Abstract: The fundamental concepts of pillar model and pillar structure body were defined in this paper. Based on the survey data of structural planes of the roadways related to the selected area of pillar model, the block calculation function of GeneralBlock was used to preliminarily deconstruct the pillar structure bodies. According to the authenticity analysis results of pillar structure bodies, the spatial endowment situation of pillar structure bodies was accurately deconstructed by using geometric method. Based on the failure modes of structural body, the mechanical model was built and the area of the minimum fixed surface of the fixed structural body was calculated. The mobility mechanisms of the real pillar structure bodies were analyzed by using mechanics and collection methods, and the calculation formula of stability coefficient of the structure body was derived.

Key words: pillar, structural body, deconstruction, block theory, stability