|
|
|
| PHYSICAL SIMULATION STUDY OF SIMILAR MATERIALS FOR ROCKBURST |
| LI Tianbin1，WANG Xiangfeng1，2，MENG Lubo1 |
| (1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu，Sichuan 610059，China；2. Sichuan Communication Surveying and Design Institute，Chengdu，Sichuan 610017，China) |
|
|
|
|
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.
|
|
Received: 31 March 2010
|
|
|
|
| [1] ORTLEPP W D. Grouted rock-studs as rockburst support[J]. Journal of the South African Institute of Mining and Metallurgy，1994，94(2)：47–63.
[2] 徐文胜，许迎年，王元汉，等. 岩爆模拟材料的筛选试验研究[J]. 岩石力学与工程学报，2000，19(增1)：873–877.(XU Wensheng，XU Yingnian，WANG Yuanhan，et al. Experimental study on simulation materials of rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2009，19(Supp.1)：873–877.(in Chinese))
[3] 潘一山，章梦涛，王来贵，等. 地下硐室岩爆的相似材料模拟试验研究[J]. 岩土工程学报，1997，19(4)：49–56.(PAN Yishan，ZHANG Mengtao，Wang Laigui，et al. Study on rockburst by equivalent material simulation tests[J]. Chinese Journal of Geotechnical Engineering，1997，19(4)：49–56.(in Chinese))
[4] 许东俊，章 光，李廷芥. 岩爆应力状态研究[J]. 岩石力学与工程学报，2000，19(2)：169–172.(XU Dongjun，ZHANG Guang，LI Tingjie. On the stress state in rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(2)：169–172.(in Chinese))
[5] 祝方才. 不同应力路径下相似材料模型破坏的试验研究[J]. 中南工业大学学报，2002，33(增1)：8–11.(ZHU Fangcai. Study on failure models of simulated material under different stress paths[J]. Journal of Central South University of Technology，2002，33(Supp.1)：8–11.(in Chinese))
[6] 祝方才，宋锦泉. 岩爆的力学模型及物理数值模拟述评[J]. 中国工程科学，2003，5(3)：83–89.(ZHU Fangcai，SONG Jinquan. Mechanical models of rockburst and its physical and numerical modeling study[J]. Engineering Science，2003，5(3)：83–89.(in Chinese))
[7] 张晓春，杨挺青，缪协兴. 冲击矿压模拟试验研究[J]. 岩土工程学报，1999，21(1)：66–70.(ZHANG Xiaochun，YANG Tingqing，MIAO Xiexing. The simulation test on rockburst in coal mines[J]. Chinese Journal of Geotechnical Engineering，1999，21(1)：66–70.(in Chinese))
[8] NAKAYAMA Y，INOUE A，TANAKA M，et al. A laboratory experiment for development of acoustic methods to investigate condition changes induced by excavation around a chamber[C]// Proceedings of the 3rd International Symposium on Rockbursts and Seismicity in Mines. Rotterdam：Balkema，1993：383–385.
[9] 张晓春，缪协兴，杨挺青. 冲击矿压的层裂板模型及试验研究[J]. 岩石力学与工程学报，1999，18(5)：507–511.(ZHANG Xiaochun，MIAO Xiexing，YANG Tingqing. The layer-crack-plate model and testing study of the rockburst in mines[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(5)：507–511.(in Chinese))
[10] 李连贵，徐文胜，许迎年，等. 岩爆模拟材料研制及模拟试验分析[J]. 华中科技大学学报，2001，29(6)：80–82.(LI Liangui，XU Wensheng，XU Yingnian，et al. Experimental study on simulation materials of rockburst[J]. Journal of Huazhong University of Science and Technology，2001，29(6)：80–82.(in Chinese))
[11] 费鸿禄，徐小荷，唐春安. 岩爆的物理模拟及其机制的研究[J]. 中国矿业，2000，9(6)：35–37.(FEI Honglu，XU Xiaohe，TANG Chun′an. Study on rockburst by means of physical simulation[J]. China Mining Magazine，2000，9(6)：35–37.(in Chinese))
[12] 许迎年，徐文胜，王元汉，等. 岩爆模拟试验及岩爆机制研究[J]. 岩石力学与工程学报，2002，21(10)：1 462–1 466.(XU Yingnian，XU Wensheng，WANG Yuanhan，et al. Simulation testing and mechanism studies on rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(10)：1 462–1 466.(in Chinese))
[13] 杨淑清. 隧洞岩爆机制物理模型试验研究[J]. 武汉水利电力大学学报，1993，26(2)：160–166.(YANG Shuqing. An experimental study on rockburst mechanism around tunnels by physical simulation[J]. Journal of Wuhan University of Hydraulic and Electric Engineering，1993，26(2)：160–166.(in Chinese))
[14] 杨淑清，陆家佑. 隧洞岩爆机制物理模型试验研究[C]// 第三届全国岩石动力学学术会议论文集. 武汉：武汉测绘科技大学出版社，1992：485–494.(YANG Shuqing，LU Jiayou. An experimental study on rockburst mechanism around tunnels by physical simulation[C]// Proceedings of the 3rd National Conference on Rock Dynamics. Wuhan：Wuhan Technical University of Surveying and Mapping Press，1992：485–494.(in Chinese))
[15] FUMAGALLI E. 静力学模型与地力学模型[M]. 蒋彭年译. 北京：水利水电出版社，1979.(FUMAGALLI E. Statics models and geomechanics models[M]. Translated by JIANG Pengnian. Beijing：China Water Power Press，1979.(in Chinese)) |
|
|
|
2011, Vol. 30 
