本文關(guān)鍵詞：深部高應(yīng)力工程軟巖巷道連續(xù)“雙殼”圍巖控制機理研究　出處：《河北工程大學》2016年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 深部巷道 工程軟巖 連續(xù)“雙殼” 圍巖控制 殼體厚度

【摘要】：我國淺部煤炭資源逐漸枯竭,煤炭資源進入深部開采已成為客觀必然規(guī)律,深部煤炭開采已成為國內(nèi)外采礦界研究的焦點問題之一。隨著開采深度和強度的不斷增加,深部巷道圍巖表現(xiàn)出與淺部圍巖截然不同的力學響應(yīng)機制。圍巖在“三高一擾動”復雜力學環(huán)境下,巖體變形特性發(fā)生了根本性變化,巷道圍巖表現(xiàn)出工程軟巖特性,具有明顯蠕變和流變特點,圍巖擴容現(xiàn)象嚴重。同時,在高應(yīng)力作用下深部巷道發(fā)生動力學災(zāi)害可能性急劇增加,給深部礦井安全、高效開采帶來較大威脅。解決深部煤炭資源開采的首要及關(guān)鍵問題在于解決深部巷道支護,大量工程實踐和理論研究均已表明,傳統(tǒng)淺部巷道支護理論和技術(shù)已經(jīng)不能適應(yīng)深部巷道支護的要求。本文基于連續(xù)“雙殼”支護理論,分析了深部高應(yīng)力工程軟巖巷道變形破壞規(guī)律,構(gòu)建了連續(xù)“雙殼”支護物理模型,具體結(jié)論如下:(1)雖然部分深部巷道圍巖自身強度較高,但在高應(yīng)力的作用下表現(xiàn)出軟巖的性質(zhì),淺部巷道傳統(tǒng)的支護理論與支護方式已經(jīng)不能滿足深部高應(yīng)力工程軟巖巷道的支護需求,亟需針對深部高應(yīng)力工程軟巖巷道支護問題的研究工作,實現(xiàn)深部高應(yīng)力工程軟巖巷道的支護。(2)分析了影響深部高應(yīng)力工程軟巖的因素,認為復雜應(yīng)力場、圍巖性質(zhì)、地下水作用、支護設(shè)計為影響深部高應(yīng)力工程軟巖巷道的主要因素。(3)通過對深部高應(yīng)力巷道在未支護情況下數(shù)值模擬分析發(fā)現(xiàn),不論巷道處于高水平應(yīng)力作用還是高垂直應(yīng)力作用,巷道圍巖均表現(xiàn)出大變形、強流變、自穩(wěn)所需時間較長等特征。另外,在高水平應(yīng)力作用下,巷道兩幫的移近量明顯小于頂?shù)装迨諗苛?尤其是巷道底鼓量明顯大約巷道頂板、兩幫的變形量,表明在進行深部高應(yīng)力工程軟巖巷道支護時,應(yīng)增強對巷道底板支護,更好的保證深部巷道的穩(wěn)定性。(4)理論分析了錨桿(錨索)軸向、橫向支護作用,巷道圍巖注漿加固機理。根據(jù)巷道圍巖不同的力學狀態(tài),分別采用了C-M屈服準則、D-P屈服準則,得出了連續(xù)“雙殼”支護下,巷道圍巖破裂區(qū)、塑性區(qū)、彈性區(qū)應(yīng)力變化規(guī)律,破裂區(qū)、塑性區(qū)半徑,破裂區(qū)、塑性區(qū)圍巖位移,構(gòu)建了連續(xù)“雙殼”支護模型。(5)設(shè)計了連續(xù)“雙殼”支護相似材料實驗,通過對比巷道底板采用連續(xù)“雙殼”支護和普通支護方式,得出了連續(xù)“雙殼”支護能夠較好的控制巷道圍巖穩(wěn)定,其不僅能降低巷道底鼓量,還能夠與巷道頂板和兩幫支護體起到協(xié)同支護作用,降低巷道頂板和兩幫的位移量。(6)設(shè)計了不同埋深下連續(xù)“雙殼”支護不同殼體參數(shù)相似材料實驗和數(shù)值模擬實驗,得出了在不同深淺殼體總厚度相同淺部殼體厚度、不同淺部殼體厚度相同深淺殼體總厚度下巷道圍巖變形規(guī)律,得出在采用連續(xù)“雙殼”支護時,應(yīng)首先確定出連續(xù)“雙殼”支護總厚度,然后再選擇出合理的淺部殼體厚度,從而更好的提升連續(xù)“雙殼”支護的合理性。
[Abstract]:China's shallow coal resources are drying up. Coal resources have entered an objective rule of deep mining. Deep coal mining has become one of the focuses of mining research both at home and abroad. With the increasing depth and strength of mining, the surrounding rock of the deep tunnel shows a mechanical response mechanism which is completely different from that of the shallow surrounding rock. Under the complex mechanical environment of "three high and one disturbance", the deformation characteristics of the surrounding rock have changed fundamentally. The surrounding rock of the roadway shows the characteristics of engineering soft rock, which has obvious creep and rheological characteristics, and the phenomenon of wall rock dilatation is serious. At the same time, there is a sharp increase in the possibility of dynamic disaster in deep roadway under high stress, which brings great threat to the safety and high efficiency mining in deep mine. The key and key problem to solve the deep coal resources mining is to solve the deep roadway support. A large number of engineering practice and theoretical research have shown that the traditional shallow roadway support theory and technology can no longer meet the requirements of deep roadway support. In this paper, the continuous "double shell" supporting theory based on the analysis of deep high stress soft rock tunnel deformation law, construct the continuous "double shell" supporting the physical model, the main conclusions are as follows: (1) although the higher part of the deep roadway surrounding rock strength, but exhibit the properties of soft rock in high stress, shallow roadway support theory and the traditional supporting mode has been unable to meet the engineering requirements of the soft rock roadway in deep high stress, according to the need of deep high stress soft rock roadway work, realize the deep high stress soft rock roadway support. (2) the factors affecting deep soft rock with high stress are analyzed. It is considered that complex stress field, surrounding rock property, groundwater action and supporting design are main factors that affect deep soft rock roadway with high stress. (3) through the numerical simulation analysis of the deep high stress roadway under unsupported condition, it is found that whether the roadway is at high level stress or high vertical stress, the roadway surrounding rock exhibits the characteristics of large deformation, strong rheology and self stability. In addition, the high level of stress, the two sides of roadway near convergence is obviously less than the top and bottom, especially the floor heave of roadway deformation was about two for the roof, and that in deep high stress soft rock roadway, the roadway floor support should be enhanced stability, better guarantee of deep mine roadway. (4) theoretical analysis of the axial and lateral support of anchorage (Anchorage) and the mechanism of grouting reinforcement for roadway surrounding rock. According to the mechanical state of different roadway, respectively using C-M yield criterion and D-P yield criterion, the continuous "double shell" support under the rule of stress variation in elastic zone, plastic zone and fracture zone of surrounding rocks, broken zone and plastic zone radius, fracture zone and plastic zone, displacement of surrounding rock, construction the model of continuous "double shell" support. (5) the design of the continuous "double shell" supporting similar material experiment, by comparing the roadway floor with the continuous "double shell" support and general support, the continuous "double shell" supporting stability control of roadway surrounding rock is better, which can not only reduce the amount of roadway floor heave of roadway, and can roof and two sides to support collaborative support function, reduce the displacement of the tunnel roof and two for the amount of. (6) the design of the different depth under the continuous "double shell" supporting different shell parameters of simulation materials and numerical experiment, get the rock shell thickness and the same shallow shallow shell of different thickness of the same depth of casing deformation in thickness under different shades of shell thickness, obtained by using a continuous "double shell" support, should first determine the continuous "double shell" supporting the total thickness, and then choose a shallow shell thickness is reasonable, so as to better promote the continuous "double shell" supporting the rationality.
【學位授予單位】：河北工程大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TD353

【參考文獻】

相關(guān)期刊論文 前10條

1 楊本生;高斌;孫利輝;楊萬斌;;深井軟巖巷道連續(xù)“雙殼”治理底鼓機理與技術(shù)[J];采礦與安全工程學報;2014年04期

2 康紅普;;深部煤礦應(yīng)力分布特征及巷道圍巖控制技術(shù)[J];煤炭科學技術(shù);2013年09期

3 孫利輝;楊本生;楊萬斌;孫春東;;深部巷道連續(xù)雙殼加固機理及試驗研究[J];采礦與安全工程學報;2013年05期

4 謝廣祥;常聚才;;深井巷道控制圍巖最小變形時空耦合一體化支護[J];中國礦業(yè)大學學報;2013年02期

5 孟慶彬;韓立軍;喬衛(wèi)國;林登閣;范加冬;;趙樓礦深部軟巖巷道變形破壞機理及控制技術(shù)[J];采礦與安全工程學報;2013年02期

6 勾攀峰;辛亞軍;申艷梅;張和;;深井巷道兩幫錨固體作用機理及穩(wěn)定性分析[J];采礦與安全工程學報;2013年01期

7 黃興;劉泉聲;喬正;;朱集礦深井軟巖巷道大變形機制及其控制研究[J];巖土力學;2012年03期

8 楊本生;耿學良;孫利輝;宋獻忠;張利;;五陽礦厚煤層巷道底鼓機制及控制研究[J];采礦與安全工程學報;2012年01期

9 方新秋;趙俊杰;洪木銀;;深井破碎圍巖巷道變形機理及控制研究[J];采礦與安全工程學報;2012年01期

10 王金華;;全煤巷道錨桿錨索聯(lián)合支護機理與效果分析[J];煤炭學報;2012年01期

相關(guān)博士學位論文 前7條

1 李為騰;深部軟巖巷道承載結(jié)構(gòu)失效機理及定量讓壓約束混凝土拱架支護體系研究[D];山東大學;2014年

2 張益東;錨固復合承載體承載特性研究及在巷道錨桿支護設(shè)計中的應(yīng)用[D];中國礦業(yè)大學;2013年

3 趙宇飛;加錨結(jié)構(gòu)面剪切特性及錨固巖體綜合力學模型研究[D];中國水利水電科學研究院;2013年

4 李沖;軟巖巷道讓壓殼—網(wǎng)殼耦合支護機理與技術(shù)研究[D];中國礦業(yè)大學;2012年

5 許國安;深部巷道圍巖變形損傷機理及破裂演化規(guī)律研究[D];中國礦業(yè)大學;2011年

6 牛雙建;深部巷道圍巖強度衰減規(guī)律研究[D];中國礦業(yè)大學;2011年

7 王猛;煤礦深部開采巷道圍巖變形破壞特征試驗研究及其控制技術(shù)[D];遼寧工程技術(shù)大學;2010年

相關(guān)碩士學位論文 前1條

1 崔洪章;深部巷道圍巖變形破壞特征模擬研究及控制技術(shù)[D];太原理工大學;2013年

，

本文編號：1343375