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基于细观损伤力学,运用RFPA岩石破裂过程分析软件,建立纵向采空区群动态失稳的等效数值模型,研究单列和多列纵向采空区群的动态失稳演化过程。结果表明:相比于单列纵向采空区群,多列纵向采空区群的顶板更易发生破坏,岩体结构的抗破坏能力较弱;单列和多列纵向采空区群动态失稳具有不同的演化过程,即单列纵向采空区群按照空区群左右两侧帮壁、顶(底)板到整体的顺序失稳破坏,多列纵向采空区群按照间柱、空区群顶(底)板到左右两侧帮壁的顺序失稳破坏。
Based on meso-damage mechanics, an equivalent numerical model of dynamic gouge loss in longitudinal gob-gorges is established by using RFPA software for rock fracture analysis. The dynamic instability evolution of single and multiple longitudinal gob-gorges is studied. The results show that compared with single vertical gob group, the roof of multi-longitudinal gob group is more prone to damage and the rock structure is less damaging; the dynamic instability of single-row and multi-column gob groups is different , That is, the vertical row of gob-gorges in a single row is destabilized and destroyed in the order of the upper wall and the top (bottom) Bottom) to the left and right sides of the wall to help the order of the wall instability damage.