Affiliation:
1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
2. China Academy of Safety Science and Technology, Beijing 100012, China
Abstract
In this study, a three-dimensional finite difference numerical model of the Jinfeng Gold Mine, including surface topography, ore body, shafts, and main faults, was built to estimate the shaft stability and surface deformation induced by underground mining transferred from open-pit mining. Satellite monitoring data of surface displacement at several points was used to calibrate the numerical model. The sequence of excavation and filling in the simulation was determined according to the mining schemes with appropriate simplification. The distribution of large deformations in simulation is consistent with the cracking areas on the slopes and surface. Besides, shaft deformation in the simulation is small, which is consistent with the reality that there are no large deformations of shafts in the underground mining activities above 30 m level. After the completion of simulated underground mining, the deformations of shafts and surface are generally far less than the critical deformation. Hence, we concluded that the shafts and surface of the Jinfeng Gold Mine can remain stable in the underground mining stage. Overall, the method in the study provides references for the estimation of shaft stability and surface deformation in the underground mining stage of mine transfer from open pit.
Funder
Key projects of National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Guizhou Jinfeng Mining Limited
Subject
Geology,Geotechnical Engineering and Engineering Geology
Cited by
5 articles.
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