本文選題：膏體充填 + 充填材料　； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：煤炭是我國(guó)重要的能源資源,其結(jié)構(gòu)占能源資源的近百分之七十。然而,“三下”壓煤?jiǎn)栴}卻嚴(yán)重制約著我國(guó)煤炭行業(yè)的發(fā)展。若不能有效解決,將嚴(yán)重浪費(fèi)國(guó)家能源,而且會(huì)給煤礦企業(yè)造成嚴(yán)峻的就業(yè)壓力等問(wèn)題。膏體充填開(kāi)采作為綠色開(kāi)采技術(shù)的重要組成部分,既可以實(shí)現(xiàn)不遷村采煤,又可以控制地表下沉,是釋放“三下”壓煤的有效開(kāi)采方法。膏體充填開(kāi)采控制地表沉陷的技術(shù)關(guān)鍵是充填材料的強(qiáng)度和長(zhǎng)期穩(wěn)定性,為此論文通過(guò)室內(nèi)實(shí)驗(yàn)對(duì)膏體充填材料的原材料性質(zhì)、充填料漿工作特性、充填體力學(xué)特性等進(jìn)行了深入研究；以本溪彩屯礦801工作面膏體充填開(kāi)采為實(shí)例,采用FLAC~(3D)數(shù)值模擬軟件對(duì)膏體充填開(kāi)采進(jìn)行了數(shù)值模擬研究,取得以下主要成果：(1)自燃煤矸石、粉煤灰特性研究：通過(guò)篩分實(shí)驗(yàn)獲得煤矸石顆粒級(jí)配,級(jí)配良好,符合充填骨料的要求；通過(guò)激光粒度分析儀獲得粉煤灰主要粒徑為0.46μm～30.76μm；通過(guò)X-射線(xiàn)衍射分析儀(XRD)分析出粉煤灰中含大量玻璃體；通過(guò)X-射線(xiàn)熒光光譜分析儀(XRF)分析出粉煤灰的化學(xué)成分中SiO2A1203.Fe203三者含量共占總含量的89.47%,符合作充填材料的基本要求。(2)水泥礦物成分及水泥膠砂實(shí)驗(yàn)研究：通過(guò)XRD知對(duì)水泥早期強(qiáng)度起主要貢獻(xiàn)的硅酸三鈣和鋁酸三鈣含量較多；水泥膠砂實(shí)驗(yàn)實(shí)測(cè)水泥3d強(qiáng)度為16.96MPa,28 d強(qiáng)度為40.59 MPa,3 d強(qiáng)度是28 d強(qiáng)度的41.78%,早期強(qiáng)度較高。(3)膏體充填料漿工作特性實(shí)驗(yàn)研究：通過(guò)測(cè)定膏體充填料漿塌落度、擴(kuò)展度、分層度及泌水率值來(lái)反應(yīng)膏體充填料漿的工作特性,得出膏體塌落度與擴(kuò)展度隨粉煤灰摻量、細(xì)矸率的增加呈先緩慢上升后下降的趨勢(shì),隨水泥摻量和質(zhì)量濃度的增加呈下降趨勢(shì)；分層度與泌水率隨粉煤灰摻量、水泥摻量、細(xì)矸率和泌水率的增加呈遞減的趨勢(shì)。(4)膏體充填體力學(xué)特性的實(shí)驗(yàn)研究：通過(guò)測(cè)定膏體立方體抗壓強(qiáng)度來(lái)反應(yīng)膏體充填體的力學(xué)特性,得出抗壓強(qiáng)度隨著粉煤灰摻量、水泥摻量和質(zhì)量濃度的增加而增加,隨細(xì)矸率的增加,強(qiáng)度先增加后下降。且粉煤灰摻量及水泥摻量對(duì)膏體中后期強(qiáng)度影響較大,質(zhì)量濃度對(duì)早期強(qiáng)度影響顯著,細(xì)矸率對(duì)膏體發(fā)展的整個(gè)過(guò)程都有影響。(5)運(yùn)用FLAC~(3D)數(shù)值模擬軟件,結(jié)合本溪彩屯礦801工作面膏體充填開(kāi)采地質(zhì)采礦條件,建立了數(shù)值模型,模擬充填開(kāi)采后的地表沉陷,獲得了工作面地表沉降值,并將模擬結(jié)果和實(shí)測(cè)結(jié)果進(jìn)行了對(duì)比分析。
[Abstract]:Coal is an important energy resource in China, its structure accounts for nearly seventy percent of the energy resources. However, the "three under" coal pressing problem seriously restricts the development of the coal industry in China. If it can not be effectively solved, it will seriously waste the national energy, and will cause serious employment pressure on the coal mining enterprises. The important component of color mining technology can not only realize the non relocation of the village coal mining, but also control the subsidence of the surface. It is an effective method to release the "three under" coal pressure. The key to control the surface subsidence by the paste filling mining is the strength and long-term stability of the filling material. Therefore, the original material of the paste filling material is carried out through the laboratory experiment. The properties of the material, the working characteristics of filling slurry and the mechanical properties of the filling body have been deeply studied. Taking the 801 working face paste filling mining in Benxi color Tun mine as an example, the numerical simulation of the paste filling mining is carried out by FLAC~ (3D) numerical simulation software, and the following main achievements have been obtained: (1) the study of the characteristics of spontaneous combustion coal gangue and fly ash: through the study of the characteristics of the fly ash; The gradation of coal gangue particles is obtained by the screening experiment. The particle size is good and meets the requirements of filling aggregate. The main particle size of fly ash is 0.46 m to 30.76 mu m by laser particle size analyzer; a large number of vitreous bodies in fly ash are analyzed by X- ray diffraction analyzer (XRD); fly ash is analyzed by X- ray fluorescence spectrometer (XRF). The content of SiO2A1203.Fe203 three in the chemical composition is 89.47% of the total content, which is the basic requirement of the cooperative filling material. (2) the experimental study of cement mineral composition and cement mortar: the content of calcium silicate three calcium and aluminic acid three calcium, which is the main contribution to the early strength of cement, is more than that of the cement mortar, and the cement mortar test results on the cement 3D strength of 16.96MPa, 2 8 D strength is 40.59 MPa, 3 D strength is 41.78% of 28 d strength, and early strength is higher. (3) experimental study on the working characteristics of paste filling slurry. By measuring the collapse degree, expansion, delamination and bleeding rate of the paste filling slurry, the work characteristics of paste filling slurry are measured, and the collapse degree and expansion of the paste with the fly ash content and the fine waste rate are obtained. The increase of cement content and mass concentration decreased with the increase of cement content and mass concentration; the stratification and bleeding rate decreased with the amount of fly ash, cement content, the rate of fine waste and the rate of bleeding. (4) the experimental study on the mechanical properties of paste filling body: by measuring the cube compressive strength of the paste body According to the mechanical properties of the paste filling body, it is concluded that the compressive strength increases with the increase of fly ash content, cement content and mass concentration. With the increase of the rate of slender gangue, the strength first increases and then drops. The whole process has influence. (5) using the FLAC~ (3D) numerical simulation software and combining the geological and mining conditions of the 801 working face paste filling in Benxi color Tun mine, a numerical model is set up, the surface subsidence after the filling mining is simulated, the surface subsidence value of the working surface is obtained, and the simulation results and the measured results are compared and analyzed.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD823.7

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