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| RESEARCH ON CHARACTERISTICS OF ROCKBURST AND RULES OF MICROSEISMIC MONITORING AT DIVERSION TUNNELS IN
JINPING II HYDROPOWER STATION |
| ZHANG Wendong1，MA Tianhui1，TANG Chun′an1，TANG Liexian2 |
(1. Institute of Rock Instability and Seismicity Research，Dalian University of Technology，Dalian，Liaoning 116024，China；
2. School of Mining Engineering，University of Science and Technology Liaoning，Anshan，Liaoning 114051，China) |
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Abstract The characteristics and laws of rockburst at diversion tunnels in Jinping II hydropower station are summarized through analyzing a mass of rockburst incidents recorded during tunneling，including the law of distribution of rockburst along tunnel axis，the way of failure of rock surrounding tunnels，the distribution of rockburst incidents in tunnel cross-section，the relationship of rockburst and distance from working face，the relationship of rockburst and time after construction，the relationship between types of rockburst and the length of failure，etc. According to these laws and the relationship of the rockburst and the geologic structure，the laws of the effect of geologic structure on the mechanism of rockburst are analyzed. Rockbursts at deep tunnels in hydropower station are monitored and predicted by using microseismic monitoring technique to real-time monitor and analyze the microseismic incidents. Based on the results of microseismic monitoring of rockburst，the relationship of the temporal and spatial change rules of microseismic activity and rockburst incidents is preliminary discussed. The results of study show that there exists laws of temporal，spatial and intensity distribution of rockburst；geologic structure，construction method，construction disturbance and many other factors all have a significant effect on the behaviors of rockburst；and the geologic structure has a control function. There always be a process of gestation before rockburst，with a lot of micro-fractures emerging and microseismic energy losing(microseismic indication). Microseismic activities always occur ahead of rockburst，while the locations of them coincide with rockburst，thus the safety of construction can be guaranteed. The actual test in this project shows that it is available and reliable to predict rockburst using microseismic monitoring technique，so as to provide a new idea for prediction of rockburst and safe construction.
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Received: 22 March 2013
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| [1] 徐林生，王兰生，李天斌. 国内外岩爆研究现状综述[J]. 长江科学院院报，1999，16(4)：24–27.(XU Linsheng，WANG Lansheng，LI Tianbin. Present situation of rockburst research at home and abroad[J]. Journal of Yangtze River Scientific Research Institute，1999，16(4)：24–27.(in Chinese))
[2] 徐林生，王兰生. 二郎山公路隧道岩爆特征与预测研究[J]. 岩土工程学报，1999，21(5)：569–572.(XU Linsheng，WANG Lansheng. Study of the laws of rockburst and its forecasting in the tunnel of Erlang mountain road[J]. Chinese Journal of Geotechnical Engineering，1999，21(5)：569–572.(in Chinese))
[3] 杨 健，武 雄. 岩爆综合预测评价方法[J]. 岩石力学与工程学报，2005，24(3)：411–416.(YANG Jian，WU Xiong. Comprehensive forecasting method for estimating rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(3)：411–416.(in Chinese))
[4] 徐林生，王兰生，李永林. 岩爆形成机制与判据研究[J]. 岩土力学，2002，23(3)：300–303.(XU Linsheng，WANG Lansheng，LI Yonglin. Study of mechanism and judgment of rockbursts[J]. Rock and Soil Mechanics，2002，23(3)：300–303.(in Chinese))
[5] ORTLEPP W D，STACEY T R. Rockburst mechanisms in tunnels and shafts[J]. Tunnelling and Underground Space Technology，1994，9(1)：59–65.
[6] 徐林生. 地下工程岩爆发生条件研究[J]. 重庆交通学院学报，2005，24(3)：31–34.(XU Linsheng. Research of rockburst formation condition in underground engineering[J]. Journal of Chongqing Jiaotong University，2005，24(3)：31–34.(in Chinese))
[7] 徐则民，黄润秋，罗杏春，等. 静荷载理论在岩爆研究中的局限性及岩爆岩石动力学机制的初步分析[J]. 岩石力学与工程学报，2003，22(8)：1 255–1 262.(XU Zemin，HUANG Runqiu，LUO Xingchun，et al. Limitations of static load theory in rockburst research and preliminary analysis of dynamics mechanism of rockburst[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(8)：1 255–1 262.(in Chinese))
[8] 何满潮，苗金丽，李德建，等. 深部花岗岩试样岩爆过程试验研究[J]. 岩石力学与工程学报，2007，26(5)：865–876.(HE Manchao，MIAO Jinli，LI Dejian，et al. Experimental study on rockburst processes of granite specimen at great depth[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：865–876.(in Chinese))
[9] 张黎明，王在泉，王建新，等. 岩石卸荷破坏的试验研究[J]. 四川大学学报：工程科学版，2006，38(3)：34–37.(ZHANG Liming，WANG Zaiquan，WANG Jianxin，et al. Experimental study of the rock behavior under unloading condition[J]. Journal of Sichuan University：Engineering Science，2006，38(3)：34–37.(in Chinese))
[10] 张黎明，王在泉，贺俊征. 岩石卸荷破坏与岩爆效应[J]. 西安建筑科技大学学报：自然科学版，2007，39(1)：110–114.(ZHANG Liming，WANG Zaiquan，HE Junzheng. Analysis of failure characteristics of rock under unloading conditions and their effects on rockburst[J]. Journal Xi?an University of Architecture and Technology：Natural Science，2007，39(1)：110–114.(in Chinese))
[11] 张黎明，王在泉，孙 辉，等. 岩石卸荷破坏的变形特征及本构模型[J]. 煤炭学报，2009，34(12)：1 626–1 631.(ZHANG Liming，WANG Zaiquan，SUN Hui，et al. Failure characteristics and constitutive model of rock under unloading condition[J]. Journal of China Coal Society，2009，34(12)：1 626–1 631.(in Chinese))
[12] 张黎明，王在泉，石 磊. 硬质岩石卸荷破坏特性试验研究[J]. 岩石力学与工程学报，2011，30(10)：2 012–2 018.(ZHANG Liming，WANG Zaiquan，SHI Lei. Experimental study of hard rock failure characteristic under unloading condition[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：2 012–2 018.(in Chinese))
[13] 姜繁智，向晓东，朱东升. 国内外岩爆预测的研究现状与发展趋势[J]. 工业安全与环保，2003，29(8)：19–22.(JIANG Fanzhi，XIANG Xiaodong，ZHU Dongsheng. The current status and developing tendency of rock blasting forecast at home and abroad[J]. Industrial Safety and Environmental Protection，2003，29(8)：19–22.(in Chinese))
[14] 周宏伟，谢和平，左建平. 深部高地应力下岩石力学行为研究进展[J]. 力学进展，2005，35(1)：91–99.(ZHOU Hongwei，XIE Heping，ZUO Jianping. Developments in researches on mechanical behaviors of rocks under the condition of high ground pressure in the depths[J]. Advances in Mechanics，2005，35(1)：91–99.(in Chinese))
[15] 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))
[16] 张津生，陆家佑，贾愚如. 天生桥二级水电站引水隧洞岩爆研究[J]. 水力发电，1991，(10)：34–37.(ZHANG Jinsheng，LU Jiayou，JIA Yuru. Study of rockburst in the tunnel in Tianshengqiao II hydropower station[J]. Water Power，1991，(10)：34–37.(in Chinese))
[17] 周德培，洪开荣. 太平驿隧洞岩爆特征及防治措施[J]. 岩石力学与工程学报，1995，14(2)：171–178.(ZHOU Depei，HONG Kairong. The rockburst features of Taipingyi tunnel and the prevention methods[J]. Chinese Journal of Rock Mechanics and Engineering，1995，14(2)：171–178.(in Chinese))
[18] 徐林生，王兰生. 二郎山公路隧道岩爆发生规律与岩爆预测研究[J]. 岩土工程学报，1999，21(5)：569–572.(XU Linsheng，WANG Lansheng. Study of the laws of rockburst and its forecasting in the tunnel of Erlang mountain road[J]. Chinese Journal of Geotechnical Engineering，1999，21(5)：569–572.(in Chinese))
[19] 谷明成，何发亮，陈成宗. 秦岭隧道岩爆的研究[J]. 岩石力学与工程学报，2002，21(9)：1 324–1 329.(GU Mingcheng，HE Faliang，CHEN Chengzong. Study of rockburst in Qinling tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(9)：1 324– 1 329.(in Chinese))
[20] 李春杰，李洪奇. 秦岭隧道岩爆特征与施工处理[J]. 世界隧道，1999，(1)：36–41.(LI Chunjie，LI Hongqi. Rockburst characteristics and treatment methods in Qinling tunnel[J]. Tunnelling and Underground Works，1999，(1)：36–41.(in Chinese))
[21] 唐礼忠，潘长良，杨承祥，等. 冬瓜山铜矿微震监测系统及其应用研究[J]. 金属矿山，2006，364(10)：41–44.(TANG Lizhong，PANG Changliang，YANG Chengxiang，et al. Establishment and application of microseismicity monitoring system in Dongguashan copper mine[J]. Metal Mine，2006，364(10)：41–44.(in Chinese))
[22] 李庶林，尹贤刚，郑文达，等. 凡口铅锌矿多通道微震监测系统及其应用研究[J]. 岩石力学与工程学报，2005，24(12)：2 048–2 053. (LI Shulin，YIN Xiangang，ZHENG Wenda，et al. Research of multi-channel microseismic monitoring system and its application to Fankou lead-zinc mine[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(12)：2 048–2 053.(in Chinese))
[23] 姜福兴，XUN Luo，杨淑华. 采场覆岩空间破裂与采动应力场的微震探测研究[J]. 岩土工程学报，2003，25(1)：23–25.(JIANG Fuxing，XUN Luo，YANG Shuhua. Study on microseismic monitoring for spatial structure of overlying strata and mining pressure field in longwall face[J]. Chinese Journal of Geotechnical Engineering，2003，25(1)：23–25.(in Chinese))
[24] 谭以安. 岩爆特征及岩体结构效应[J]. 中国科学：B辑，1991，(9)：985–991.(TAN Yi?an. Characteristics of rockburst and structural effect on rock mass[J]. Science in China：Series B，1991，(9)：985–991.(in Chinese))
[25] 徐奴文，唐春安，沙 椿，等. 锦屏一级水电站左岸边坡微震监测系统及其工程应用[J]. 岩石力学与工程学报，2010，29(5)：915–925.(XU Nuwen，TANG Chun?an，SHA Chun，et al. Microseismic monitoring system establishment and its engineering applications to left bank slope of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：915–925.(in Chinese))
[26] 李庶林. 试论微震监测技术在地下工程中的应用[J]. 地下空间与工程学报，2009，5(1)：122–128.(LI Shulin. Discussion on microseismic monitoring technology and its applications to underground projects[J]. Chinese Journal of Underground Space and Engineering，2009，5(1)：122–128.(in Chinese)) |
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2014, Vol. 33 
