發(fā)布時(shí)間：2018-03-09 10:54

  本文選題：節(jié)理　切入點(diǎn)：大斷面　出處：《中國(guó)礦業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：石拉烏素煤礦主采煤層埋深達(dá)到680m左右,2-2上201工作面是該礦井的首采面,工作面回風(fēng)順槽斷面大(寬5m、高4m左右),圍巖節(jié)理發(fā)育、整體強(qiáng)度低。因此本文基于石拉烏素煤礦東翼2-2上201工作面回風(fēng)順槽的地質(zhì)條件,采用實(shí)驗(yàn)室實(shí)驗(yàn)、理論分析、數(shù)值模擬及現(xiàn)場(chǎng)實(shí)測(cè)相結(jié)合的方法,研究了石拉烏素煤礦節(jié)理發(fā)育大斷面回采巷道圍巖的變形規(guī)律,優(yōu)化了相關(guān)支護(hù)參數(shù),形成了有效的支護(hù)控制技術(shù)。得出以下主要結(jié)論:(1)理論分析了回采與節(jié)理對(duì)巷道圍巖強(qiáng)度、塑性區(qū)及位移的影響規(guī)律并給出了理論計(jì)算公式。(2)采用UDEC數(shù)值模擬研究了節(jié)理角度對(duì)巷道圍巖穩(wěn)定性的影響規(guī)律,結(jié)果表明節(jié)理角度15°時(shí)塑性區(qū)、位移量最大。圍巖深部位移沿節(jié)理方向剪切滑移,圍巖表面發(fā)生拉伸破壞。(3)數(shù)值模擬表明結(jié)果表明,由掘進(jìn)引起的巷道位移、應(yīng)力較小�；夭蓵r(shí),距工作面20m為巷道圍巖變形劇烈區(qū),20m-45m為巷道圍巖變形緩慢區(qū),45m外巷道圍巖變形基本不受采動(dòng)影響,最終巷道兩幫變形量在350mm左右,頂板下沉量為250mm左右。(4)采用理論計(jì)算初步設(shè)計(jì)了石拉烏素煤礦節(jié)理發(fā)育煤層回采巷道的支護(hù)方案。并采用UDEC數(shù)值模擬優(yōu)化確定了回風(fēng)順槽幫部錨桿間距為900mm、頂板間距為800mm,排距為900mm。(5)研究結(jié)果在現(xiàn)場(chǎng)進(jìn)行了應(yīng)用,并實(shí)測(cè)了應(yīng)用效果,實(shí)測(cè)結(jié)果表明:掘進(jìn)時(shí)巷道表面位移為十幾毫米,巷道錨桿、錨索受力較小,回風(fēng)順槽圍巖變形得到了有效的控制。
[Abstract]:Raoul stone in main coal mining coal seam buried depth is about 680m, 2-2 on the 201 working face of coal mine is the first mining face, face groove section (width 5m, height of about 4m), rock joint development, the overall strength is low. So the geological conditions in coal mine stone Raoul East Wing 2-2 on 201 the surface groove based on the laboratory experiment, theoretical analysis, numerical simulation and field measurement method of combining the study of deformation rule of stone Raoul in mine joint development of surrounding rock of large section roadway, optimize the related supporting parameters, the formation of effective support and control technology. The main conclusions are as follows: (1) theoretical analysis of the mining and joints on the surrounding rock strength, influence law of plastic zone and displacement and the calculation formulas are given. (2) effect of joint angle on the stability of surrounding rock is studied by UDEC numerical simulation results show that the joint angle. 15 degrees when the plastic zone, the maximum displacement. The deep displacement of surrounding rock along the shear direction of slip joints, the tensile failure of rock surface. (3) the numerical simulation results show that the roadway displacement by tunneling, less stress. When mining, 20m away from the face of intense deformation of roadway surrounding rock 20m-45m for the deformation of surrounding rock deformation is slow, basically not affected by mining 45m rock roadway, the final deformation of two sides of roadway roof subsidence at about 350mm, about 250mm. (4) the theoretical calculation of the preliminary design of the stone Raoul in mine joint development coal mining roadway supporting scheme. Simulation and optimization the groove part of the rock bolt spacing is 900mm by UDEC numerical, roof distance is 800mm, the row spacing was 900mm. (5) the results of the study in the field of application, and the actual application effect, the test results show that the excavation roadway surface displacement is 10 mm, The roadway bolt, the stress of the anchor cable is small, the deformation of the surrounding rock of the return wind is effectively controlled.

【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TD353

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本文編號(hào)：1588214