岩爆孕育过程的动态调控

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摘要针对岩爆孕育过程的特征、规律和机制，提出“优化开挖方案减少应力和能量聚集→预释放和转移能量→设计合理的支护参数吸收能量”的岩爆“三步走”防控理论以及在此基础上基于开挖过程中微震信息时空演化的岩爆动态调控理论。在施工过程中，根据实测到的微震信息演化规律进行岩爆等级预警，据此进行反馈分析和动态调控，运用“三步走”防控对策进行及时的开挖速率和支护措施动态调控，以尽可能避免岩爆的发生、降低岩爆发生的等级或延迟岩爆发生的时间。所建议的方法成功地应用于埋深1 900～2 525 m的锦屏二级水电站深埋引水隧洞和排水洞的施工开挖过程中，应用过程和结果验证了所建议方法的适用性。

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关键词 ：岩石力学, 岩爆, 孕育过程, 动态调控, 微震

Abstract：According to mechanism，characterization and law of rockburst evolution process，a three-step strategy to control rockburst was firstly proposed. It includes the first step to optimize excavation schemes to reduce concentration of stress and energy induced by the excavation；the second step to pre-release and transfer energy concentration；and the third step to absorb energy stored in rock mass by designing reasonable rockbolts and other support types. And then a dynamic control method of rockburst evolution process is proposed. During the construction，the real-time microseismicity monitoring is used to perform warning of rockburst. The feedback analysis and dynamic control strategy if needed can be conducted to perform the three-step control strategy of rockburst evolution process. The proposed method has been successfully used in Jinping II deep headrace and water drainage tunnels with depths of 1 900–2 525 m. The practice verified the applicability of the proposed method.

Key words： rock mechanics rockburst evolution process dynamic control microseismicity

收稿日期: 2012-05-23

引用本文:

冯夏庭，张传庆，陈炳瑞，丰光亮，赵周能，明华军，肖亚勋，段淑倩，周辉. 岩爆孕育过程的动态调控[J]. 岩石力学与工程学报, 2012, 31(10): 1983-1997.
FENG Xiating，ZHANG Chuanqing，CHEN Bingrui，FENG Guangliang，ZHAO Zhouneng，. DYNAMICAL CONTROL OF ROCKBURST EVOLUTION PROCESS. , 2012, 31(10): 1983-1997.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I10/1983

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