發(fā)布時(shí)間：2018-03-09 04:32

  本文選題：巷道　切入點(diǎn)：錨桿參數(shù)　出處：《安徽建筑大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：在煤巷地下工程中,巷道巷幫容易發(fā)生冒頂、底鼓,頂板的塌落也極其的常見。隨著礦井開采深度逐漸增加,巷道和采場的地應(yīng)力水平也越來越高,巷道圍巖的變形程度嚴(yán)重,破壞規(guī)律復(fù)雜。錨桿支護(hù)技術(shù)作為礦井巷道及其他地下工程支護(hù)的主要的支護(hù)形式,在保證巷道穩(wěn)定方面起著重要的作用。本文的巖樣取自恒f煤礦一采區(qū)巖石運(yùn)輸大巷,在現(xiàn)場進(jìn)行數(shù)據(jù)的收集和整理,在實(shí)驗(yàn)室中對巖樣進(jìn)行了實(shí)驗(yàn)分析,得到了巖樣的在單軸壓縮和三軸壓縮兩種情況下的應(yīng)力-應(yīng)變曲線。同時(shí)利用FLAC3D軟件,建立巷道模型,研究錨桿的長度和間距改變時(shí),巷道的應(yīng)力、位移和塑性區(qū)的變化規(guī)律,分析錨桿對巷道圍巖的加固效果,得到不同長度的錨桿間距改變時(shí)對于提高巷道的應(yīng)力、限制洞室的變形、提高圍巖靜載能力的影響。論文的主要研究結(jié)論如下:(1)結(jié)合現(xiàn)有的巖石力學(xué)、彈性力學(xué)等比較成熟的研究成果,以拱形巷道為模型,分別對其進(jìn)行受力狀態(tài)和破壞模式的分析,通過力學(xué)模型計(jì)算所得拱形巷道圍巖應(yīng)力表達(dá)式,應(yīng)用FLAC3D中的Fish語言編制代碼,嵌入到數(shù)值模擬程序中進(jìn)行計(jì)算分析。(2)介紹了錨桿錨固的特點(diǎn)、錨桿選型的基本原則、錨桿的錨固機(jī)理以及錨桿和圍巖的相互關(guān)系。分析巷道圍巖的錨桿支護(hù)和錨固參數(shù),得到錨固長度不同時(shí)的錨桿-圍巖的作用機(jī)理,和任意的一點(diǎn)壓應(yīng)力的值。在進(jìn)行巷道錨桿支護(hù)的設(shè)計(jì)中,錨桿支護(hù)參數(shù)的確定十分重要,根據(jù)塑性圈理論,推導(dǎo)出了錨固巷道時(shí)錨桿長度的計(jì)算公式,通過分析力學(xué)模型,推導(dǎo)出了錨固巷道時(shí)錨桿的間距的計(jì)算公式。(3)進(jìn)行數(shù)值模擬物理力學(xué)參數(shù)實(shí)驗(yàn),對巖樣的物理力學(xué)性質(zhì)進(jìn)行了測定,主要內(nèi)容包括:單軸和三軸壓縮的應(yīng)力-應(yīng)變曲線、抗壓抗拉強(qiáng)度和變形模量等,根據(jù)測出的石灰?guī)r的做出莫爾圓,同時(shí)測定了煤樣的堅(jiān)固性系數(shù)。對FLAC3D軟件和基本的工作原理進(jìn)行了介紹,建立巷道模型,依據(jù)應(yīng)力云圖,分析了在靜載作用下,錨桿的長度在3m,6m,9m時(shí),間距分別為30cm,60cm,90cm錨固時(shí)的塑性破壞區(qū)、位移及垂直及應(yīng)力云圖的變化情況,得到應(yīng)力和位移的關(guān)系,塑性區(qū)和位移的關(guān)系,進(jìn)而總結(jié)了巷道圍巖應(yīng)力的應(yīng)力變化情況、水平位移變化情況和塑性區(qū)變化情況,得到進(jìn)行巷道支護(hù)時(shí),選用合理的錨桿長度和間距,才能取得良好的支護(hù)效果。(4)制定采區(qū)巖石運(yùn)輸大巷礦壓觀測方案,進(jìn)行現(xiàn)場實(shí)測,觀測大巷頂?shù)装搴蛢蓭偷囊平俣?大巷頂?shù)装搴蛢蓭偷囊平俊ｒ?yàn)證選用錨桿長度為3m,錨距為30cm的錨固參數(shù)對此煤礦大巷進(jìn)行錨固,但該礦從節(jié)約支護(hù)成本角度出發(fā),現(xiàn)采用60cm錨桿間距加固一采區(qū)運(yùn)輸大巷。
[Abstract]:In underground engineering of coal roadway, roadway side is prone to roof fall, floor bulge and roof collapse are also very common. With the increase of mining depth, the ground stress level of roadway and stope is higher and higher, and the deformation degree of surrounding rock of roadway is serious. The failure law is complex. As the main supporting form of mine roadway and other underground engineering support, bolt support technology plays an important role in ensuring the stability of roadway. The rock sample in this paper is taken from the rock transportation roadway in the first mining area of Hengfan Coal Mine. The data are collected and sorted in the field, the rock samples are analyzed experimentally in the laboratory, the stress-strain curves of rock samples under uniaxial compression and triaxial compression are obtained. At the same time, the roadway model is established by using FLAC3D software. The stress, displacement and plastic zone of the roadway are studied when the length and spacing of the bolt are changed, and the reinforcement effect of the bolt on the surrounding rock of the roadway is analyzed, and the stress of the roadway is improved when the distance between the anchors varies with different lengths. The main conclusions of this paper are as follows: (1) combined with the existing mature research achievements in rock mechanics and elastic mechanics, the arch roadway is used as a model. The stress state and failure mode of the arch roadway are analyzed, and the stress expression of the arched roadway surrounding rock is calculated by the mechanical model. The code is compiled by Fish language in FLAC3D. This paper introduces the characteristics of anchor bolt, the basic principle of anchor rod selection, the anchoring mechanism and the relationship between anchor rod and surrounding rock, and analyzes the bolting support and anchor parameters of roadway surrounding rock. The action mechanism of bolt-surrounding rock with different anchoring length and the value of arbitrary point compressive stress are obtained. In the design of roadway bolt support, the determination of bolting parameters is very important, according to the theory of plastic circle, The formula for calculating the length of bolt in anchoring roadway is derived. By analyzing the mechanical model, the formula for calculating the spacing of anchor rod in anchoring roadway is derived, and the physical and mechanical parameter experiment of numerical simulation is carried out. The physical and mechanical properties of rock samples are measured. The main contents include the stress-strain curves of uniaxial and triaxial compression, compressive tensile strength and deformation modulus, etc. At the same time, the rugged coefficient of coal sample is measured. The FLAC3D software and basic working principle are introduced, and the roadway model is established. According to the stress cloud diagram, the length of anchor rod is analyzed when the length of bolt is 3 m ~ 6 m ~ (9 m) under static load. The relationship between stress and displacement, the relationship between plastic zone and displacement, and the stress change of surrounding rock of roadway are obtained when the distance is 30 cm ~ 60 cm ~ (10) cm ~ (90 cm), and the change of displacement and vertical and stress cloud diagram are obtained. The change of horizontal displacement and plastic zone can be obtained by selecting reasonable length and spacing of bolt in support of roadway in order to obtain good supporting effect. (4) to formulate the observation scheme of rock transport roadway in mining area, and to carry out the field measurement, the results are as follows: (1) when supporting roadway is carried out, the reasonable length and spacing of anchor rod can be obtained. The approaching velocity of roof and bottom slab and two sides of roadway is observed. It is verified that the anchor rod length is 3 m and the anchoring parameter of 30 cm distance is used to anchor this coal mine roadway, but the mine starts from the angle of saving support cost. At present, 60 cm bolt spacing is used to reinforce the transportation roadway in a mining area.
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TD353.6

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李少軍;丁玉平;李小偉;;新型可回收錨桿在平煤股份二礦井下的實(shí)踐與應(yīng)用[J];煤礦現(xiàn)代化;2011年01期

2 郭鋼;劉鐘;李永康;楊松;張義;;擴(kuò)體錨桿拉拔破壞機(jī)制模型試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2013年08期

3 劉劍平;張慧樂;王述紅;張慧東;趙琰飛;;擴(kuò)體錨桿承載特性的模型試驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2013年04期

4 楊惠蘭;;縫管錨桿及安裝機(jī)具技術(shù)推廣應(yīng)用會[J];金屬礦山;1984年07期

5 王圣公,李家鰲,楊文義,李澤農(nóng),裴廣文,孫金榮,王和,張曉東,劉存;自動錨固錨桿[J];煤炭科學(xué)技術(shù);1998年11期

6 王金華，張津平，劉崇佑，，徐振亞，石學(xué)讓，徐方軍，鄭珍修，付凡利;偏楔式可回收錨桿試驗(yàn)研究[J];煤炭科學(xué)技術(shù);1995年07期

7 陳仲宣;前蘇聯(lián)化學(xué)注漿加固錨桿和不穩(wěn)固巖體技術(shù)的發(fā)展(二)[J];工業(yè)安全與防塵;1994年04期

8 謝焰;反射法檢測錨桿錨固質(zhì)量的應(yīng)用特點(diǎn)分析[J];工程勘察;2000年01期

9 韓興國;可回收錨桿的開發(fā)及使用[J];同煤科技;2003年04期

10 趙慶枝;劉旭明;王海斌;趙紅松;鮑偉;宋立新;陳閃;;淺談回收錨桿技術(shù)的經(jīng)濟(jì)效益及推廣應(yīng)用[J];經(jīng)濟(jì)師;2014年08期

相關(guān)會議論文 前2條

1 馬海春;崔可銳;儲誠富;;錨桿抗爆性能理論分析[A];第23屆全國結(jié)構(gòu)工程學(xué)術(shù)會議論文集（第Ⅲ冊）[C];2014年

2 賀國元;張澤淵;史芳;;門架雙樁—錨桿技術(shù)在基坑支護(hù)中的應(yīng)用[A];全國巖土與工程學(xué)術(shù)大會論文集（下冊）[C];2003年

相關(guān)碩士學(xué)位論文 前5條

1 劉形形;煤礦運(yùn)輸大巷不同錨固參數(shù)的錨桿加固效果的研究[D];安徽建筑大學(xué);2016年

2 段昊;擴(kuò)體錨桿在工程抗浮中的應(yīng)用研究[D];山東大學(xué);2015年

3 王振東;基于ARM的錨桿無損檢測儀設(shè)計(jì)[D];石家莊鐵道大學(xué);2015年

4 晏志春;盤式錨桿方案設(shè)計(jì)與圍巖關(guān)系及工程預(yù)算的研究[D];北方工業(yè)大學(xué);2012年

5 康志強(qiáng);全煤巷道錨桿支護(hù)參數(shù)數(shù)值模擬分析[D];河北理工學(xué)院;2003年

本文編號：1587023