【摘要】：采區(qū)大斷面硐室是服務(wù)整個(gè)采區(qū)用作專(zhuān)門(mén)用途的硐室,一般與多個(gè)巷道硐室密集布置,力學(xué)環(huán)境復(fù)雜,其永久支護(hù)效果直接影響煤礦高效生產(chǎn)。采區(qū)皮帶機(jī)頭硐室一般位于采區(qū)運(yùn)輸上下山的端部,是運(yùn)煤、排矸等重大系統(tǒng)的核心部位。本文以告成煤礦25采區(qū)皮帶機(jī)頭硐室圍巖穩(wěn)定性分析及其控制技術(shù)研究為背景,首先結(jié)合彈性力學(xué)模型和基于莫爾庫(kù)倫準(zhǔn)則的數(shù)值模型,分析硐室斷面半徑、寬高比和相鄰硐室位置對(duì)大斷面硐室圍巖力學(xué)環(huán)境的影響,應(yīng)用彈性力學(xué)半無(wú)限體理論,得出了一側(cè)采空煤柱底板巖層應(yīng)力分布情況;然后,根據(jù)現(xiàn)場(chǎng)調(diào)查告成煤礦25采區(qū)皮帶機(jī)頭硐室地質(zhì)采礦條件及其圍巖變形破壞特征,分析硐室變形破壞的主要影響因素,并采用數(shù)值模擬手段,對(duì)比分析硐室自身結(jié)構(gòu)影響、多層巷道空間影響、支承壓力影響三種條件硐室力學(xué)響應(yīng)圍巖破裂屈服范圍、圍巖變形及圍巖應(yīng)力分布情況。在上述研究的基礎(chǔ)上,提出了高強(qiáng)二次錨網(wǎng)索支護(hù)+全斷面注漿加固+底板高強(qiáng)錨網(wǎng)索支護(hù)的大斷面支護(hù)技術(shù),分析了該支護(hù)技術(shù)的機(jī)理,并采用數(shù)值模擬手段驗(yàn)證了該支護(hù)技術(shù)對(duì)復(fù)雜條件下大斷面硐室圍巖控制的有效性;最后,結(jié)合告成煤礦25采區(qū)皮帶機(jī)頭硐室地質(zhì)采礦條件,根據(jù)全斷面錨網(wǎng)索大斷面支護(hù)技術(shù)核心,確定了硐室支護(hù)技術(shù)方案與參數(shù),并進(jìn)行了工業(yè)性試驗(yàn),取得了良好效果。
[Abstract]:The large section chamber of mining area is a chamber which serves the whole mining area as a special purpose. Generally, it is densely arranged with many tunnel chambers, and the mechanical environment is complex. The permanent support effect directly affects the efficient production of coal mines. The head chamber of belt conveyor in mining area is generally located at the end of the upper and lower mountain transportation in the mining area, which is the core part of major systems such as coal transportation and gangue removal. In this paper, based on the study of surrounding rock stability analysis and control technology of belt conveyor head chamber in 25 mining area of Goucheng Coal Mine, the section radius of chamber is analyzed by combining elastic mechanics model and numerical model based on Moore Coulomb criterion. The influence of aspect ratio and adjacent chamber position on the surrounding rock mechanical environment of large section chamber is studied. The stress distribution of the bottom slab of coal pillar is obtained by using the theory of semi-infinite body of elastic mechanics. According to the site investigation of the geological mining conditions and the deformation and failure characteristics of surrounding rock in the head chamber of belt conveyor in 25 mining area of Gaocheng Coal Mine, the main influencing factors of the deformation and failure of the chamber are analyzed, and the influence of the chamber's own structure is analyzed by numerical simulation. The space effect of multi-layer roadway and the bearing pressure affect the mechanical response of the chamber to the failure and yield range of surrounding rock, the deformation of surrounding rock and the distribution of stress of surrounding rock. On the basis of the above research, the large section support technology of high strength secondary bolting wire mesh and cable supporting is put forward, and the mechanism of this support technology is analyzed. Numerical simulation is used to verify the effectiveness of this support technology in controlling the surrounding rock of large section chamber under complex conditions. Finally, combined with the geological mining conditions of head chamber of belt machine in 25 mining area of Gaocheng Coal Mine, According to the technical core of bolt-mesh cable large-section support with full section, the technical scheme and parameters of chamber support are determined, and industrial tests are carried out, and good results are obtained.
【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】：2015
【分類(lèi)號(hào)】：TD354

【引證文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 康紅普;林健;吳擁政;;高應(yīng)力巷道強(qiáng)力錨桿支護(hù)技術(shù)及應(yīng)用[A];第十屆全國(guó)巖石力學(xué)與工程學(xué)術(shù)大會(huì)論文集[C];2008年

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本文編號(hào)：2234087