發(fā)布時(shí)間：2018-06-04 07:37

  本文選題：三軟煤層巷道 + 滑動(dòng)構(gòu)造帶��； 參考：《西安科技大學(xué)》2015年碩士論文

【摘要】：三軟煤層巷道支護(hù)是煤巷支護(hù)技術(shù)難題之一,本論文以河南告成滑動(dòng)構(gòu)造帶三軟煤層20161下付巷支護(hù)為研究對(duì)象,在分析巷道變形破壞特征的基礎(chǔ)上,采用數(shù)值模擬、物理模擬及極限平衡圈理論分析相結(jié)合的方法,揭示了告成煤礦巷道變形破壞規(guī)律,確定了合理的支護(hù)參數(shù)和支護(hù)方案,為該礦三軟煤層巷道支護(hù)設(shè)計(jì)提供了依據(jù)。通過(guò)現(xiàn)場(chǎng)取樣和巖石力學(xué)實(shí)驗(yàn),測(cè)定了告成煤礦三軟煤層巷道圍巖物理力學(xué)參數(shù);通過(guò)巷道變形破壞規(guī)律實(shí)測(cè),得出了巷道四周收斂變形,移近量最大達(dá)到850mm~950mm,以頂?shù)资諗孔冃螢橹?是兩幫變形量的1.27倍;運(yùn)用數(shù)值計(jì)算及物理模擬分析了三軟煤層巷道變形破壞機(jī)理,得出了告成煤礦巷道主要表現(xiàn)為右?guī)推茐暮晚數(shù)装逑鲁�。�?jù)此,提出了反底拱巷道優(yōu)化斷面,數(shù)值模擬表明巷道獲得了右?guī)褪芰ν猩喜哭D(zhuǎn)移,頂?shù)装逡平拷档偷男Ч；谲浀装鍡l件,分別建立了僅考慮頂板影響、考慮兩幫—頂板影響、考慮底板—兩幫—頂板共同影響的巷道頂板平衡拱和巷道平衡圈計(jì)算模型,給出了平衡拱的解析表達(dá)式,分析了巷道底板、兩幫、頂板三者的相互影響關(guān)系,確定了支護(hù)參數(shù)的計(jì)算公式。收集了類似14條巷道支護(hù)參數(shù),通過(guò)工程類比法結(jié)合巷道圍巖平衡圈理論分析,確定了錨網(wǎng)索噴+幫中部4m錨桿+W型鋼帶聯(lián)合支護(hù)方式。最后,通過(guò)物理及數(shù)值模擬對(duì)方案可靠性進(jìn)行驗(yàn)證及評(píng)價(jià)。
[Abstract]:Roadway support in three soft coal seams is one of the difficult technical problems in coal roadway support. This paper takes 20161 soft coal seam underpaid roadway support in Gaocheng sliding structure belt of Henan Province as the research object, based on the analysis of the characteristics of roadway deformation and failure, adopts numerical simulation. By combining physical simulation with theoretical analysis of limit equilibrium circle, the deformation and failure law of roadway in Gaocheng Coal Mine is revealed, and the reasonable supporting parameters and supporting scheme are determined, which provides a basis for the roadway support design in three soft coal seam of Gaocheng Coal Mine. Through field sampling and rock mechanics experiment, the physical and mechanical parameters of surrounding rock of roadway in three soft coal seams of Gaocheng coal mine are measured, and the convergence deformation around roadway is obtained by measuring the law of roadway deformation and failure. The maximum displacement is 850mm / 950mm, which is mainly convergent deformation of the top and bottom, which is 1.27 times that of the two sides. The deformation and failure mechanism of the roadway in the three soft coal seams is analyzed by numerical calculation and physical simulation. It is concluded that the roadway of Goucheng coal mine is mainly reflected in the damage of the right side and the sinking of the roof and floor. Based on this, the optimized section of reverse arch tunnel is put forward. The numerical simulation shows that the right side forces are transferred to the middle and upper part of the tunnel, and the roof and floor movement is reduced. Based on the soft floor condition, the calculation models of roadway roof equilibrium arch and roadway equilibrium circle are established, which only consider the influence of roof, consider the influence of two sides and roof, consider the influence of floor and two sides, and give the analytical expression of equilibrium arch. The relationship among the floor, the two sides and the roof of the roadway is analyzed, and the formula of the supporting parameters is determined. The supporting parameters of 14 similar roadways are collected. By combining the engineering analogy method with the theoretical analysis of the surrounding rock equilibrium circle of the roadway, the combined support mode of the 4 m anchor bolt W type steel belt in the middle of the bolting wire mesh and shotcreting slope is determined. Finally, the reliability of the scheme is verified and evaluated by physical and numerical simulation.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353.6

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