本文選題：深井 + 大斷面硐室��； 參考：《山東科技大學》2017年碩士論文

【摘要】：隨著煤炭資源近幾十年的開采,礦山的采掘活動正逐步的向深部發(fā)展轉移。深井條件下的大斷面硐室,具有高地應力埋藏深,斷面積大的特點,深部大斷面硐室的開挖與支護過程是一個應力重新分布的過程。進行該類硐室的支護設計要兼顧影響圍巖穩(wěn)定的各方面影響因素。本文是在結合于趙樓礦實際的地質資料和工程概況,對影響深井高應力條件下的大斷面硐室圍巖穩(wěn)定性的自然因素和人為因素進行分析;對大斷面硐室常見的支護方式進行了梳理總結�？偨Y出圍巖的圍巖場和圍巖應力場的變化規(guī)律從而確定出了錨注支護的最佳支護方案。最后對趙樓礦的中央泵房硐室分開挖和幾種支護方案進行數(shù)值模擬。對于深井高應力大斷面硐室圍巖穩(wěn)定性分析及支護機理研究采取的技術路線是通過查閱資料收集文獻后,利用實驗室試驗實現(xiàn)工程的現(xiàn)場應用和監(jiān)測,利用理論計算分析和數(shù)值模擬分析得出硐室圍巖變形破壞規(guī)律、圍巖加固方法。繼而通過模擬驗證加固方法的可行性。(1)對于深井大斷面硐室圍巖穩(wěn)定的影響因素進行分析,將影響穩(wěn)定性的因素歸類為自然因素和人為因素。自然因素主要包括圍巖巖性、地質構造和地應力、地溫和水化損傷等;人為因素包括開挖和掘進施工、回采影響、施工質量、支護設計的不合理等。(2)利用地應力實測、實驗室礦物組分分析等得出硐室圍巖的礦區(qū)組分、巖石的基本力學參數(shù)、深井大斷面硐室一定區(qū)域內的應力狀況,利用諸多的試驗手段為硐室支護方案的設計提供參數(shù)依據(jù)。(3)利用數(shù)值模擬軟件FLAC3D對于中央泵房硐室在錨網(wǎng)噴、錨網(wǎng)索噴、錨注不同支護條件下的圍巖位移變形、塑性區(qū)、錨桿受力等進行模擬分析對比得出:錨注支護可以作為深井高應力條件下大斷面硐室的可靠支護方式。(4)針對于趙樓煤礦深部高應力條件下大斷面硐室破壞的特點和實際工程地質狀況提出二次支護方案,對中央泵房硐室、副井馬頭門、清理撒煤硐室提出具體的支護設計方案。(5)針對于該課題后續(xù)研究提出部分展望。因目前缺乏大量實驗數(shù)據(jù)和工程實踐的規(guī)律性總結,要提高對該條件圍巖性質的認識,需做進一步探討;高應力條件下圍巖的工程特性發(fā)生的微觀機理分析不夠,裂隙發(fā)展規(guī)律、遇水巖性變化的微觀演化過程尚需進一步分析;針對工程實際情況和現(xiàn)場條件調整使用不同注漿材料或者研究使用具有微膨脹性的注漿材料。
[Abstract]:With the mining of coal resources in recent decades, mining activities are gradually moving to the deep. The large section chamber under the condition of deep well has the characteristics of deep buried high ground stress and large fault area. The excavation and support process of deep large section chamber is a process of stress redistribution. The supporting design of this kind of chamber should take into account the factors affecting the stability of surrounding rock. Combined with the actual geological data and engineering survey of Zhaolou Mine, this paper analyzes the natural and human factors that affect the stability of surrounding rock of large section chamber under the condition of deep well and high stress. The common supporting methods of large section chamber are summarized. The law of variation of surrounding rock field and surrounding rock stress field is summarized and the best supporting scheme of bolt-grouting support is determined. Finally, the excavation and several supporting schemes of the central pump chamber in Zhaolou Mine are simulated numerically. For the analysis of surrounding rock stability and supporting mechanism of deep well with high stress and large section chamber, the technical route is to realize the field application and monitoring of engineering by using laboratory test after consulting data and collecting documents. The deformation and failure law of surrounding rock and the reinforcement method of surrounding rock are obtained by theoretical calculation and numerical simulation. Then, the influence factors of surrounding rock stability of large section chamber in deep wells are analyzed by simulation. The factors that affect stability are classified as natural factors and human factors. Natural factors mainly include surrounding rock lithology, geological structure and in-situ stress, ground temperature and hydration damage, etc. Human factors include excavation and excavation construction, mining effect, construction quality, unreasonable design of support, etc. The composition of the surrounding rock, the basic mechanical parameters of the rock and the stress in a certain area of a large section chamber in a deep well are obtained by the analysis of the mineral composition in the laboratory. Using many test methods to provide parameter basis for the design of supporting scheme of chamber.) using numerical simulation software FLAC3D, the displacement deformation and plastic zone of surrounding rock in the central pump room under the conditions of bolting mesh spraying, bolting cable spraying and bolting grouting under different supporting conditions are studied, and the numerical simulation software FLAC3D is applied to the surrounding rock displacement deformation and plastic zone of the central pump room under different supporting conditions. Through the simulation analysis and comparison of bolt force and so on, it is concluded that bolting and grouting support can be used as a reliable support method for large section chamber under high stress conditions in deep wells. (4) aiming at the characteristics of large section chamber failure in Zhaolou coal mine under the condition of high stress in depth. And the actual engineering geological conditions. For the central pump room chamber, auxiliary well horse head door, cleaning coal chamber concrete support design scheme. 5) in view of the subject of follow-up research put forward some prospects. Due to the lack of a large amount of experimental data and a regular summary of engineering practice at present, further discussion is needed to improve the understanding of the surrounding rock properties of the condition, and the microscopic mechanism analysis of the engineering characteristics of the surrounding rock under high stress conditions is not enough. The law of fracture development and the microcosmic evolution process of water lithologic change need to be further analyzed, and different grouting materials are used according to the actual engineering conditions and field conditions, or the grouting materials with micro-expansion are used in the research.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD354

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