本文選題：應(yīng)力殼 + 采深��； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：本文是在采場(chǎng)圍巖應(yīng)力殼理論的基礎(chǔ)上,采用實(shí)驗(yàn)室相似模擬、計(jì)算機(jī)數(shù)值模擬相結(jié)合的綜合研究手段,以淮南礦業(yè)集團(tuán)謝橋煤礦11318E綜采工作面為主要工程背景,深入系統(tǒng)的研究了采深對(duì)采場(chǎng)圍巖應(yīng)力殼力學(xué)特征的影響規(guī)律。研究發(fā)現(xiàn),采場(chǎng)礦壓顯現(xiàn)受控于應(yīng)力殼的存在和其演化所帶來(lái)的影響。且隨著采深的增加,應(yīng)力殼的高度先基本不變,采深1000m左右處為拐點(diǎn),1000m以上時(shí)應(yīng)力殼的形態(tài)和力學(xué)特征受采深影響顯著,殼高隨著采深的增加而增加,走向殼基距工作面煤壁距離增大,殼基影響范圍也隨之變寬,應(yīng)力殼形態(tài)由扁平殼向拱形殼轉(zhuǎn)變。分析了不同采深情況下采場(chǎng)推進(jìn)過(guò)程中的位移變形和圍巖破壞特點(diǎn),得出工作面變形和破壞主要發(fā)生工作面煤壁前方一定距離內(nèi),且隨著開(kāi)采深度的增大,工作面上覆巖層垂直位移量明顯增大,采場(chǎng)圍巖破壞范圍也隨之增大,充分揭示了深部采場(chǎng)工作面圍巖變形具有近場(chǎng)效應(yīng),且采深越大,圍巖變形近場(chǎng)效應(yīng)越顯著。研究結(jié)果表明深部礦井應(yīng)力殼的形成機(jī)制仍然明顯,深部礦井采場(chǎng)礦壓顯現(xiàn)仍受控于應(yīng)力殼的存在和其演化帶來(lái)的影響。該研究成果進(jìn)一步揭示了深部采場(chǎng)礦壓顯現(xiàn)與采深的關(guān)系,該研究對(duì)深部礦井采場(chǎng)圍巖控制、工作面及巷道支護(hù)以及動(dòng)力災(zāi)害防治具有指導(dǎo)意義。
[Abstract]:This paper is based on the stress shell theory of surrounding rock of stope, adopts the laboratory similar simulation and the computer numerical simulation to combine the comprehensive research means, taking the 11318E fully mechanized mining face of Huainan Mining Group as the main engineering background. The influence of mining depth on the mechanical characteristics of stress shell in surrounding rock of stope is studied systematically. It is found that stope pressure is controlled by the existence of stress shell and its evolution. With the increase of mining depth, the height of the stress shell is basically unchanged, and the shape and mechanical characteristics of the stress shell are significantly affected by the mining depth when the depth is above 1000 m, and the height of the shell increases with the increase of mining depth. With the increase of the distance between strike base and coal face wall, the influence range of shell base becomes wider, and the shape of stress shell changes from flat shell to arch shell. The characteristics of displacement deformation and surrounding rock failure in the process of stope advance under different mining depth are analyzed. It is concluded that the deformation and destruction of the face mainly occur within a certain distance in front of the coal wall of the working face, and with the increase of mining depth, The vertical displacement of overlying strata increases obviously and the failure range of surrounding rock increases, which fully reveals that the deformation of surrounding rock in deep stope has near-field effect, and the bigger the mining depth is, the more obvious is the near-field effect of surrounding rock deformation. The results show that the formation mechanism of deep mine stress crust is still obvious, and the formation of mine pressure in deep mine stope is still controlled by the existence of stress shell and the influence of its evolution. The research results further reveal the relationship between mine pressure appearance and mining depth in deep stope. This study has a guiding significance for the control of surrounding rock in deep mine stope, support of face and roadway, and prevention and control of dynamic disaster.
【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】：2017
【分類號(hào)】：TD311

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