岩爆的相似材料物理模拟研究

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摘要根据不同配合比相似材料的物理力学性质测试结果，选取最具岩爆倾向的相似材料，结合一水电站引水隧洞典型断面，制作大尺寸模型，采取后开孔的隧洞成洞方式进行岩爆物理模拟试验研究。结果表明：在模型的边界条件保持工程区天然应力状态下，隧洞开挖过程中拱顶、拱肩和边墙部位在不同的时间段内分别有较明显的应力、应变突变现象，围岩声发射次数也表现出剧烈增大现象，说明围岩出现明显的岩爆表征。模型在超载条件下出现围岩剥落、鼓折和开裂现象，表明原型隧道段以剥落、鼓折式张性岩爆为主。

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关键词 ：岩石力学, 岩爆, 物理模拟, 相似材料, 应变突变, 剥落、鼓折与开裂

Abstract：According to the test results of physico-mechanical properties of similar materials with various mixture ratios，a type of similar material with the most obvious tendency of rockburst is selected to produce a large-size model and to perform the physical simulation test of rockburst. The physical simulation test is carried out by means of opening hole simulating tunnel after model loading，combined with a typical section of diversion tunnel in a hydropower station. The study results show that，under the condition of natural stress state in the model boundaries，the arch crown，spandrel and side walls of tunnel respectively produce the obvious catastrophic phenomena of stress and strain；and the acoustic emission counts of surrounding rock also increase rapidly after tunnel excavation，showing the clear features of rockburst. The spalling，buckling and cracking phenomena of surrounding rock appear in model under over loading conditions. It is concluded that the tunnel in the hydropower station will mainly occur the tensile rockburst with the patterns of spalling，buckling and cracking.

Key words： rock mechanics rockburst physical simulation similar materials strain catastrophe spalling buckling and cracking

收稿日期: 2010-03-31

引用本文:

李天斌1，王湘锋1，2，孟陆波1. 岩爆的相似材料物理模拟研究[J]. 岩石力学与工程学报, 2011, 30(S1): 2610-2616.
LI Tianbin1，WANG Xiangfeng1，2，MENG Lubo1. PHYSICAL SIMULATION STUDY OF SIMILAR MATERIALS FOR ROCKBURST. , 2011, 30(S1): 2610-2616.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS1/2610

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