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浙江大学学报(工学版)
浙江大学学报(工学版)  2017, Vol. 51 Issue (11): 2175-2181    DOI: 10.3785/j.issn.1008-973X.2017.11.011
土木与交通工程     
爆孕育过程的微震源事件空间分形行为
于洋1, 徐长节1,2, 朱陈1, 徐倩1
1. 华东交通大学 岩土工程基础设施安全与控制重点实验室, 江西 南昌 330013;
2. 浙江大学 城市与滨海岩土工程研究中心, 浙江 杭州 310058
Spatial fractal research of micro-seismic events associated with rockburst hazard
YU Yang1, XU Chang-jie1,2, ZHU Chen1, XU Qian1
1. Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiao Tong University, Nanchang 330013, China;
2. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
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摘要：

为了分析岩爆过程中微破裂事件的自相似特征，提出微震源事件空间分形计算方法.运用该方法，针对锦屏山水电站TBM及钻爆法2种不同开挖方式下，岩爆灾害孕育及发生所获得的微震信息进行研究.结果表明：对于深部岩体隧洞施工过程中发生的岩爆灾害，微震事件的空间分布是具有分形结构的；微震事件空间分形维数具有随着岩爆的孕育过程不断减小，当岩爆发生时达到最小值的特征；TBM开挖方式下的微震事件空间分形维数分布在0.6~1.8的范围内，钻爆法开挖方式下分布在1.2~2.0的范围内；微震事件空间分形维数与微震能量释放之间表现出明显的反比例关系.
Abstract:

A fractal calculation method was proposed in order to analyze the self-similarity of the spatial distribution of micro-seismic events during the development of rockburst hazard. The proposed method was used to analyze the fractal behaviour of micro-seismic events during the preparation and germination process of rockbursts that occurred in deep tunnels of Jinping mountain hydropower station, which was induced by the excavation of the tunnel-boring machine (TBM) and the drill-and-blast method (DBM). The spatial distribution of micro-seismic events during the evolution of rockburst displayed fractal structure. The daily spatial fractal dimensions of micro-seismic events decreased during the preparation and germination process of rockburst, and were reduced to the minimum value as rockburst occurring. The spatial fractal dimensions were 0.6~1.8 by TBM excavation and 1.2~1.0 by DBM excavation. There was a inversely proportional relationship between spatial fractal dimension and micro-seismic energy release.
收稿日期: 2016-11-19 出版日期: 2017-11-13
CLC:  TU45  
基金资助:

国家自然科学基金资助项目（51509092）；江西省自然科学基金资助项目（20161BAB216141）；岩土力学与工程国家重点实验室开放基金项目（Z015004）；江西省交通厅科研项目（2017D0036）；江西省教育厅科研项目（150518）.
作者简介: 于洋(1982-),男,博士,讲师,从事深部岩体力学方面等研究.ORCID:0000-0002-4409-7970.E-mail:lukeryuyang@163.com
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引用本文:

于洋, 徐长节, 朱陈, 徐倩. 爆孕育过程的微震源事件空间分形行为[J]. 浙江大学学报(工学版), 2017, 51(11): 2175-2181.

YU Yang, XU Chang-jie, ZHU Chen, XU Qian. Spatial fractal research of micro-seismic events associated with rockburst hazard. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(11): 2175-2181.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.11.011    或    http://www.zjujournals.com/eng/CN/Y2017/V51/I11/2175

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