This paper deals with the shape and influenced factors of surface non-continuous defor- mation due to mining. With finite element method, analysis are made to derive the relations be- tween discontinuous deformation and mining affection, weak plane's position & thickness, and mechanical property of weak-plane medium. The mutual affection of multiple weak-planes is also discussed. The results of the paper lay a foundation for constructing the calculation method of sur- face discontinuous deformation.
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