本文選題：色連二礦　切入點：軟巖　出處：《安徽理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著煤炭開采不斷向深部發(fā)展,軟巖的工程地質問題一直困擾著我國西部煤礦的安全生產(chǎn),特別是西部中生代盆地的膠結差、低膨脹性、遇水泥化這類軟巖,礦山巷道在掘進過程中的穩(wěn)定性評價尚缺乏可靠依據(jù)。因此,對研究區(qū)軟巖巷道圍巖穩(wěn)定性進行分析及評價,從而為深部支護設計與資源的合理開采提供科學參考具有重要的實踐意義。 本文在分析色連二礦水文工程地質條件、巖石物理力學特性及圍巖性質和微觀組分的基礎上,結合井筒以及巷道工程地質的實際調查,明晰了巷道變形失穩(wěn)特征及影響軟巖巷道圍巖穩(wěn)定性的主控因素：即由于礦區(qū)軟巖成巖時代晚、巖石成熟度低、軟巖中含有大量的粘土礦物等親水性物質,以致巖石在遇水條件下軟化甚至泥化,使得圍巖的強度急劇弱化,從而導致圍巖的變形失穩(wěn)破壞。并分別運用集對理論、BP神經(jīng)網(wǎng)絡和灰色關聯(lián)度等方法對礦區(qū)3條典型的軟巖巷道進行了圍巖穩(wěn)定性評價,結果表明：礦區(qū)軟巖巷道在遇水軟化前,屬于基本穩(wěn)定型。 在此基礎上,運用FLAC3D軟件,模擬對比分析了滲流與無滲流、軟化與未軟化、支護與未支護等方案下軟巖巷道開挖后圍巖應力、塑性區(qū)、位移等變化特征,各數(shù)值模擬方案對比分析表明：軟巖巷道在滲流條件下和遇水軟化后都不同程度的加劇了圍巖的塑性破壞,但水對圍巖穩(wěn)定性的主要影響因素是對軟巖的力學弱化作用,且支護有效的控制了軟化滲流導致的圍巖破壞。研究結果對指導含水層下軟巖巷道的掘進和支護設計提供了一定的科學依據(jù),有一定的借鑒意義。
[Abstract]:With the continuous development of coal mining to the deep, the engineering geological problems of soft rock have been perplexing the safe production of coal mines in western China, especially the poor cementation, low expansion and cement of the Mesozoic basins in the western China. The stability evaluation of mine roadway in the process of excavation is still lack of reliable basis. Therefore, the stability of surrounding rock of soft rock roadway in the study area is analyzed and evaluated. Therefore, it is of great practical significance to provide scientific reference for deep support design and rational exploitation of resources. Based on the analysis of hydrological engineering geological conditions, physical and mechanical characteristics of rock and surrounding rock properties and microscopic composition of Xilian No.2 Mine, this paper combines with the actual investigation of the engineering geology of shaft and roadway. The characteristics of roadway deformation and instability and the main controlling factors affecting the stability of soft rock roadway surrounding rock are clarified: that is, due to the late diagenetic age of soft rock in mining area, the low maturity of rock, the soft rock contains a large amount of hydrophilic substances such as clay minerals. As a result, the rock softens or even muddies under the condition of water, which weakens the strength of the surrounding rock. The method of set pair theory BP neural network and grey correlation degree are used to evaluate the stability of surrounding rock in three typical soft rock roadways in mining area. The results show that the soft rock roadway in mining area belongs to the basic stable type before softening in water. On this basis, by using FLAC3D software, the variation characteristics of surrounding rock stress, plastic zone and displacement of soft rock roadway after excavation are simulated and analyzed, such as seepage and no seepage, softening and unsoftening, supporting and unsupporting, etc. The comparative analysis of various numerical simulation schemes shows that the plastic failure of surrounding rock is aggravated to varying degrees in soft rock roadway under seepage condition and after water softening, but the main influence factor of water on the stability of surrounding rock is the mechanical weakening of soft rock. And the support can effectively control the surrounding rock damage caused by soft seepage. The research results provide a certain scientific basis for guiding the excavation and support design of soft rock roadway under the aquifer, which has certain reference significance.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

【參考文獻】

相關期刊論文 前10條

1 彭柏興;王星華;;湘瀏盆地紅層軟巖工程性質指標相關性研究[J];工程勘察;2006年S1期

2 胡博聆;王繼華;趙春宏;;滇中泥質粉砂巖崩解特性試驗研究[J];工程勘察;2010年07期

3 張泓;晉香蘭;李貴紅;楊志遠;張慧;賈建稱;;鄂爾多斯盆地侏羅紀—白堊紀原始面貌與古地理演化[J];古地理學報;2008年01期

4 徐紅梅,侯龍清,羅嗣海;紅層工程性質指標相關性研究[J];東華理工學院學報;2005年01期

5 黃文輝;唐書恒;唐修義;陳萍;趙志根;萬歡;敖衛(wèi)華;肖秀玲;柳佳期;B.Finkelman;;西北地區(qū)侏羅紀煤的煤巖學特征[J];煤田地質與勘探;2010年04期

6 丁允杰;;水致泥化軟巖巷道圍巖變形規(guī)律及控制技術[J];煤礦安全;2008年03期

7 張志康;單仁亮;;深井大斷面軟巖巷道變形破裂規(guī)律數(shù)值模擬[J];煤礦安全;2012年01期

8 馮松寶;吳基文;李賢慶;張大偉;王康東;;任樓礦5_1-7_2煤層段巖體穩(wěn)定性定量評價[J];煤炭工程;2010年03期

9 鄧福康;汪仁和;;巷道圍巖分類與錨噴支護設計[J];山東煤炭科技;2009年01期

10 董方庭，宋宏偉，郭志宏，鹿守敏，梁士杰;巷道圍巖松動圈支護理論[J];煤炭學報;1994年01期

相關博士學位論文 前5條

1 李剛;水巖耦合作用下軟巖巷道變形機理及其控制研究[D];遼寧工程技術大學;2009年

2 馬春德;深部復合型破壞高應力軟巖巷道支護技術研究[D];中南大學;2010年

3 彭柏興;紅層軟巖工程特性及其大直徑嵌巖樁若干問題研究[D];中南大學;2009年

4 張召千;大斷面煤巷圍巖穩(wěn)定性控制及動態(tài)評價體系研究[D];太原理工大學;2010年

5 袁越;沙吉海礦區(qū)中生代砂礫層特性及其支護對策[D];中國礦業(yè)大學（北京）;2013年

，

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