The foundation stability and residual deformation must be evaluated before building life or service facilities above old mine goaf.
在老采空区上方建设生活或服务设施时，必须对老采空区上方地基稳定性和残余变形情况进行评价和预测。
Deformation of ground surface above old mine goaf is a complex nonlinear process, which has complex, sudden, and long-term features.
老采空区上方地表变形是一个具有复杂性、突然性和长期性等显著特点的非线性过程。
Trough case study, detail signals of dynamic deformation of buildings above old mine goaf are obtained using multiscale empirical mode decomposition method.
通过实例研究，证实采用多尺度经验模态分解可获得老采空区上方地表建筑物的动态变形细部信号。
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