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为了研究石膏矿采空区顶板和底板及开采前后地表位移和主应力变化,评估采空区稳定性。利用MIDAS/GTS建立三维数值模型,动态模拟邵东石膏矿采空区的开采过程,计算得出采空区顶板和底板最大位移分别为17.0mm和11.8mm,主应力最大11.75 MPa,均在安全允许值范围内。最后井下测绘复核和钻探结果验证数值模拟结果的合理性,为采空区安全评估建立理论模型和数据支撑。
In order to study the gypsum mine gob roof roof and floor and mining before and after the ground surface displacement and stress changes to assess the stability of goaf. The three-dimensional numerical model was established by MIDAS / GTS to simulate the mining process in the gob of Shaodong gypsum mine. The maximum displacements of roof and floor in gob of goaf were 17.0mm and 11.8mm respectively and the maximum principal stress was 11.75 MPa, Value range. Lastly, the rationality of the numerical simulation results verified by the downhole mapping and drilling results is validated to establish the theoretical model and data support for the safety assessment of the goaf.