Stability Analysis of Surrounding Rock in Deep Soft Rock Roadway Based on Improved Fuzzy Analytic Hierarchy Process
To address the stability issues of surrounding rock in deep soft rock roadways, this paper proposes an improved fuzzy analytic hierarchy process (FAHP) that integrates the entropy weight method to determine the weight of each influencing factor. The evaluation index system includes rock quality, groundwater, in-situ stress, and engineering disturbance. The model is applied to a typical deep soft rock roadway in a coal mine. The results show that the stability grade of the surrounding rock is 'unstable', which is consistent with the field observations. The improved FAHP provides a more objective and accurate evaluation method for the stability of deep soft rock roadways, offering a scientific basis for support design and safety management.