本文選題：采空區(qū) + 瓦斯封存量��； 參考：《青島理工大學(xué)》2013年碩士論文

【摘要】：CH_4是第二大溫室氣體，煤炭開發(fā)中的瓦斯涌出是大氣中CH_4的重要來源之一，煤炭開發(fā)過程中的碳排放日益引起人們的關(guān)注。采空區(qū)中封存著大量的瓦斯，計(jì)算采空區(qū)中的封存瓦斯量有助于碳排放量的準(zhǔn)確計(jì)算，并為制訂節(jié)能減排措施提供依據(jù)。采空區(qū)封存瓦斯量主要受采空區(qū)空間體積和采空區(qū)瓦斯?jié)舛确植純煞矫娴囊蛩赜绊�。而采空區(qū)空間體積由采空區(qū)上覆巖層的垮落特征決定的；采空區(qū)瓦斯?jié)舛确植际怯刹煽諈^(qū)的瓦斯運(yùn)移特征決定的。本論文在對曉明煤礦的上覆巖石參數(shù)和采空區(qū)的瓦斯?jié)舛冗M(jìn)行了實(shí)際測定的基礎(chǔ)上，運(yùn)用RFPA2D軟件對采空區(qū)上覆巖層的垮落過程進(jìn)行了模擬，運(yùn)用FLUENT軟件對采空區(qū)瓦斯?jié)舛葓鲞M(jìn)行了模擬，，借助巖體力學(xué)、巖層與地表移動、礦井瓦斯涌出量預(yù)測等相關(guān)基礎(chǔ)理論推導(dǎo)出了采空區(qū)瓦斯封存量的計(jì)算公式，并進(jìn)行了實(shí)際計(jì)算和驗(yàn)證。本論文主要有以下幾個方面的內(nèi)容： （1）本論文梳理了豎向冒落帶、裂隙帶、彎曲下沉帶，橫向自然堆積區(qū)、承壓穩(wěn)定區(qū)、壓實(shí)穩(wěn)定區(qū)的特征，調(diào)研分析了曉明煤礦和大興煤礦的實(shí)際“三帶”觀測資料，對曉明煤礦上覆巖層的物理參數(shù)進(jìn)行了測定，運(yùn)用RFPA~(2D)軟件對曉明煤礦N_2413回采工作面采空區(qū)的上覆巖層垮落過程進(jìn)行了模擬，得到了采空區(qū)橫豎三區(qū)（帶）的特征、范圍規(guī)律。 （2）系統(tǒng)地分析了采空區(qū)瓦斯的來源，引入多孔介質(zhì)的概念，并以流體的連續(xù)性方程、運(yùn)動方程、動量方程為基礎(chǔ)，列出了采空區(qū)瓦斯?jié)B流的數(shù)學(xué)模型，并給出了三類邊界條件。對曉明煤礦的N_2413回采工作面采空區(qū)瓦斯?jié)舛确植家?guī)律進(jìn)行了實(shí)際測量，運(yùn)用FLUENT軟件模擬了曉明煤礦N_2413回采工作面采空區(qū)瓦斯?jié)舛葓�，得出了采空區(qū)的瓦斯?jié)舛葓觥?（3）以采空區(qū)的上覆巖層垮落特征和采空區(qū)瓦斯?jié)舛葓鎏卣鳛榛A(chǔ)，提出了采空區(qū)瓦斯封存量計(jì)算模型，對計(jì)算公式進(jìn)行了推導(dǎo)。 （4）以鐵法礦區(qū)曉明煤礦N_2413回采工作面的具體條件為背景計(jì)算出了現(xiàn)有采空區(qū)的封存瓦斯量，并對公式的計(jì)算準(zhǔn)確性進(jìn)行了驗(yàn)證。
[Abstract]:CH_4 is the second largest greenhouse gas, and the gas emission from coal development is one of the important sources of CH_4 in the atmosphere. There is a large amount of gas in the goaf. The calculation of the gas sequestration in the goaf is helpful to the accurate calculation of carbon emissions and provides the basis for the formulation of energy saving and emission reduction measures. The amount of gas sealed in goaf is mainly affected by the space volume of goaf and the distribution of gas concentration in goaf. The space volume of the goaf is determined by the collapse characteristics of the overlying strata in the goaf, and the gas concentration distribution in the goaf is determined by the gas migration characteristics of the goaf. Based on the actual measurement of the overlying rock parameters and the gas concentration in the goaf of Xiaoming Coal Mine, the collapse process of the overlying strata in the goaf is simulated by using RFPA2D software. The gas concentration field in goaf is simulated by FLUENT software. Based on the basic theories of rock mass mechanics, rock strata and surface movement, and gas emission prediction in coal mine, the calculation formula of gas sealing capacity in goaf is deduced. The actual calculation and verification are carried out. The main contents of this thesis are as follows: 1) in this paper, the characteristics of vertical caving zone, fracture zone, bending and sinking zone, transverse natural accumulation area, pressure stable zone and compaction stability zone are combed, and the actual "three zones" observation data of Xiaoming Coal Mine and Daxing Coal Mine are investigated and analyzed. The physical parameters of overlying strata in Xiaoming Coal Mine are measured, and the overlying strata collapse process in the goaf of N2413 stoping face of Xiaoming Coal Mine is simulated by using RFPA-2D software, and the characteristics and range of the three areas (zones) of goaf are obtained. The source of gas in goaf is analyzed systematically, the concept of porous medium is introduced, and based on the continuity equation, motion equation and momentum equation of fluid, the mathematical model of gas seepage in goaf is listed, and three kinds of boundary conditions are given. The distribution law of gas concentration in goaf of Nji 2413 mining face in Xiaoming coal mine is measured in practice. The gas concentration field in goaf of N2413 mining face of Xiaoming coal mine is simulated by FLUENT software, and the gas concentration field of goaf is obtained. Based on the characteristics of overlying rock strata and gas concentration field in goaf, a calculation model of gas storage in goaf is put forward, and the calculation formula is deduced. (4) based on the concrete conditions of NSP 2413 mining face in Xiaoming Coal Mine of Tiefa Mining area, the amount of gas sealed in the existing goaf is calculated, and the calculation accuracy of the formula is verified.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712

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