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title£ºCompression-shear Strength Criterion of Coal-rock Combination Model Considering Interface Effect

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tshgth: ½ð±Ò+5, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·Ç³£¸Ðл 2015-04-13 14:12:32
sunshan4379: LS-EPI+1, ¸ÐлӦÖú£¡ 2015-04-13 16:45:47
Compression-shear strength criterion of coal-rock combination model considering interface effect
×÷Õß:Zhao, ZH (Zhao, Zenghui)[ 1,2,3 ] ; Wang, WM (Wang, Weiming)[ 4 ] ; Wang, LH (Wang, Lihua)[ 4 ] ; Dai, CQ (Dai, Chunquan)[ 4 ]
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
¾í: 47  Ò³: 193-199
DOI: 10.1016/j.tust.2015.01.007
³ö°æÄê: MAR 2015
²é¿´ÆÚ¿¯ÐÅÏ¢
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Surrounding rocks around coal tunnel in western mining area of China are typical composite structures composed of weakly cemented soft rock and hard coal, and the tunnel stability is closely related to the overall mechanical behavior of the combination body. The equivalent homogeneous model of coal-rock combination body and its stress state expressions were firstly established based on the strain energy equivalency principle. Then, the general compression-shear failure criterion of the equivalent model which takes into account the cohesive strength of the interface between coal and soft rock was derived by assuming that the yielded mediums all met Mohr-Coulomb criterion. Furthermore, accuracy of the proposed analytical model was verified by carrying out laboratory test for coal-mudstone specimen, and it found that the theoretical results were in good agreement with the test values. Strength of the combination body lies between the strong body and weak body. Finally, the effects of interface cohesion strength, rock thickness and stress level on the failure behavior of combination model were analyzed based on the analytical model. Results show that the proposed model not only contains the classical sliding failure theory for two-dimensional weak plane presented by Jaeger, but also reflect strength behavior of a more complex composite model composed of different rock mediums and structural plane. Thus, the analytical model provides theoretical basis for further studying the mechanical behavior of coal-rock combination model. (C) 2015 Elsevier Ltd. All rights reserved.
¹Ø¼ü´Ê
×÷Õ߹ؼü´Ê:Coal-rock combination body; Equivalent model; Compression-shear strength criterion; Interface effect
KeyWords Plus:MECHANISM
×÷ÕßÐÅÏ¢
ͨѶ×÷ÕßµØÖ·: Zhao, ZH (ͨѶ×÷Õß)
ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China.
µØÖ·:
ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        [ 1 ] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China
ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        [ 2 ] Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China
              [ 3 ] Shandong Univ Sci & Technol, Coll Min & Safety Engn, Qingdao 266590, Peoples R China
ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ        [ 4 ] Shandong Univ Sci & Technol, Coll Civil Engn & Architecture, Qingdao 266590, Peoples R China
µç×ÓÓʼþµØÖ·:tgzyzzh@163.com
»ù½ð×ÊÖúÖÂл
»ù½ð×ÊÖú»ú¹¹        ÊÚȨºÅ
National Natural Science Foundation of China        
51174128
41472280
51274133
51474137
Specialized Research Fund for the Doctoral Program of Higher Education of China        
20123718110007
²é¿´»ù½ð×ÊÖúÐÅÏ¢   
³ö°æÉÌ
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Àà±ð / ·ÖÀà
Ñо¿·½Ïò:Construction & Building Technology; Engineering
Web of Science Àà±ð:Construction & Building Technology; Engineering, Civil
ÎÄÏ×ÐÅÏ¢
ÎÄÏ×ÀàÐÍ:Article
ÓïÖÖ:English
Èë²ØºÅ: WOS:000350518700019
ISSN: 0886-7798
ÆÚ¿¯ÐÅÏ¢
Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports®
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IDS ºÅ: CC6ZY
Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 40
Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0
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