本文選題：巷道不對稱變形　切入點：區(qū)段煤柱　出處：《西安科技大學》2017年碩士論文　論文類型：學位論文

【摘要】：軟巖巷道的支護問題是煤炭安全高效開采過程中亟待研究的課題之一,然而由于軟巖巖體受水易變形和巖體的蠕變特性,布置于軟巖中的巷道圍巖易受應力和水的影響,導致巷道因布置環(huán)境不同而出現不同形式的變形破壞。研究軟巖巷道變形破壞規(guī)律對于巷道安全支護和工作面的正�；夭芍陵P重要。論文以大南湖一礦為工程背景,采取現場探測和地質特征調查分析、理論分析、數值模擬和現場監(jiān)測相結合的綜合分析方法,研究了大南湖一礦回風巷道變形機理和支護技術,通過對大南湖一礦1303工作面、1304工作面回風巷道現場地質調研、鉆孔窺視儀的監(jiān)測和巷道圍巖采樣物理力學試驗,得出巷道圍巖巖性為軟巖,圍巖易軟化、泥化,易風化分解,同時分析了巷道變形破壞機理;對巷道圍巖采用彈塑性變形理論并建立力學模型,得出工作面?zhèn)认驂毫τ绊懛秶鸀?3.95m,回風巷道塑性變形范圍為2.5m;依據回風巷道賦存環(huán)境、變形破壞機理和巷道圍巖塑性區(qū)范圍,提出相應的巷道支護優(yōu)化方案并借助FLAC3D數值計算軟件,對巷道優(yōu)化支護方案進行比較分析,得出1303回風巷道采用加強支護,減少了巷道變形及地下水的影響,1304回風巷道采用基本支護,實現了巷道穩(wěn)定支護;優(yōu)化后的支護方案經過現場監(jiān)測,巷道圍巖變形得到有效改善,保障了巷道圍巖的穩(wěn)定性,取得了良好的支護效果。本論文研究成果對大南湖一礦安全回采具有重要指導意義,研究成果對于類似軟巖巷道的支護具有一定借鑒意義。
[Abstract]:The supporting problem of soft rock roadway is one of the urgent research topics in the process of safe and efficient mining of coal. However, because soft rock mass is easily deformed by water and creep characteristics of rock mass, the surrounding rock of roadway arranged in soft rock is easily affected by stress and water. It is very important to study the deformation and failure law of soft rock roadway for the safe support of roadway and the normal mining of working face. The deformation mechanism and supporting technology of return wind roadway in Dananhu No. 1 Mine are studied by the methods of field detection and geological characteristics investigation and analysis, theoretical analysis, numerical simulation and field monitoring. Based on the field geological investigation, monitoring of borehole peeking instrument and physical and mechanical test of surrounding rock sampling, it is concluded that the rock property of roadway surrounding rock is soft rock, the surrounding rock is easy to soften, muddy and decompose easily. At the same time, the mechanism of roadway deformation and failure is analyzed, and the elastic-plastic deformation theory and mechanical model are established for surrounding rock of roadway, and the influence range of lateral pressure in working face is 53.95m, and the plastic deformation range of backwind roadway is 2.5m.According to the existing environment of backwind roadway, The mechanism of deformation and failure and the range of plastic zone of surrounding rock of roadway are put forward, and the corresponding optimization scheme of roadway support is put forward and compared with that of FLAC3D numerical calculation software, and it is concluded that 1303 return air roadway adopts reinforced support. The deformation of roadway and the influence of underground water are reduced. The basic support is adopted in the return air roadway of No. 1304, and the stable support of roadway is realized. After the site monitoring, the deformation of surrounding rock of roadway is effectively improved, and the stability of surrounding rock of roadway is guaranteed. The research results of this paper have important guiding significance for safe mining in Dananhu No. 1 Mine, and the research results have certain reference significance for the support similar to soft rock roadway.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD322;TD353

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