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Surface deformation of goaf is a complex non-linear process, which has a hidden, complexity, and long-term features. Before building the life or service facilities in the goaf, we must have evaluated the stability and residual. In this paper, a new idea was put forward for stability analysis and evaluation of goaf by multi-scale decomposition using EMD(Empirical Mode Decomposition) method. Case study...
In this paper, the structure of multi-scale decomposition and reconstruction of empirical mode decomposition (EMD) theory is defined. Through the combination of wavelet and EMD theory, a new EMD-wavelet dynamic deformation data de-noising model is proposed. The model is presented to reduce noise of coordinate time series. Firstly, the non-linear series are decomposed into stationary IMFs and residual...
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