Evaluation Of The Impact On Slope Stability Of Underground Engineering Exploit

The slope stability problems of underground engineering excavation is such a hot issues of mining safety production. This article use simulation, research the overlying rock mass deformation system and influence law of underground engineering excavation. Based on the Zijinshan gold-copper mine, respectively discusses the moving mehanism and deformation law of slope when goaf under the condition of different processing methods and mining sequence. The main achievements are as follows.(1) Based on Zijinshan gold-copper mine open-pit and underground mining engineering, considering mining caving and filling mining methods, using FLAC3D to establish simulation model, and study the damage form and the deformation characteristics of the slope rock mass under open-underground mining, find that when using filling method to treat goaf, part area of the slope will produce landslide and need to take appropriate control measures to deal with.(2) According to the research on slope rock mass deformation under when combine open pit and underground mining at the same time. Find the rock slope zoning theory in Zijinshan gold-copper mine, and methods for determination different zone. Divided the slope rock into sliding zone; subsidence zone; fissure zone; caving zone, and find the way to compute the height of different zone.(3) Based on different mining sequence, analysis the result of numerical simulation of Zijinshan gold-copper mine. Study the influence mechanism of overlying rock mass deformation and its effect on the stability of the slope. According to the forms of rock mass slope displacement and subsidence, Suggest the better safety control measures and technology solutions to ensure the slope stability.(4) According to the influence factors of Zijinshan gold-copper mine geological structure. Application slip field theory, find out the slope stability coefficient and dangerous slip plane. To analysis the stability of slope when combined open-underground mining. Finally integrated the results of numerical simulation, and find the cutting slope and reducing load measures.