本文選題：堅(jiān)硬頂板　切入點(diǎn)：采空區(qū)下　出處：《安徽理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以10202運(yùn)輸巷為工程背景,在系統(tǒng)研究新生礦巷道礦壓特征、巷道的支護(hù)現(xiàn)狀及圍巖變形破壞特征的基礎(chǔ)上,采用現(xiàn)場(chǎng)取樣、實(shí)驗(yàn)室試驗(yàn)、數(shù)值模擬和理論分析等研究方法,對(duì)新生礦9#煤層采空區(qū)下10#煤層回采巷道圍巖穩(wěn)定性分類及控制技術(shù)進(jìn)行研究。為了達(dá)到礦井安全、經(jīng)濟(jì)、有效的目標(biāo),以便于實(shí)現(xiàn)新生礦巷道支護(hù)設(shè)計(jì)的系統(tǒng)化、科學(xué)化和定量化,改變巷道支護(hù)靠工程類比或經(jīng)驗(yàn)設(shè)計(jì)的歷史狀況,降低一次成巷支護(hù)成本,減少由于巷道受到變形破壞的維修工程量。其主要研究結(jié)論如下： (1)對(duì)9#煤底板采空區(qū)破壞深度范圍及煤柱載荷作用下底板應(yīng)力分布規(guī)律進(jìn)行了研究,為研究10#煤回采巷道的變形破壞程度及受力情況提供了理論依據(jù)。 (2)根據(jù)現(xiàn)場(chǎng)取芯及實(shí)驗(yàn)室測(cè)定,得到了得到了新生煤礦10102運(yùn)輸巷的圍巖力學(xué)參數(shù),巷道圍巖參數(shù)測(cè)試結(jié)果為理論計(jì)算及數(shù)值模擬提供了參數(shù)依據(jù),同時(shí)也將為后續(xù)的支護(hù)參數(shù)設(shè)計(jì)及頂板管理提供科學(xué)依據(jù)。 (3)針對(duì)10202運(yùn)輸巷的地質(zhì)條件,提出了采用頂板錨網(wǎng)索+鋼帶、幫部錨網(wǎng)的支護(hù)方式,并在掘進(jìn)期間對(duì)10202運(yùn)輸巷道進(jìn)行了現(xiàn)場(chǎng)實(shí)測(cè),測(cè)試結(jié)果表明在掘進(jìn)期間掘進(jìn)工作面前、后方21m左右的范圍內(nèi)巷道圍巖基本處于穩(wěn)定階段,錨桿受力變化較小,沒有發(fā)生離層現(xiàn)象。 (4)根據(jù)10202運(yùn)輸巷賦存及地質(zhì)條件及巖石力學(xué)試驗(yàn)參數(shù)為數(shù)值模擬的基礎(chǔ)參數(shù),建立模型,對(duì)10202運(yùn)輸巷在掘進(jìn)及工作面回采期間巷道圍巖變形破壞特征進(jìn)行三維有限差分?jǐn)?shù)值模擬研究,并結(jié)合10202運(yùn)輸巷在掘進(jìn)期間的現(xiàn)場(chǎng)礦壓觀測(cè)結(jié)果,確定了10煤主采巷道為錨桿支護(hù)形式,提出了錨網(wǎng)索聯(lián)合支護(hù)方式并給出了支護(hù)參數(shù)。
[Abstract]:Based on the engineering background of 10202 transport roadway, on the basis of systematically studying the characteristics of roadway pressure, the supporting status of roadway and the characteristics of deformation and failure of surrounding rock, the research methods such as field sampling, laboratory test, numerical simulation and theoretical analysis are adopted in this paper. The stability classification and control technology of surrounding rock in mining roadway of No. 10# coal seam under the goaf of No. 9# coal seam in new coal mine are studied. In order to achieve the goal of safety, economy and efficiency of coal mine, it is convenient to realize the systematization of roadway support design in new coal mine. Scientific and quantitative, changing the historical situation of engineering analogy or experience design of roadway support, reducing the cost of primary roadway support and reducing the amount of maintenance works due to roadway deformation and destruction. The main research conclusions are as follows:. 1) the depth of damage in goaf of 9# coal floor and the stress distribution law of floor under the action of coal pillar load are studied, which provides a theoretical basis for studying the degree of deformation and failure and the stress situation of coal mining roadway of 10#. The mechanical parameters of surrounding rock of No. 10102 transport roadway in Xinxing Coal Mine are obtained according to the field coring and laboratory measurements. The test results of surrounding rock parameters of the roadway provide a parameter basis for theoretical calculation and numerical simulation. At the same time, it will provide scientific basis for the design of supporting parameters and roof management. In view of the geological conditions of 10202 transport roadway, the supporting method of roof bolting net cable steel belt and bolting net is put forward, and the site measurement of 10202 transport roadway is carried out during the excavation. The test results show that in front of the tunneling work during the excavation period, The surrounding rock of roadway is basically in the stable stage in the range of 21 m or so in the rear, and the stress of the bolt changes little, and there is no phenomenon of separation. According to the occurrence, geological conditions and rock mechanics test parameters of 10202 transport roadway as the basic parameters of numerical simulation, the model is established. The deformation and failure characteristics of surrounding rock of 10202 transport roadway during tunneling and mining face are studied by 3D finite difference numerical simulation, and combined with the field ground pressure observation results of 10202 transport roadway during tunneling. The bolting support form of 10 coal main mining roadway is determined, and the combined support mode of anchor, mesh and cable is put forward and the supporting parameters are given.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

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