The invention discloses a mining area three-dimensional
deformation monitoring method and
system based on an SAR image, and relates to the technical field of mining area monitoring, and the method comprises the steps: extracting a line-of-
sight deformation sequence from a
time sequence deformation phase set, identifying a deformation acceleration point and a convergence inflection point in the line-of-
sight deformation sequence, and segmenting a mining period based on the deformation acceleration point and the convergence inflection point, obtaining a plurality of sub-periods; differential interference is carried out on the initial SAR image and the
tail SAR image of each sub-period, differential interference deformation diagrams of the sub-periods are obtained, and
earth surface three-dimensional deformation estimated values corresponding to the sub-periods are deduced based on mining geological parameters of the target mining area;
coupling the differential interference deformation graph and the three-dimensional deformation estimated value to obtain a three-dimensional deformation initial field; according to the method, the deformation evolution rules of the stages such as acceleration, stabilization and convergence are accurately described, the accuracy and
time sequence continuity of three-dimensional
deformation monitoring of the mining area are greatly improved, and the dynamic change characteristics of
surface deformation in the whole mining process are completely presented.