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| MODEL TEST RESEARCH ON SHAFT LINING BUILT IN HIGH PRESSURE ROCK AQUIFER |
| ZHOU Xiaomin1，ZHOU Guoqing2，HU Qisheng1，MA Chengxuan1 |
(1. School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China；
2. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221008，China) |
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Abstract In light of the aquifer rock condition of coal mines western in China，the relationship of similarity criterion related to steady model tests of interaction of water，surrounding rock and shaft lining are firstly studied. Then the shaft test device have been developed according to the mechanical model of plane strain shaft in infinite ground，showing especially in the aspects of structure and technology of gravity loading and pore water pressure loading system. According to the orthogonal tests table of L9(34)，a series of tests of shaft system under high water pressure are carried out. Upon the analysis theory of orthogonal tests，the sequences of factors which influence the inner side displacement of shaft lining are revealed as follows：the first is water pressure，the second is the thickness of surrounding rock and the third is shearing modulus；lining thickness is listed as the 4th influencing factor. Through monitoring and data study during testing process，the basic laws of inner side displacement and hoop strain of concrete lining developed by high water pressure are revealed. As the rupture state is coming in the testing process，compression deformation speeds up in the inner side of shaft lining，while the outer side of lining is under a sharp change from the state of hoop tension to compression，showing a brittle failure behavior of plain concrete. This newly discovery is worth further exploring.
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Received: 20 May 2011
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2011, Vol. 30 
