The overburden responses in gently inclined orebody mining are different from those in horizontal orebody affected by the orebody dip angle. In particular, the mining-induced stress presents asymmetrical distribution characteristics spatially, resulting in stress concentration and large-scale pressure relief phenomenon in the surrounding rock. As a result, frequent ground pressure disasters such as roof collapse and barrier splitting occur frequently. Moreover, the ground pressure evolution law and the interaction between stopes in multistope mining are complex. The effective ground pressure control measures cannot be taken due to unclear understanding of the evolution of stress and displacement fields, justifying the investigation of the distribution and evolution of underground pressure for safe and efficient mining. In this work, a physical experiment and numerical simulations were performed to analyze the evolution law of stress and roof subsidence during multistope mining, revealing the failure characteristics of the overlying strata. Also, the mechanical interaction between stopes in the process of three-stope mining were elucidated.
Full-text paper:
Mining, Metallurgy & Exploration (2023) 40:637–653, https://doi.org/10.1007/s42461-023-00746-w
