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Geomechanics and Engineering Volume 21, Number 3, May10 2020 , pages 301-313 DOI: https://doi.org/10.12989/gae.2020.21.3.301 |
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Study on the distribution law of stress deviator below the floor of a goaf |
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Zhaolong Li, Renliang Shan, Chunhe Wang, Honghu Yuan and Yonghui Wei
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| Abstract | ||
| In the process of mining closely spaced coal seams, the problem of roadway arrangement in lower coal seams has long been a concern. By means of mechanical model calculation and numerical simulation postprocessing, the distribution of the stress deviator below the floor of a goaf and the evolution of the stress deviator in the vertical and horizontal directions are studied under the influence of horizontal stress. The results of this theoretical study and numerical simulation show that the stress deviator decreases exponentially with increasing depth from the floor below the coal side. With the increase in the horizontal stress coefficient | ||
| Key Words | ||
| closely spaced coal seams; roadway layout; stress deviator; horizontal stress | ||
| Address | ||
| Zhaolong Li, Renliang Shan,Honghu Yuan and Yonghui Wei: School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China Chunhe Wang: 1.) School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China 2.) China Construction Communications Engineering Group Corporation Limited, Beijing 100161, China | ||