Abstract: CMS (3D Cavity Monitoring System) is used to make a precise survey of the cavity formed by mining in a metal mine and a 3D model for the cavity that has coordinates fully identical to those of the real mine is established based on the survey data by using SURPAC which is a large deposit modeling software. The cavity survey model established is compounded with the unit model of mining design and the stope over-excavation and under-excavation of the stope are calculated by doing Boolean operations between the models. The cavity model obtained by the real survey is dissected and the obtained sections are then compared to those of the stope construction design for analyzing the safety conditions of the above-roof opening engineering, providing first-hand data for the further improvement of the extraction design and for the safety control of the mine.

Key words: CMS, SURPAC, Over-excavation, Under-excavation, Safety analysis