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Quantitative analysis of biotechnical reinforcement for a steep slope consisting of composite coal-gangue-soil medium adjacent to a mined-out area

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Journal of University of Science and Technology Beijing 2005年第6期12卷 489-494页

作者： Xingping Lai Mowen Xie Fenhua Ren Meifeng Cai Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China Energy School Xi＇an University of Science and Technology Xi＇an 710054 China West Mining and Hazard Control Key Laboratory of the Ministry of Education of China Xi＇an 710054 China

The engineering and geological characteristics of a steep slope consisting of coal gangue, rock and soil medium in Huating coal mine have been comprehensively investigated. Owing to humid weather, heavy rainfall, vegetation and porous characteristics of the soil and rock mass, the steep slope will be destabilized and induce mud-rock flow or derive hazard easily. Firstly, based on the classical slope reinforcement theory, some regularity between the shear and displacement in the destabilized zone of the slope with or without root strength contribution is presented. Then, based on the experimental and statistical analysis of root strength, hydrological characteristics and stability status, etc., some possible biotechnical techniques for reinforcement of the steep slope have been suggested. These methods are important for quantitative analysis of destabilization of the slope and design of the biotechnical reinforcement.

关键词： mined-out area coal-gangue-soil composite medium steep slope root-soil effect biotechnical reinforcement

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Numerical simulation for influence of excavation and blasting vibration on stability of mined-out area

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Journal of Central South University of Technology 2006年第5期13卷 577-583页

作者：徐国元闫长斌 School of Resources and Safety Engineering Central South University

Dynamic analysis steps and general flow of fast lagrangian analysis of continua in 3 dimensions(FLAC3D) were discussed. Numerical simulation for influence of excavation and blasting vibration on stability of mined-out area was carried out with FLAC3D. The whole analytical process was divided into two steps, including the static analysis and the dynamic analysis which were used to simulate the influence of excavation process and blasting vibration respectively. The results show that the shape of right upper boundary is extremely irregular after excavation, and stress concentration occurs at many places and higher tensile stress appears. The maximum tensile stress is higher than the tensile strength of rock mass, and surrounding rock of right roof will be damaged with tension fracture. The maximum displacement of surrounding rock is 4.75 mm after excavation. However, the maximum displacement increases to 5.47 mm after the blasting dynamic load is applied. And the covering area of plastic zones expands obviously, especially at the foot of right upper slope. The analytical results are in basic accordance with the observed results on the whole. Damage and disturbance on surrounding rock to some degree are caused by excavation, while blasting dynamic load increases the possibility of occurrence of dynamic instability and destruction further. So the effective supporting and vibration reducing measures should be taken during mining.

关键词： mined-out area excavation process blasting vibration stability numerical simulation FLAC3D

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Instability identification on large scale underground mined-out area in the metal mine based on the improved FRBFNN

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International Journal of Mining Science and Technology 2013年第6期23卷 821-826页

作者： Luo Zhouquan Zuo Hongyan Jia Nan Wang Yiwei School of Resource and Safety Engineering Central South University

To identify the instability on large scale underground mined-out area in the metal mine effectively,the parameters of radial basis function were determined through clustering method and the improved fuzzy radial basis function neural network(FRBFNN)model of instability identification model about large scale underground mined-out area in the metal mine was *** improved FRBFNN model was trained and *** results show that the improved FRBFNN model has high training accuracy and generalization *** such as pillar area ratio,filling level and the value of rock quality designation have strong influence on instability of large scale underground mined-out *** of analysis about the improved FRBFNN model was proved by the practical application results about instability discrimination of surrounding rock in large-scale underground mined-out area of a metal mine in south China.

关键词： Metal mine Fuzzy theory mined-out area RBF neural network Discrimination

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