高黎贡山隧道岩爆声发射监测与数值分析
发布时间：2018-11-19 08:21
【摘要】：在国家经济迅速发展的大背景之下，地下工程修建数量越来越多，埋深越来越大。地下工程由于其周围复杂的地质环境与地上工程有较大不同，尤其在大埋深下进行工程建设活动，时常会遇到岩爆等围岩动力失稳现象，给地下施工人员生命安全及施工设备带来严重的威胁，因此准确的岩爆预报工作至关重要。基于岩爆机理与岩爆判据，国内外学者提出了丰富的理论，然而影响岩爆发生因素的复杂性，每一种岩爆机理与判据由于其考察因素有限，因而具有局限性，这就限制了岩爆准确预报与分级。同时岩体声发射监测技术的进步及广泛应用，这就给岩爆预报带来更多的参考依据。 本文依托独龙江公路改建工程高黎贡山隧道建设背景之下，基于实测地应力与相关工程资料、岩爆声发射监测、岩爆事件记录、数值分析等，对高黎贡山隧道岩爆倾向性、岩爆预报、岩爆发生规律与特征、岩爆判据等方面进行研究。主要研究内容如下： 1基于实测地应力、地质资料及已有工程资料，研究了高黎贡山隧道岩爆倾向性。 2基于声发射监测结果及岩爆记录，对高黎贡山隧道岩爆预测与定级，研究了典型岩爆事件及声发射监测数据特征，总结岩爆发生规律与特征及相应防治措施，，给出高黎贡山隧道声发射岩爆预报判据。 3基于ANSYS软件平台，对高黎贡山隧道岩爆数值分析，研究了围岩应力分布特征，应用多种基于应力与强度关系的岩爆判据，分析岩爆烈度与分布位置，并与典型岩爆事件进行对比分析，得出了Barton判据及Russenes判据较适用于高黎贡山隧道岩爆烈度分级，并且给出了建议的岩爆烈度分级。
[Abstract]:Under the background of the rapid development of national economy, more and more underground projects are built and buried deeper and deeper. Because the complex geological environment around the underground engineering is quite different from that of the above ground engineering, the dynamic instability of surrounding rock, such as rock burst, is often encountered in engineering construction activities under large buried depth. It poses a serious threat to the safety of underground construction personnel and construction equipment, so accurate rock burst prediction is very important. Based on the rock burst mechanism and rock burst criterion, scholars at home and abroad have put forward a rich theory. However, the complexity of the factors affecting the occurrence of rock burst, each kind of rock burst mechanism and criterion is limited because of its limited investigation factors. This limits the accurate prediction and classification of rockburst. At the same time, the progress and wide application of acoustic emission monitoring technology of rock mass bring more reference to rock burst prediction. Based on the background of the construction of Goligong Mountain Tunnel in Dulong River Highway Reconstruction Project, based on the measured in-situ stress and related engineering data, rock burst acoustic emission monitoring, rock burst event record, numerical analysis, etc., the tendency of rock burst in Gaoligongshan tunnel is analyzed in this paper. The prediction of rock burst, the regularity and characteristics of rock burst, and the criterion of rock burst are studied. The main contents are as follows: 1 based on the measured ground stress, geological data and existing engineering data, the tendency of rock burst in Gaoligongshan Tunnel is studied. 2 based on acoustic emission monitoring results and rock burst records, the typical rock burst events and the characteristics of acoustic emission monitoring data are studied for prediction and classification of rock burst in Gaoligongshan Tunnel, and the occurrence law and characteristics of rock burst and corresponding prevention measures are summarized. The prediction criterion of acoustic emission rockburst in Gaoligongshan tunnel is given. 3 based on the ANSYS software platform, the stress distribution characteristics of surrounding rock are studied by numerical analysis of rock burst in Gaoligongshan Tunnel, and various rock burst criteria based on the relationship between stress and strength are used to analyze the intensity and distribution of rock burst. By comparing with typical rockburst events, Barton criterion and Russenes criterion are found to be more suitable for classification of rock burst intensity in Gaoligongshan tunnel, and the suggested classification of rock burst intensity is given.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
本文编号：2341679
[Abstract]:Under the background of the rapid development of national economy, more and more underground projects are built and buried deeper and deeper. Because the complex geological environment around the underground engineering is quite different from that of the above ground engineering, the dynamic instability of surrounding rock, such as rock burst, is often encountered in engineering construction activities under large buried depth. It poses a serious threat to the safety of underground construction personnel and construction equipment, so accurate rock burst prediction is very important. Based on the rock burst mechanism and rock burst criterion, scholars at home and abroad have put forward a rich theory. However, the complexity of the factors affecting the occurrence of rock burst, each kind of rock burst mechanism and criterion is limited because of its limited investigation factors. This limits the accurate prediction and classification of rockburst. At the same time, the progress and wide application of acoustic emission monitoring technology of rock mass bring more reference to rock burst prediction. Based on the background of the construction of Goligong Mountain Tunnel in Dulong River Highway Reconstruction Project, based on the measured in-situ stress and related engineering data, rock burst acoustic emission monitoring, rock burst event record, numerical analysis, etc., the tendency of rock burst in Gaoligongshan tunnel is analyzed in this paper. The prediction of rock burst, the regularity and characteristics of rock burst, and the criterion of rock burst are studied. The main contents are as follows: 1 based on the measured ground stress, geological data and existing engineering data, the tendency of rock burst in Gaoligongshan Tunnel is studied. 2 based on acoustic emission monitoring results and rock burst records, the typical rock burst events and the characteristics of acoustic emission monitoring data are studied for prediction and classification of rock burst in Gaoligongshan Tunnel, and the occurrence law and characteristics of rock burst and corresponding prevention measures are summarized. The prediction criterion of acoustic emission rockburst in Gaoligongshan tunnel is given. 3 based on the ANSYS software platform, the stress distribution characteristics of surrounding rock are studied by numerical analysis of rock burst in Gaoligongshan Tunnel, and various rock burst criteria based on the relationship between stress and strength are used to analyze the intensity and distribution of rock burst. By comparing with typical rockburst events, Barton criterion and Russenes criterion are found to be more suitable for classification of rock burst intensity in Gaoligongshan tunnel, and the suggested classification of rock burst intensity is given.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U456.3
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