本文選題：大斷面硐室 + 尺寸效應(yīng)��； 參考：《北方工業(yè)大學(xué)》2015年碩士論文

【摘要】：復(fù)雜地質(zhì)條件下大斷面硐室圍巖變形機(jī)理及控制技術(shù)是當(dāng)今地下工程中一項(xiàng)困難的研究課題。硐室斷面尺寸大、圍巖條件差、構(gòu)造應(yīng)力顯著及采動(dòng)應(yīng)力場分布復(fù)雜等因素的影響,使得大斷面巷硐與傳統(tǒng)的中小斷面巷硐相比,存在著更為特殊復(fù)雜的圍巖變形破壞規(guī)律,在硐室掘進(jìn)過程中常產(chǎn)生一系列嚴(yán)重的圍巖變形失穩(wěn)問題,常規(guī)的支護(hù)方法已無法滿足其使用要求。 文章以山西潞安王莊煤礦+540水平井下大斷面支架換裝硐室為研究背景,分別從大斷面硐室圍巖變形破壞機(jī)理,穩(wěn)定性控制原理以及支護(hù)技術(shù)方案等方面入手,采用現(xiàn)場資料收集、理論分析、數(shù)值模擬以及現(xiàn)場監(jiān)測的方法,對(duì)復(fù)雜地質(zhì)條件下大斷面硐室圍巖變形機(jī)理及控制技術(shù)進(jìn)行了較為深入的研究,主要成果如下： (1)提出大斷面硐室圍巖塑性變形計(jì)算公式,對(duì)大斷面硐室圍巖塑性變形的尺寸效應(yīng)進(jìn)行研究分析。建立FLAC3D數(shù)值模型,分析硐室斷面面積、圍巖性質(zhì)、構(gòu)造應(yīng)力、鄰近硐室布置距離等因素對(duì)大斷面硐室圍巖變形,應(yīng)力和塑性區(qū)分布特征的影響規(guī)律,揭示大斷面硐室圍巖變形機(jī)理。 (2)結(jié)合大斷面硐室圍巖的變形特征,對(duì)大斷面硐室開挖圍巖變形控制進(jìn)行研究。首先,對(duì)大斷面巷硐掘進(jìn)常用的三種方法(雙側(cè)壁導(dǎo)坑法、中隔壁法、正臺(tái)階法)進(jìn)行數(shù)值模擬分析,對(duì)比三種不同開挖方法下大斷面硐室圍巖應(yīng)力及變形破壞特征,得出采用正臺(tái)階法開挖能更好的控制硐室圍巖穩(wěn)定性的結(jié)論。然后,通過多種圍巖控制方案對(duì)比分析,提出“加長錨桿、錨索+注漿錨索+底板長錨索”聯(lián)合支護(hù)技術(shù)。該方案可使硐室圍巖形成多層次承載圈,在提高圍巖力學(xué)特性的同時(shí)充分發(fā)揮圍巖的自承載能力,很好的保證了硐室圍巖的穩(wěn)定性。 (3)將所提出的圍巖控制方案應(yīng)用到王莊煤礦大斷面支架換裝硐室開拓延伸實(shí)際工程中。對(duì)圍巖變形監(jiān)測結(jié)果進(jìn)行分析可知,采用此方案后,硐室圍巖穩(wěn)定性得到了很大的改善。
[Abstract]:The deformation mechanism and control technology of surrounding rock in large section cavern under complex geological conditions is a difficult research subject in underground engineering nowadays. Due to the influence of large section size, poor surrounding rock condition, obvious tectonic stress and complex distribution of mining stress field, the large section tunnel has more complex deformation and failure law than the traditional medium and small section tunnel. A series of serious surrounding rock deformation and instability problems often occur in the process of chamber tunneling, and the conventional supporting methods can no longer meet the requirements of their application. This paper takes the large section support changing chamber under 540 horizontal well of Shanxi Lu'an Wangzhuang Coal Mine as the research background. Starting with the mechanism of deformation and failure of surrounding rock in large section chamber, the principle of stability control and the technical scheme of support, the methods of field data collection, theoretical analysis, numerical simulation and field monitoring are adopted. In this paper, the deformation mechanism and control technology of surrounding rock in large section chamber under complex geological conditions are studied. The main results are as follows: 1) the formula for calculating plastic deformation of surrounding rock in large section chamber is put forward. The size effect of plastic deformation of surrounding rock in large section chamber is studied and analyzed. A numerical model of FLAC3D is established to analyze the influence of factors such as section area of chamber, nature of surrounding rock, tectonic stress and arrangement distance of adjacent chamber on the distribution characteristics of surrounding rock deformation, stress and plastic zone of large section chamber. The deformation mechanism of surrounding rock in large section chamber is revealed. The deformation control of surrounding rock in excavation of large section chamber is studied in combination with the deformation characteristics of surrounding rock in large section chamber. First of all, the numerical simulation and analysis of three common methods (double sidewall tunnel method, middle wall method, positive step method) for large section tunnel excavation are carried out, and the stress and deformation failure characteristics of surrounding rock of large section chamber under three different excavation methods are compared. It is concluded that the stability of surrounding rock of chamber can be better controlled by using step method. Then, through the comparative analysis of various surrounding rock control schemes, the combined support technology of "lengthening anchor rod and grouting anchor cable bottom slab long anchor cable" is put forward. This scheme can make the surrounding rock of the chamber form a multi-layer bearing ring, and give full play to the self-bearing capacity of the surrounding rock while improving the mechanical characteristics of the surrounding rock. The stability of the surrounding rock of the chamber is well guaranteed. The proposed control scheme of surrounding rock is applied to the practical project of the large section support changing chamber in Wangzhuang coal mine. By analyzing the monitoring results of surrounding rock deformation, we can see that the stability of surrounding rock is greatly improved by using this scheme.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 姚愛敏;孫世國;劉玉福;;錨桿支護(hù)現(xiàn)狀及其發(fā)展趨勢[J];北方工業(yè)大學(xué)學(xué)報(bào);2007年03期

2 李常文,周景林,韓洪德;組合拱支護(hù)理論在軟巖巷道錨噴設(shè)計(jì)中應(yīng)用[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào);2004年05期

3 鄭浩;銀廣文;;基于卸荷減跨理論下隧道開挖技術(shù)的研究[J];湖南交通科技;2012年03期

4 朱漢華;楊建輝;尚岳全;;隧道新奧法原理與發(fā)展[J];隧道建設(shè);2008年01期

5 殷麗君;馬洪素;;松動(dòng)圈支護(hù)理論分析綜述與展望[J];山西建筑;2008年02期

6 繆協(xié)興;自然平衡拱與巷道圍巖的穩(wěn)定[J];礦山壓力與頂板管理;1990年02期

7 潘睿;錨桿組合拱理論在煤巷中的應(yīng)用[J];礦山壓力與頂板管理;2002年02期

8 李國富;高應(yīng)力軟巖巷道變形破壞機(jī)理與控制技術(shù)研究[J];礦山壓力與頂板管理;2003年02期

9 王衛(wèi)軍;Study on mechanical principle of reinforcing sidewalls and corners of roadway to control floor heave by anchors[J];Journal of Coal Science & Engineering(China);2003年01期

10 齊利偉;李寶富;梁向輝;常壘;王富林;;上覆巨厚礫巖層失穩(wěn)誘發(fā)重力型沖擊地壓研究[J];煤;2012年06期

，

本文編號(hào)：2007454