| Stability and reliability of pit slopes in surface mining combined with underground mining in Tonglushan mine |
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| 作者姓名： | 罗一忠 吴爱祥 刘湘平 王洪江 |
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| 作者单位： | SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,China |
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| 摘 要： | Slope stability is of critical importance in the process of surface-underground mining combination. The influence of underground mining on pit slope stability was mainly discussed, and the self-stabilization of underground stopes was also studied. The random finite element method was used to analyze the probability of the rock mass stability degree of both pit slopes and underground stopes. Meanwhile, 3D elasto-plastic finite element method was used to research into the stress, strain and rock mass failure resulting from mining. The results of numerical simulation indicate that the mining of the underground test stope has certain influence on the stability of the pit slope, but the influence is not great. The safety factor of pit slope is decreased by 0.06, and the failure probability of the pit slope is increased by 1.84%. In addition, the strata yielding zone exists around the underground test stope. The results basically conform to the information coming from the field monitoring.
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| 关 键 词： | 表面地下采矿 稳定性 可靠性 数值模拟 随机有限元 |
| 收稿时间： | 25 December 2003 |
| 修稿时间： | 5 March 2004 |
Stability and reliability of pit slopes in surface mining combined with underground mining in Tonglushan mine |
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| Luo Yi-zhong , Wu Ai-xiang , Liu Xiang-ping and Wang Hong-jiang.Stability and reliability of pit slopes in surface mining combined with underground mining in Tonglushan mine[J].Journal of Central South University of Technology,2004,11(4):434-439. |
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| Authors: | Luo Yi-zhong Wu Ai-xiang Liu Xiang-ping and Wang Hong-jiang |
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| Affiliation: | (1) School of Resources and Safety Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | Slope stability is of critical importance in the process of surface-underground mining combination. The influence of underground mining on pit slope stability was mainly discussed, and the self-stabilization of underground stopes was also studied. The random finite element method was used to analyze the probability of the rock mass stability degree of both pit slopes and underground stopes. Meanwhile, 3D elasto-plastic finite element method was used to research into the stress, strain and rock mass failure resulting from mining. The results of numerical simulation indicate that the mining of the underground test stope has certain influence on the stability of the pit slope, but the influence is not great. The safety factor of pit slope is decreased by 0.06, and the failure probability of the pit slope is increased by 1.84%. In addition, the strata yielding zone exists around the underground test stope. The results basically conform to the information coming from the field monitoring. |
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| Keywords: | surface-underground mining combination stability reliability random finite element method numerical simulation |
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