本文關(guān)鍵詞： 深部開采 斷續(xù)節(jié)理 滲流-應(yīng)力-損傷耦合 巷道穩(wěn)定性 數(shù)值模擬　出處：《貴州大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的提高和科學(xué)技術(shù)的發(fā)展,對(duì)淺層礦產(chǎn)資源開發(fā)利用不能滿足人們的需求,使礦山地上開采逐漸轉(zhuǎn)向地下,從淺部開采到深部礦山開采的轉(zhuǎn)變。在深部開采過(guò)程中,遇到的困難程度也逐漸增加。礦井深部開采工程環(huán)境中存在的“三高”(地應(yīng)力、溫度、滲流壓力)和“一擾動(dòng)”(開采擾動(dòng))影響,都給深部開采技術(shù)和保障人員安全帶來(lái)了很大的困難。而巖石是一種非均勻的天然物質(zhì),其內(nèi)部存在十分復(fù)雜的幾何特性,如節(jié)理、裂隙等。而這些弱介質(zhì)構(gòu)造的存在又對(duì)滲流應(yīng)力耦合機(jī)制產(chǎn)生影響,最終影響巷道圍巖的穩(wěn)定。因此,研究處在深部滲流裂隙帶內(nèi)的巷道在多因素影響下的穩(wěn)定性情況是非常必要的。本文利用巖石真實(shí)破裂過(guò)程分析軟件滲流版本RFPA2D-FLOW,對(duì)地質(zhì)構(gòu)造和工程環(huán)境復(fù)雜的深部礦井開采問(wèn)題進(jìn)行工程仿真分析,研究的主要內(nèi)容包含下列幾個(gè)方面:(1)針對(duì)目前深部滲流裂隙帶內(nèi)的巷道穩(wěn)定性研究尚不完備,工程實(shí)例模型尚不貼合,監(jiān)測(cè)數(shù)據(jù)尚不完善的現(xiàn)狀,廣泛了解國(guó)內(nèi)外相關(guān)領(lǐng)域研究現(xiàn)狀,整理并提取有用信息,確定模型參數(shù),構(gòu)建數(shù)值模型。(2)深部開采過(guò)程高地應(yīng)力對(duì)巷道穩(wěn)定性的影響的模擬分析,包括巷道圍巖的破裂模式,應(yīng)力場(chǎng)分布狀態(tài),裂隙萌生發(fā)展過(guò)程,圍巖失穩(wěn)的聲發(fā)射時(shí)空分布等。(3)對(duì)滲流、應(yīng)力聯(lián)合加載情況下含節(jié)理巖體的破壞過(guò)程進(jìn)行數(shù)值模擬分析,研究了巖體中斷續(xù)節(jié)理的演化過(guò)程,從數(shù)值方面分析了裂紋損傷擴(kuò)展機(jī)理,對(duì)更全面地認(rèn)識(shí)了解滲流-應(yīng)力-損傷機(jī)制有著重大的幫助。(4)對(duì)含有斷續(xù)節(jié)理軟弱結(jié)構(gòu)面的深埋巷道模型進(jìn)行數(shù)值模擬分析,分析其在滲流-應(yīng)力-損傷耦合作用下的安全穩(wěn)定性,研究結(jié)果對(duì)復(fù)雜環(huán)境下深埋巷道的安全穩(wěn)定性評(píng)價(jià)具有十分重要的意義。(5)分析探討了深埋巷道滲流裂隙帶的常用安全防護(hù)措施。本文通過(guò)對(duì)各個(gè)模型的模擬分析研究,取得了一些具有建設(shè)性的結(jié)論及成果,對(duì)斷續(xù)節(jié)理巖體中深埋巷道穩(wěn)定性影響及滲流-應(yīng)力-損傷耦合作用機(jī)制的研究具有一定的理論及應(yīng)用價(jià)值,對(duì)深埋巷道滲流裂隙帶的安全防護(hù)方法提供參考幫助。
[Abstract]:With the improvement of national economy and the development of science and technology, the exploitation and utilization of shallow mineral resources can not meet the needs of people. The transformation from shallow mining to deep mining. In the process of deep mining, the difficulty degree also increases gradually. The "three high" (ground stress, temperature) existing in deep mining engineering environment, The influence of percolation pressure) and "disturbance" (mining disturbance) has brought great difficulties to deep mining technology and ensuring the safety of personnel. Rock is a kind of non-uniform natural material, and its interior has very complex geometric characteristics, such as joints. The existence of these weak media structures has an impact on the seepage stress coupling mechanism, and ultimately affects the stability of the surrounding rock of the roadway. It is necessary to study the stability of roadway in deep seepage fracture zone under the influence of many factors. In this paper, RFPA2D-FLOW is used to analyze the true fracture process of rock, which is very complex to geological structure and engineering environment. The engineering simulation analysis of the mining problem in the Ministry of Coal Mine is carried out. The main contents of the study include the following aspects: (1) aiming at the present situation that the stability study of roadway in deep seepage fracture zone is not complete, the engineering example model is not suitable, and the monitoring data are not perfect, The present situation of research in related fields at home and abroad is widely understood, useful information is sorted out and useful information is extracted, model parameters are determined, numerical model. 2) the simulation analysis of the influence of high ground stress on roadway stability during deep mining process, including the failure mode of surrounding rock of roadway, is presented. Stress field distribution state, crack initiation and development process, acoustic emission space-time distribution of surrounding rock instability, etc.) numerical simulation analysis of the failure process of jointed rock mass under the condition of seepage and stress combined loading is carried out. The evolution process of discontinuous joints in rock mass is studied, and the mechanism of crack damage propagation is analyzed numerically. It is of great help to understand more fully the mechanism of seepage stress damage. (4) numerical simulation analysis of deep buried roadway model with discontinuous joint weak structural plane is carried out. Its safety and stability under the coupling of seepage, stress and damage are analyzed. The results are of great significance to evaluate the safety and stability of deep buried roadway under complex environment. (5) the common safety protection measures of deep buried roadway seepage fracture zone are analyzed and discussed. The simulation analysis of each model is carried out in this paper. Some constructive conclusions and achievements have been obtained, which have certain theoretical and practical value for the study of the influence of the stability of deep buried roadway and the mechanism of seepage stress damage coupling in intermittent jointed rock mass. It provides a reference for the safety protection method of seepage fracture zone in deep buried roadway.
【學(xué)位授予單位】：貴州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD322.4

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本文編號(hào)：1520854