Figure 7

Coal seam roof surface fitted by matlab: (a) Coal seam roof surface; (b) Contour top view; (c) Three-dimensional coordinate point residual, it can reflect the degree of fit of the model.
Coal seam roof surface fitted by matlab: (a) Coal seam roof surface; (b) Contour top view; (c) Three-dimensional coordinate point residual, it can reflect the degree of fit of the model.