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Citation |
Gao L, Wang J, Kong D, Wu G, Ma Z. China Saf. Sci. J. 2020; 30(3): 67-73. |
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Copyright |
(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao) |
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DOI |
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PMID |
unavailable |
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Abstract |
In order to solve difficulty of surrounding rock control under influence of dynamic pressure, with uphill coal transportation roadway of a mine in Guizhou province as engineering background, main features of surrounding rock deformation of such kind of roadway were clarified through field investigation. Then, spatial and temporal distribution characteristics of plastic zone, stress field and displacement field were obtained by numerical simulation analysis, and condition for shear-slip-fault occurrence of coal-rock interface was analyzed theoretically. Then, through analysis on action principle of overlap arch bearing structure, it was found that failure mechanism of original " bolt + mesh + shotcrete + anchor cable" support was disappearance of main compression arch and effect limitation of subordinate compression arch. Finally, repairing principle and a scheme were put forward with the core of collaborative control of "grouting after covering U-steel shed + asymmetric and inclined cross-layer locking clamp cables". The practice shows that serious asymmetric deformation of surrounding rock can be effectively controlled with the proposed scheme. © 2020 China Safety Science Journal. All rights reserved. Language: zh |