近场岩爆辐射能模型及支护系统可靠度评价研究

The new scientific questions,such as radiated energy can't be calculated inaccurately and rockburst intensity can't be evaluated by quantitative analyzing, were encountered during rockburst prevention and control of rockburst near field in deep rock engineering.To solve these problems, rock mechanics, geophysics, swarm intelligence and theory of degree of reliability will be utilized comprehensively. Firstly, a series of microseismicty monitoring tests will be carried out near field, attenuation law of radiated energy and frequency spectrum characteristics are obtained, microseismicity source radiated energy model is studied near field, and real-time intelligent inverse analysis method of microseis source radiated energy is put forward near field. Then, rockburst phenomena and radiated energy are re-analyzed based 133 near-field rockburst occuring in Jinping II hydropower station using the proposed radiated energy model and the relation of radiated energy and intensity classification of rockburst is studied, comprehensively quantitative evaluation method of rockburst intensity classification is proposed based on rockburst phenomena and radiated energy and rockburst intensity classification quantitative evaluation table is established. On the basis of the studies above, through strong noise near field microseismic monitoring test and protective measures study considering energy absorption, supporting measure for protecting different intensity rockburst is established and a real-time reliability evaluation method of rockburst supporting measure based on microseismic information is proposed. The applicability and superiority of the proposed evaluation method are verified by near-field micorseismic monitoring test in Baihetan hydropower station underground powerhouse. Th research will provide more reliable and accurate analysis of the theory and method for analysis, evaluation and prevention and control of rockburst and have the important theoretical meaning and engineering value.

针对深埋岩石工程岩爆防治过程中遇到的近场岩爆辐射能计算不准确、破坏烈度难以准确定量评价等新的科学问题，综合利用岩石力学、地球物理学、群智能、可靠度分析等多种理论与方法，首先，通过一系列近场微震监测试验，分析近场微震源辐射能衰减规律和波形频谱特征，研究近场微震源辐射能模型，提出近场微震源辐射能实时智能反分析方法；接着，对锦屏二级水电站133次近场岩爆进行统计分析和辐射能重评估，研究岩爆辐射能与岩爆破坏烈度之间的内在联系，提出考虑岩爆表观现象和辐射能的岩爆烈度等级定量综合评价方法，建立岩爆烈度等级定量评价表；以上述研究为基础，通过强噪音下近场微震监测试验及岩爆防护措施吸能研究，最终建立一套基于微震监测信息的近场岩爆支护系统可靠度实时评价方法，并通过白鹤滩水电站地下厂房现场监测验证其适用性与优越性，为岩爆分析、评估与防治提供更为可靠、精准的分析理论与方法，具有重要理论意义和工程价值。

岩爆的微震事件能量评估是岩爆烈度等级划分重要组成部分，对现场岩爆的防范和控制具有重要指导意义。针对深埋岩石工程岩爆防治过程中遇到的近场岩爆辐射能计算不准确、破坏烈度难以准确定量评价等新的科学问题，综合利用了岩石力学、地球物理学、群智能、可靠度分析等多种理论与方法。首先，通过一系列近场微震监测试验，分析了近场微震源辐射能衰减规律和波形频谱特征，研究了近场微震源辐射能模型，提出了近场微震源辐射能实时智能反分析方法，较好地解决了近场微震源辐射能计算值偏大的问题。接着，对锦屏二级水电站133次近场岩爆进行了统计分析和辐射能重评估，研究了岩爆辐射能与岩爆破坏烈度之间的内在联系，提出了考虑岩爆表观现象和辐射能的岩爆烈度等级定量综合评价方法，建立岩了爆烈度等级定量评价表，岩爆能量和岩爆烈度评价的准确性进一步得到提升。以上述研究为基础，通过强噪音下近场微震监测试验及岩爆防护措施吸能研究，最终建立了一套基于微震监测信息的近场岩爆支护系统可靠度实时评价方法，并通过白鹤滩水电站地下厂房现场监测验证其适用性与优越性，为岩爆分析、评估与防治提供更为可靠、精准的分析理论与方法，具有重要理论意义和工程价值。