摘要
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。
A site stability evaluation on the mined out area was performed in order to study the ground subsidence as well as the principal stress change in both the roof and the bottom of a gypsum mine before and after the mined out area. The gypsum min- ing process was able to be simulated by establishing a three-dimensional finite element model using MIDAS/GTS. The results indicate that the maximum vertical displacement at the roof and the bottom of the mined-out area are 17.0 mm and 11.8 mm, respectively. The maximum principal stress is 11.75 MPa. All values are within the allowable range. The mining monitoring results and the bore holes demonstrated the consistency among between the simulated values and the measured.
作者
龙浩波
张可能
胡小林
LONG Haobo ZHANG Keneng HU Xiaolin(Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environmental Monitoring, Ministry of Education, School of Geoscienees and Info-Physies, Central South University, Changsha, 410083 Hunan Institute of Geophysical and Geochemical Exploration, Shaoyang 422002)
出处
《土工基础》
2017年第2期172-174,179,共4页
Soil Engineering and Foundation
