【摘要】：煤礦開采進(jìn)入深部以后,巷道圍巖巖性特征與礦山壓力分布規(guī)律與淺部開采存在較大的差異。深部巷道表現(xiàn)出高地應(yīng)力、圍巖低強(qiáng)度的特性,如仍延用淺部巷道支護(hù)設(shè)計(jì)方法,巷道圍巖變形嚴(yán)重、返修量大、支護(hù)成本高,礦井安全開采控制難度增大。本文以王樓煤礦27304工作面回采巷道為工程背景,采用理論分析、數(shù)值模擬及現(xiàn)場(chǎng)工業(yè)性試驗(yàn)相結(jié)合的方法對(duì)千米深井采煤工作面沿空掘巷巷道圍巖變形破壞規(guī)律及支護(hù)技術(shù)進(jìn)行研究。首先,分析了沿空巷道上覆巖層在掘進(jìn)前、掘進(jìn)后及采煤工作面回采期間的結(jié)構(gòu)特點(diǎn)及運(yùn)動(dòng)規(guī)律;其次,基于極限平衡區(qū)理論與彈性理論建立了深部沿空巷道圍巖力學(xué)分析模型,分析了煤層埋深對(duì)沿空巷道圍巖應(yīng)力及位移分布的影響;采用FLAC3D軟件模擬計(jì)算了留設(shè)3m、4m、5m、6m、7m、8m寬度的區(qū)段煤柱條件下巷道圍巖位移與應(yīng)力分布規(guī)律,結(jié)合理論計(jì)算結(jié)果得出了煤柱寬度留設(shè)的合理尺寸為4.5m;通過分析深部回采巷道變形破壞的原因,對(duì)王樓煤礦27304工作面沿空巷道支護(hù)方案重新設(shè)計(jì)并進(jìn)行了現(xiàn)場(chǎng)工業(yè)性試驗(yàn)。現(xiàn)場(chǎng)觀測(cè)表明:60d內(nèi)巷道兩幫最大移近量163mm;頂板最大下沉量76mm,并趨于穩(wěn)定。采用新的支護(hù)方案后沿空巷道圍巖變形得到有效控制,對(duì)深部開采條件下沿空巷道支護(hù)方案科學(xué)設(shè)計(jì)、礦井安全高效生產(chǎn)具有重要的指導(dǎo)意義。
[Abstract]:After the coal mining enters into the deep part, there are great differences between the lithologic characteristics of roadway surrounding rock and the distribution law of mine pressure and shallow mining. The deep roadway shows the characteristics of high ground stress and low strength of surrounding rock, such as the shallow roadway support design method is still used, the surrounding rock deformation of roadway is serious, the amount of repair is large, the support cost is high, and the difficulty of mine safety mining control is increased. Taking the mining roadway of 27304 working face of Wanglou Coal Mine as the engineering background, this paper adopts theoretical analysis. The method of numerical simulation and field industrial test is used to study the deformation and failure law of surrounding rock and supporting technology of roadway along goaf in kilometer deep coal mining face. Firstly, the structural characteristics and movement law of the overlying strata in the roadway along the goaf before, after the excavation and during the mining face are analyzed. Based on the limit equilibrium zone theory and elastic theory, a mechanical analysis model of deep goaf roadway surrounding rock is established, and the influence of coal seam burial depth on surrounding rock stress and displacement distribution of goaf roadway is analyzed. By using FLAC3D software, the displacement and stress distribution of surrounding rock of roadway under the condition of coal pillar width of 3 m, 4 m, 5 m, 6 m, 7 m and 8 m are simulated and calculated. According to the theoretical calculation results, the reasonable size of the width of coal pillar is 4.5 m. By analyzing the causes of deformation and failure of deep mining roadway, the supporting scheme of gob roadway in 27304 face of Wanglou Coal Mine is redesigned and the industrial test is carried out on the spot. The field observation shows that the maximum movement of the two sides of the roadway is 163mm in 60 days and the maximum subsidence of the roof is 76mm, which tends to be stable. The deformation of surrounding rock of gob roadway is controlled effectively by adopting new support scheme, which is of great significance for scientific design of roadway support scheme and safe and efficient production of mine under deep mining conditions.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD353

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王德超;李術(shù)才;王琦;李為騰;王富奇;王洪濤;彭蓬;阮國(guó)強(qiáng);;深部厚煤層綜放沿空掘巷煤柱合理寬度試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2014年03期

2 華心祝;劉淑;劉增輝;查文華;李迎富;;孤島工作面沿空掘巷礦壓特征研究及工程應(yīng)用[J];巖石力學(xué)與工程學(xué)報(bào);2011年08期

3 康紅普;王金華;林健;;高預(yù)應(yīng)力強(qiáng)力支護(hù)系統(tǒng)及其在深部巷道中的應(yīng)用[J];煤炭學(xué)報(bào);2007年12期

4 謝廣祥;楊科;劉全明;;綜放面傾向煤柱支承壓力分布規(guī)律研究[J];巖石力學(xué)與工程學(xué)報(bào);2006年03期

5 何滿潮,謝和平,彭蘇萍,姜耀東;深部開采巖體力學(xué)研究[J];巖石力學(xué)與工程學(xué)報(bào);2005年16期

6 錢鳴高,許家林,繆協(xié)興;煤礦綠色開采技術(shù)[J];中國(guó)礦業(yè)大學(xué)學(xué)報(bào);2003年04期

7 楊建輝,蔡美峰;不穩(wěn)定頂板條件下煤巷錨網(wǎng)索梁支護(hù)實(shí)踐[J];煤炭科學(xué)技術(shù);2002年08期

8 尤明慶,華安增;巖石試樣破壞過程的能量分析[J];巖石力學(xué)與工程學(xué)報(bào);2002年06期

9 賈光勝,康立軍;綜放開采采準(zhǔn)巷道護(hù)巷煤柱穩(wěn)定性研究[J];煤炭學(xué)報(bào);2002年01期

10 王衛(wèi)軍,黃成光,侯朝炯,彭剛;綜放沿空掘巷底鼓的受力變形分析[J];煤炭學(xué)報(bào);2002年01期

相關(guān)博士學(xué)位論文 前2條

1 王德超;千米深井綜放沿空掘巷圍巖變形破壞演化機(jī)理及控制研究[D];山東大學(xué);2015年

2 溫克珩;深井綜放面沿空掘巷窄煤柱破壞規(guī)律及其控制機(jī)理研究[D];西安科技大學(xué);2009年

相關(guān)碩士學(xué)位論文 前1條

1 劉權(quán);四臺(tái)煤礦沿空掘巷圍巖控制技術(shù)研究[D];中國(guó)礦業(yè)大學(xué);2014年

，

本文編號(hào)：2135417