Over time, the surface observation values from the monitoring points on both sides of the east and west to the central goaf showed a decreasing trend.
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Application of grey feed forward back propagation-neural network model based on wavelet denoising to predict the residual settlement of goafs.
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The sentences
The settlement velocity curve of the N22 point generally showed a trend of slow decrease, but appeared to have an inflection point, thus it was not in conformity with general laws.