【摘要】：近年來,隨著煤礦開采量的增加,我國煤礦開采逐漸趨于深部開采,再加上我國煤層地質(zhì)條件的復(fù)雜性,造成了煤礦災(zāi)害事故的頻發(fā)。其中,瓦斯災(zāi)害占礦井災(zāi)害事故的絕大部分。因此,在煤礦生產(chǎn)過程中,瓦斯的有效治理、降低瓦斯?jié)舛仁翘岣叩V井安全高效生產(chǎn)的必要手段。 本文以潘一礦1551(1)工作面采空區(qū)為研究對象,對工作面瓦斯來源進(jìn)行了分析,其中采空區(qū)的瓦斯涌出量占回采面瓦斯涌出量的60%以上；因此,在煤層回采中有必要解決采空區(qū)瓦斯問題�，F(xiàn)如今解決采空區(qū)瓦斯的有效措施是進(jìn)行采空區(qū)瓦斯抽采。 根據(jù)潘一礦1551(1)工作面及其采空區(qū)的具體實(shí)際情況,并依據(jù)其煤層地質(zhì)條件及上覆煤巖物理特性,運(yùn)用FLAC3D軟件對采空區(qū)上覆巖層建立數(shù)值模型,通過運(yùn)算可以直觀地看出采空區(qū)上覆巖層的裂隙發(fā)育情況以及上覆巖層的應(yīng)力分布規(guī)律。通過對模擬結(jié)果分析,大致可以得出上覆巖層冒落帶和裂隙帶的范圍。結(jié)果顯示,模擬的結(jié)果和計(jì)算得出的冒落帶發(fā)育高度和裂隙帶發(fā)育高度大致相同。然后運(yùn)用Fluent軟件對采空區(qū)內(nèi)瓦斯僅在通風(fēng)條件下的運(yùn)移情況進(jìn)行模擬分析。得到沿工作面走向方向采空區(qū)瓦斯?jié)舛茸兓?guī)律及采空區(qū)豎直方向濃度的變化規(guī)律；同時(shí),得到漏風(fēng)對采空區(qū)瓦斯?jié)舛确植嫉挠绊憽?最后根據(jù)對采空區(qū)上覆巖層裂隙發(fā)育情況及采空區(qū)瓦斯分布規(guī)律的研究,確定采空區(qū)瓦斯的抽采方式及抽采鉆孔的布置。為采空區(qū)瓦斯的治理提供參考依據(jù)。
[Abstract]:In recent years, with the increase of coal mining, coal mining in our country gradually tends to deep mining, coupled with the complexity of the geological conditions of coal seam in China, resulting in the frequent occurrence of coal mine disasters. Among them, gas disaster accounts for the vast majority of mine disaster accidents. Therefore, in the process of coal mine production, the effective control of gas and the reduction of gas concentration are the necessary means to improve the safety and efficiency of mine production. Taking the goaf of 1551 (1) face in Panyi Coal Mine as the research object, this paper analyzes the gas source of the working face, in which the gas emission in the goaf accounts for more than 60% of the gas emission in the mining face; Therefore, it is necessary to solve the gas problem in goaf in coal seam recovery. Now the effective measure to solve goaf gas is to carry out goaf gas drainage. According to the actual situation of 1551 (1) working face and goaf of Panyi Coal Mine, and according to the geological conditions of coal seam and the physical characteristics of overlying coal and rock, the numerical model of overlying strata in goaf is established by using FLAC3D software. The development of cracks in overlying strata and the stress distribution of overlying strata can be seen intuitively through the calculation. Through the analysis of the simulation results, the scope of overlying strata fall zone and fracture zone can be roughly obtained. The results show that the simulated results are approximately the same as the calculated height of the development of the caving zone and that of the fissured zone. Then Fluent software is used to simulate and analyze the gas migration in goaf under ventilation condition. The variation law of gas concentration in goaf along the strike direction of working face and vertical concentration in goaf are obtained, and the influence of air leakage on gas concentration distribution in goaf is also obtained. Finally, according to the research on the development of the cracks in the overlying strata of goaf and the gas distribution in the goaf, the way of gas extraction and the arrangement of drilling holes in goaf are determined. It provides reference basis for gas control in goaf.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TD712.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 文潔,黃克智,黃永剛;多孔材料剪切局部化中的尺寸效應(yīng)[J];工程力學(xué);2005年05期

2 江成玉;劉勇;李春輝;;采煤工作面上隅角瓦斯積聚原因分析及治理措施[J];潔凈煤技術(shù);2010年06期

3 李誠玉;周西華;張麗麗;李昕;;采空區(qū)瓦斯運(yùn)移的數(shù)學(xué)模型[J];礦業(yè)快報(bào);2007年08期

4 張永,徐坤,李元章,張連福;高位鉆孔抽放瓦斯技術(shù)[J];煤礦安全;2002年03期

5 時(shí)國慶;王德明;奚志林;鄧小林;;基于FLUENT對采空區(qū)氧氣濃度場的數(shù)值模擬[J];煤炭科學(xué)技術(shù);2009年06期

6 徐超;劉輝輝;鄒偉;;淺談我國煤礦瓦斯抽放技術(shù)[J];山東煤炭科技;2010年02期

7 李宗翔,海國治,秦書玉;采空區(qū)風(fēng)流移動規(guī)律的數(shù)值模擬與可視化顯示[J];煤炭學(xué)報(bào);2001年01期

8 賀廣零;黎都春;翟志文;唐光寅;;采空區(qū)煤柱-頂板系統(tǒng)失穩(wěn)的力學(xué)分析[J];煤炭學(xué)報(bào);2007年09期

9 吳洪詞;長壁工作面基礎(chǔ)板結(jié)構(gòu)模型及其來壓規(guī)律[J];煤炭學(xué)報(bào);1997年03期

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