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| RESEARCH ON SPACE-TIME ACTION RULE OF BOLT-NET-ANCHOR COUPLING SUPPORT FOR DEEP GATEWAY |
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Abstract Aiming at the characters of nonlinear mechanical process for surrounding rock in deep gateway excavation and support，the space-time action rule of bolt-net-anchor coupling support is researched by numerical simulation method and engineering application. The result indicates that，after the gateway surrounding rock is reinforced by the bolt-net coupling support，the optimal secondary support time to realize the space-time coupling among anchor，bolt-net and surrounding rock is that when the obvious deformation stage of the surrounding rock is completed or almost completed. Its main character is the transformation from high stress concentration to low stress zone through mobilizing the strength of inner surrounding rock by anchor coupling support. The gateway with bolt-net-anchor coupling support can meet the requirements of the stability control during gateway excavation and coal extraction.
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Received: 11 August 2006
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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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