本文選題：覆巖空間結(jié)構(gòu) + 巖層運(yùn)動(dòng)　； 參考：《河北工程大學(xué)》2015年碩士論文

【摘要】：伴隨著淺部煤炭資源的日益殆盡,深部煤炭開(kāi)采已成為新時(shí)期我國(guó)能源保障的重要手段。根據(jù)有關(guān)資料顯示,我國(guó)已經(jīng)探明的深度在1000米以下的煤炭?jī)?chǔ)量達(dá)到2.95萬(wàn)億噸,占煤炭資源總量的53%。但隨著煤炭開(kāi)采深度的不斷增加,采場(chǎng)圍巖的力學(xué)特性也逐漸發(fā)生了改變,不僅頂板管理越發(fā)困難,沖擊地壓發(fā)生的可能也越來(lái)越高,這使得煤炭開(kāi)采遭受動(dòng)力災(zāi)害的可能越來(lái)越大,以地應(yīng)力為主導(dǎo)的沖擊地壓事故的防治難度在加大。進(jìn)入深部開(kāi)采后,決定礦山壓力顯現(xiàn)程度的運(yùn)動(dòng)巖層在厚度和層面方向上已經(jīng)超出傳統(tǒng)的平面模型范圍,所形成的覆巖空間結(jié)構(gòu)的運(yùn)動(dòng)影響著采動(dòng)應(yīng)力場(chǎng)的分布。本論文重點(diǎn)進(jìn)行深部復(fù)雜條件開(kāi)采煤巖采動(dòng)災(zāi)害機(jī)理及危險(xiǎn)性多因素耦合致災(zāi)機(jī)理方法的研究,針對(duì)邊界條件為兩面采空區(qū)和三面采空區(qū)(孤島工作面)采場(chǎng)巖層運(yùn)動(dòng)規(guī)律,結(jié)合數(shù)值模擬分析,揭示深部開(kāi)采煤層覆巖采動(dòng)階段多因素耦合災(zāi)變機(jī)理。首先從宏觀角度分析,通過(guò)地質(zhì)條件和開(kāi)采因素對(duì)工作面沖擊危險(xiǎn)性的影響,確定出工作面在推進(jìn)過(guò)程中可能會(huì)發(fā)生沖擊地壓的區(qū)域。然后運(yùn)用多因素耦合致災(zāi)機(jī)理的研究方法,通過(guò)對(duì)工作面煤巖結(jié)構(gòu)、地質(zhì)構(gòu)造、覆巖空間結(jié)構(gòu)的運(yùn)動(dòng)等因素的分析,對(duì)每一因素單獨(dú)分析,劃出危險(xiǎn)區(qū)域,最后通過(guò)危險(xiǎn)區(qū)域可以看到有重疊部分,這些重疊部分危險(xiǎn)程度更大,以此,區(qū)分危險(xiǎn)程度的不同,劃分出不同區(qū)域。結(jié)合工程實(shí)例,利用微地震監(jiān)測(cè)結(jié)果和力學(xué)結(jié)果驗(yàn)證采動(dòng)階段應(yīng)力場(chǎng)時(shí)空分布規(guī)律及多因素耦合致災(zāi)機(jī)理。
[Abstract]:With the increasing depletion of shallow coal resources, deep coal mining has become an important means of energy security in China in the new period. According to the relevant data, the proven coal reserves below 1000 meters have reached 2.95 trillion tons, accounting for 53% of the total coal resources. However, with the increasing of coal mining depth, the mechanical properties of surrounding rock of stope have gradually changed, not only the roof management is more difficult, but also the possibility of impact ground pressure is higher and higher. As a result, it is more and more likely that coal mining will suffer from dynamic disasters, and it is becoming more difficult to prevent and cure ground burst accidents which are dominated by in-situ stress. After entering deep mining, the thickness and direction of the moving rock layer which determines the degree of mine pressure appearance has exceeded the traditional plane model, and the movement of the overburden spatial structure affects the distribution of the mining stress field. This paper focuses on the study of mining disaster mechanism and hazard multi-factor coupling disaster mechanism of mining rock in complex conditions of deep mining, aiming at the movement law of stope strata in two-face goaf and three-sided goaf (Gudao face) with boundary condition. Combined with numerical simulation analysis, the coupling disaster mechanism of multiple factors in mining stage of overburden rock in deep mining seam is revealed. Firstly, from the macroscopic point of view, through the influence of geological conditions and mining factors on the impact risk of the working face, the area where the impact ground pressure may occur in the working face during the process of propulsion is determined. Then, by using the method of multi-factor coupling mechanism research, through the analysis of coal and rock structure, geological structure, movement of overburden space structure and so on, each factor is separately analyzed, and the dangerous area is delineated. Finally, we can see that there are overlapped parts through the dangerous areas, which are more dangerous. By this way, we can distinguish the different degree of danger and divide the different regions. Combined with engineering examples, microseismic monitoring results and mechanical results are used to verify the temporal and spatial distribution of stress field in mining stage and the mechanism of coupling disaster caused by multiple factors.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD324

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本文編號(hào)：1930002