关键词: 构造应力, 充填采矿, 地表变形, FLAC3D

Abstract: In this paper, to reveal the surface deformation law and internal mechanism induced by filling mining under the complex environment of high tectonic stress, taking Jinchuan No.2 Mine as the engineering background, we put emphasis on the space-time evolution process of the surface deformation and subsidence in No.2 Mine, by using numerical calculation, site monitoring and theoretical analysis. The results show that the vertical deformation of the ground surface in filling mining under high tectonic stress experiences the stages of embryonic, differentiation and development. The ground surface gradually evolves into a subsidence deformation zone and a rise deformation zone from the whole subsidence deformation in the beginning. In addition, the subsequent orebody recovery will further promote the development of surface displacement rising zone, but the subsidence deformation gradually becomes stable, which has essential difference to that of the mines in gravity stress environment. More-over, the joint action of horizontal tectonic stress, mechanical property of surrounding rock and filling bodies are the inner motivation to the ground surface rising.

Key words: tectonic stress, filling minng, ground surface deformation, FLAC3D