發(fā)布時間：2018-11-19 08:21

【摘要】：在國家經(jīng)濟(jì)迅速發(fā)展的大背景之下，地下工程修建數(shù)量越來越多，埋深越來越大。地下工程由于其周圍復(fù)雜的地質(zhì)環(huán)境與地上工程有較大不同，尤其在大埋深下進(jìn)行工程建設(shè)活動，時常會遇到巖爆等圍巖動力失穩(wěn)現(xiàn)象，給地下施工人員生命安全及施工設(shè)備帶來嚴(yán)重的威脅，因此準(zhǔn)確的巖爆預(yù)報工作至關(guān)重要�；趲r爆機(jī)理與巖爆判據(jù)，國內(nèi)外學(xué)者提出了豐富的理論，然而影響巖爆發(fā)生因素的復(fù)雜性，每一種巖爆機(jī)理與判據(jù)由于其考察因素有限，因而具有局限性，這就限制了巖爆準(zhǔn)確預(yù)報與分級。同時巖體聲發(fā)射監(jiān)測技術(shù)的進(jìn)步及廣泛應(yīng)用，這就給巖爆預(yù)報帶來更多的參考依據(jù)。 本文依托獨龍江公路改建工程高黎貢山隧道建設(shè)背景之下，基于實測地應(yīng)力與相關(guān)工程資料、巖爆聲發(fā)射監(jiān)測、巖爆事件記錄、數(shù)值分析等，對高黎貢山隧道巖爆傾向性、巖爆預(yù)報、巖爆發(fā)生規(guī)律與特征、巖爆判據(jù)等方面進(jìn)行研究。主要研究內(nèi)容如下： 1基于實測地應(yīng)力、地質(zhì)資料及已有工程資料，研究了高黎貢山隧道巖爆傾向性。 2基于聲發(fā)射監(jiān)測結(jié)果及巖爆記錄，對高黎貢山隧道巖爆預(yù)測與定級，研究了典型巖爆事件及聲發(fā)射監(jiān)測數(shù)據(jù)特征，總結(jié)巖爆發(fā)生規(guī)律與特征及相應(yīng)防治措施，，給出高黎貢山隧道聲發(fā)射巖爆預(yù)報判據(jù)。 3基于ANSYS軟件平臺，對高黎貢山隧道巖爆數(shù)值分析，研究了圍巖應(yīng)力分布特征，應(yīng)用多種基于應(yīng)力與強(qiáng)度關(guān)系的巖爆判據(jù)，分析巖爆烈度與分布位置，并與典型巖爆事件進(jìn)行對比分析，得出了Barton判據(jù)及Russenes判據(jù)較適用于高黎貢山隧道巖爆烈度分級，并且給出了建議的巖爆烈度分級。
[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.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U456.3

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