关键词: 地下矿山, 竖井, 稳定性分析, 数值模拟

Abstract: In the process of metal mines mining to the deep gradualy，the range of surface movement continues to expand，and the shaft set up outside the moving range will extend the construction period of oth⁃ er development projects and increase the amount of work. The movement and deformation of ore rock is the main factor affecting the safety and stability of shaft. The measure wells are arranged in the range of surface movement，and the wellbore may be deformed and damaged by underground mining. In order to ensure the safety of the wellbore in the underground mining process of metal mines，the ore body mining scheme is de⁃ signed to extend the available period of the measure well，and the three-dimensional numerical simulation software is used to simulate the mining situation. Through the analysis of wellbore deformation，shaft sur⁃ rounding rock stress and plastic zone and other indicators，the maximum safe available time node of the mea⁃ sure well is studied. The analysis results show that according to the mining and filling scheme，in the fourth stage of the mining stage，the inclination value，curvature and vertical deformation value of the shaft wall meet the requirements. The maximum principal stress of the shaft did not change significantly after the exca⁃ vation and filling of the stope，and the maximum change value is 3.42 MPa. At the same time，the stress， displacement and plastic zone of the first five mining stages are analyzed. The results show that the shaft is in a relatively stable state in the first phase of the mining and filling plan，which can ensure the needs of mine production.

Key words: underground mine, shaft, stability analysis, numerical simulation