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  本文關(guān)鍵詞： 穿層巷道 非均勻變形規(guī)律 控制技術(shù) 回風(fēng)大巷　出處：《中國礦業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文基于石拉烏素煤礦穿層巷道—回風(fēng)大巷的工程地質(zhì)條件,采用巖石力學(xué)實驗、理論分析、數(shù)值模擬及現(xiàn)場實測相結(jié)合的方法,研究了穿層巷道圍巖非均勻變形規(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)。首先,通過現(xiàn)場巖石取樣,進(jìn)行了巖樣的物理力學(xué)性能參數(shù)測試,結(jié)果表明,巷道圍巖整體強(qiáng)度較低,屬于易破碎的軟巖。其次,在力學(xué)測試實驗的基礎(chǔ)上,運(yùn)用UDEC軟件模擬了不同層位、不同煤厚、不同煤層節(jié)理傾角穿層巷道圍巖的非均勻變形規(guī)律,研究表明,巷道由巖層穿層進(jìn)入煤層,圍巖塑性區(qū)范圍及頂?shù)装遄冃瘟糠謩e增大了2m、190mm;巷道穿層時,圍巖的均質(zhì)性對巷道變形具有很大影響。隨著煤層厚度的增加及圍巖均質(zhì)性的減弱,圍巖塑性區(qū)范圍和變形不再呈對稱分布,且大巷穿層過程中巷道右?guī)妥冃未笥谧髱?頂板變形與底板底鼓隨煤層厚度的增大其差值逐漸變大;隨煤層節(jié)理角度增大巷道兩幫移近量不斷增大,當(dāng)節(jié)理面傾角θ40°時,頂?shù)装逡平侩Sθ增大而增大,而節(jié)理面傾角θ40°時,頂?shù)装迨諗苛侩Sθ增大而減小。再次,根據(jù)穿層大巷圍巖變形規(guī)律,對穿層巷道圍巖支護(hù)方式及參數(shù)進(jìn)行了模擬優(yōu)化研究,最終確定采用錨網(wǎng)索噴+U型支架聯(lián)合支護(hù)方案,可有效地控制穿層大巷圍巖的變形破壞。最后,通過現(xiàn)場工程實踐對穿層大巷圍巖變形規(guī)律進(jìn)行了觀測,觀測表明,石拉烏素煤礦回風(fēng)大巷右?guī)图凹缃菄鷰r受力及變形比左幫和頂板大,大巷進(jìn)入2-2上煤層后,巷道兩幫片幫及頂板變形較穿層前嚴(yán)重,但總體上圍巖控制效果較好。
[Abstract]:In this paper, based on the engineering geological conditions of the tunneling roadway and return wind roadway in Shilawusu Coal Mine, the non-uniform deformation law of the surrounding rock in the roadway through the strata is studied by the methods of rock mechanics experiment, theoretical analysis, numerical simulation and field measurement. The related support parameters are optimized and effective support control technology is formed. Firstly, the physical and mechanical properties of rock samples are tested by rock sampling in situ. The results show that the overall strength of roadway surrounding rock is low. Secondly, on the basis of mechanical test experiment, UDEC software is used to simulate the non-uniform deformation law of roadway surrounding rock with different seam seam inclination angle, different coal thickness and different seam seam. The range of plastic zone of surrounding rock and the deformation of roof and floor are increased by 2mm ~ 190mm respectively, the homogeneity of surrounding rock has a great influence on the deformation of roadway, with the increase of coal seam thickness and the weakening of surrounding rock homogeneity, the roadway enters the coal seam from the stratum through the strata, and the deformation of the roof and floor increases respectively. The range and deformation of the plastic zone of surrounding rock are no longer symmetrical distribution, and the deformation of the right side of roadway is larger than that of the left side in the process of roadway crossing, and the difference between roof deformation and floor heave becomes larger with the increase of coal seam thickness. With the increase of joint angle in coal seam, the two sides of roadway are moving closer. When the angle of inclination of joint surface is 40 擄, the distance of roof and bottom plate increases with the increase of 胃, and the convergence of roof and floor decreases with the increase of 胃 when the angle of inclination of joint plane is 40 擄. Again, when the angle of joint is 40 擄, the convergence of roof and floor decreases with the increase of 胃. According to the deformation law of surrounding rock in roadway, the supporting mode and parameters of tunnel surrounding rock are simulated and optimized, and the combined support scheme of U-type support with anchor, mesh, cable and shotcrete is finally determined. The deformation and failure of surrounding rock in tunnel can be effectively controlled. Finally, through field engineering practice, the deformation law of surrounding rock in tunnel is observed, and the observation shows that, The stress and deformation of the surrounding rock of the right side and the shoulder corner of the return wind main roadway in Shilawusu Coal Mine are larger than that of the left side and the roof. After the roadway enters the 2-2 upper coal seam, the deformation of the two sides of the roadway and the roof is more serious than that of the former, but the control effect of the surrounding rock is better on the whole.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD353

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本文編號：1537019