Influence of depth-thickness ratio of mining on the stability of a bedding slope with its sliding surface in concave deformation |
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| Affiliation: | 1. School of Mines, China University of Mining and Technology, Xuzhou 221116, China;2. Jining No. 2 Coal Mine, Yankuang Group, Jining 272071, China;1. Institut de Mécanique des Fluides de Toulouse, UMR CNRS-INPT/UPS No. 5502, France;2. Institut de Mathématiques de Toulouse, CNRS and Université Paul Sabatier, Toulouse, France;1. School of Civil Engineering, Wuhan University, Wuhan 430072, China;2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;1. School of Resource & Safety Engineering, China University of Mining & Technology, Beijing 100083, China;2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, China;1. Geotechnical Engineer, Mahyar Haffar Karmania Company., Kerman, Iran;2. Department Mining & Metallurgy, Amirkabir University of Technology, Tehran 158754413, Iran |
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| Abstract: | In order to study the influence of depth-thickness ratio on bedding slope stability, whose sliding surface is flexural concave in shape under mining conditions, this paper aims to study the characteristics of deformation and damage of bedding sliding with depth-thickness ratios of 200:1, 150:1, 120:1, 100:1 and 50:1 by adopting numerical simulation analysis software combined with laboratory-made “under the influence of mining variable sliding surface slope similar simulation test bed”, and to propose identification methods for slope stability under the influence of mining. The results show that mining activities under the slope reduce slope stability. With a decrease in the mining depth ratio, the influence of mining on the slope increases gradually, and the damage to the slope gradually expands, the stability of the slope gradually reduces, fracture occurs on the slope toe and the central fissure gradually develops to the surface, and reaches slide threshold when the depth-thickness ratio is 50:1. |
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| Keywords: | Depth-thickness ratio Bedding slope Sliding surface Concave deflection surface Mining influence Similar simulation |
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