rock integrity. This method integrates multiple borehole testing techniques and simultaneously considers the global and local integrity analysis of rock mass structures of different scales around the borehole.