摘要
考虑岩体变形破坏时不能承受拉应力,FEM-NTA耦合模型法采用有限元分析方法,建立煤层采动后覆岩变形破坏的无拉应力本构模型。采用FEM-NTA法对桃园煤矿1022上提工作面覆岩进行数值模拟,计算结果与理论分析、现场观测的结果一致,说明这种方法更接近岩体变形破坏规律的实际情况,具有较好的应用前景。
FEM-NTA is a finite element method, As rockmass can＇ t bear tensile stress in the process of deformationand failure, the non - tensile stress constitute model was built after coal seam was excavated. The rockmass above 1022workface was simulated by FEM- NTA method. The calculation result is consistent with theory analysis andinvestigation in situ. The numerical simulation by the method is close to actual rockmass deformation and failure rules,Therefore, the method has a good application in the future.
出处
《煤炭工程》
北大核心
2006年第3期64-67,共4页
Coal Engineering
