Investigation into the interactive feedback and rock burst mechanism under mining disturbance

采矿扰动下岩爆的交互反馈机制研究

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Abstract

Rock burst accidents induced by mutual mining–excavation disturbances occur frequently in deep coal mines, especially when multiple working faces operate in close proximity. This study systematically investigates the interactive feedback mechanism between static and dynamic loads and the resulting rock burst initiation. Key findings include: Roadways are more susceptible to rock burst under mining disturbance compared to working faces. The relative distance between working faces critically influences the intensity and scope of dynamic instability. A safety distance for opposing mining faces is derived based on elastic–plastic superposition principles. Using the Bessel function expansion method, the mechanical response of anchored roadways under composite seismic sources is analyzed. The results indicated that stress intensity under combined P- and S-waves is significantly enhanced compared to single-source scenarios. A rock burst initiation criterion based on the minimum energy principle is proposed, leading to a targeted strategy for source-specific load reduction. This study provides a theoretical foundation for controlling rock burst induced by mining interactions.

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