本文選題：淺埋煤層 + 順槽變形規(guī)律��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：開展神南礦區(qū)某礦4-2煤24201工作面順槽支護(hù)設(shè)計具有重要的工程意義和價值。采用理論方法對順槽圍巖變形機(jī)理進(jìn)行研究,通過室內(nèi)試驗研究其圍巖物理力學(xué)性質(zhì),結(jié)合數(shù)值模擬和現(xiàn)場監(jiān)測對支護(hù)效果進(jìn)行評價。主要結(jié)論有:(1)分析了淺埋煤層順槽圍巖應(yīng)力分布特征,順槽圍巖變形的主要影響因素包括:埋深、圍巖性質(zhì)、圍巖地應(yīng)力、采動活動、地下水、支護(hù)設(shè)計和施工質(zhì)量。圍巖的變形破壞形式主要有拉裂破壞、剪切破壞及復(fù)合破壞等三種。(2)完成了 4-2煤煤樣室內(nèi)物理力學(xué)試驗,得到了自然與飽水狀態(tài)下的單軸抗壓強(qiáng)度、彈性模量、泊松比、抗剪強(qiáng)度、抗拉強(qiáng)度等參數(shù)。完成了煤樣的三軸壓縮試驗,分析了三軸壓縮條件下煤樣的破壞規(guī)律。(3)報據(jù)順槽圍巖地質(zhì)條件、順槽變形、松動圈分布范圍等實(shí)際情況,結(jié)合理論計算得到相關(guān)支護(hù)參數(shù)。采用FLAC數(shù)值模擬方法對順槽圍巖穩(wěn)定性和支護(hù)方案的支護(hù)效果進(jìn)行了評價,模擬結(jié)果表明:淺埋順槽圍巖支護(hù)設(shè)計參數(shù)合理。(4)完成了回采過程中順槽圍巖變形規(guī)律監(jiān)測,得到了順槽表面收斂、圍巖位移、錨桿受力情況、頂板下沉量、頂板離層值、松動圈分布狀況和超前單體液壓支柱受力等數(shù)據(jù)。工程實(shí)踐表明,支護(hù)方案安全可行。研究成果可為神南礦區(qū)其他煤礦以及該礦4-2煤其他備采工作面順槽支護(hù)提供參考。
[Abstract]:It is of great engineering significance and value to carry out the supporting design of 4-2 24201 coal face in Shennan mining area. The deformation mechanism of surrounding rock along the channel is studied by theoretical method. The physical and mechanical properties of surrounding rock are studied through laboratory tests. The support effect is evaluated by numerical simulation and field monitoring. The main conclusions are as follows: (1) the stress distribution characteristics of surrounding rock along channel in shallow coal seam are analyzed. The main influencing factors of surrounding rock deformation in shallow seam include: depth of burial, nature of surrounding rock, ground stress of surrounding rock, mining activity, groundwater, support design and construction quality. The main deformation and failure forms of surrounding rock are tensile fracture, shear failure and composite failure. The indoor physical and mechanical tests of 4-2 coal samples have been completed. The uniaxial compressive strength, elastic modulus and Poisson's ratio of natural and saturated coal samples are obtained. Shear strength, tensile strength and other parameters. The triaxial compression test of coal sample is completed, and the failure rule of coal sample under triaxial compression condition is analyzed. According to the geological conditions of surrounding rock, deformation and distribution range of loosening circle, and so on, the relevant supporting parameters are obtained by theoretical calculation. The FLAC numerical simulation method is used to evaluate the stability of surrounding rock and the supporting effect of the supporting scheme. The simulation results show that the deformation law of surrounding rock along the trench is monitored by reasonable design parameters of shallow-buried surrounding rock in the process of mining. The data of surface convergence, displacement of surrounding rock, stress of anchor rod, subsidence of roof, value of roof separation, distribution of loose ring and stress of leading single hydraulic prop were obtained. Engineering practice shows that the supporting scheme is safe and feasible. The results can be used as a reference for other coal mines in Shennan mining area and other working faces of 4-2 coal in this mine.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD323;TD355

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