本文選題：高抽巷　切入點：裂隙發(fā)育　出處：《中國礦業(yè)大學》2014年碩士論文　論文類型：學位論文

【摘要】：隨著礦井開采向深部延伸，瓦斯含量和瓦斯壓力越來越大，瓦斯制約生產(chǎn)的“瓶頸”問題也越來越突出，放頂煤的高強度開采使得工作面上隅角及回風巷內(nèi)瓦斯屢屢超限，嚴重影響正常生產(chǎn)并對人員和設備安全造成巨大威脅。因此，從設計源頭上解決瓦斯制約生產(chǎn)的問題是實現(xiàn)綜放開采安全高效生產(chǎn)的關鍵。潞安礦區(qū)應用高抽巷較少，在目前通風抽采方式不能夠解決瓦斯超限的情況下，，對高瓦斯綜放面走向高抽巷布置及抽采技術進行系統(tǒng)研究十分必要，可為潞安礦區(qū)的深部高瓦斯煤層安全高效開采提供一條新的思路。 本文首先對五陽煤礦7605綜放面瓦斯涌出特征、來源與構成和采空區(qū)瓦斯運移規(guī)律進行分析，發(fā)現(xiàn)在使用回風巷鉆場鉆孔抽采技術的基礎上，采空區(qū)瓦斯涌出仍然是工作面瓦斯涌出的主要原因，故提出更加穩(wěn)定的走向高抽巷抽采技術來治理相鄰7603綜放面采空區(qū)瓦斯涌出。結合五陽煤礦3#煤層上覆巖層的巖性特征，通過理論計算及數(shù)值模擬分析得到綜放面冒落帶和裂隙帶高度，以及橫三帶的相關參數(shù)。建立采空區(qū)幾何模型，通過FLUENT數(shù)值模擬研究了高抽巷在不同平距和垂距參數(shù)條件下的抽采效果，得出最優(yōu)的高抽巷空間布置位置。對高抽巷受采動影響的破壞規(guī)律進行理論及數(shù)值模擬分析，得出高抽巷的主要變形破壞特征為底臌，為了保證高抽巷的正常使用，采取打底板錨桿對底板進行加固。通過理論及數(shù)值模擬分析，確定高抽巷長度、斷面、抽采負壓、抽采管路、抽采設備、密封措施等高效抽采系統(tǒng)參數(shù)。在五陽煤礦7603綜放面應用走向高抽巷，從現(xiàn)場監(jiān)測結果可以發(fā)現(xiàn)，合理布置的高抽巷可以抽采鄰近層及圍巖涌入采空區(qū)的大量瓦斯，使綜放面實現(xiàn)安全開采。
[Abstract]:As the mining extends to the deep, the gas content and the gas pressure are more and more big, the "bottleneck" problem of the gas restriction production is more and more prominent, the high intensity mining of top coal caving makes the gas in the upper corner of the face and in the return air roadway often exceed the limit. It seriously affects the normal production and poses a great threat to the safety of personnel and equipment. Therefore, it is the key to realize the safe and efficient production of fully mechanized caving mining to solve the problem of restricting the production of gas from the design source, and the application of high drainage roadway is less in Lu'an mining area. Under the condition that the ventilation and mining method can not solve the problem of gas exceeding limit, it is necessary to study systematically the layout of high drainage roadway and the drainage technology of high gas fully mechanized caving face. It can provide a new idea for safe and efficient mining of deep high gas coal seam in Lu'an mining area. In this paper, the characteristics of gas emission from 7605 fully mechanized caving face in Wuyang Coal Mine, the origin and composition of gas emission, and the law of gas migration in goaf are analyzed. Gas emission from goaf is still the main reason of gas emission in coal face, so a more stable technology of high drainage roadway is put forward to control gas emission in goaf of adjacent 7603 fully mechanized caving face. Combined with lithologic characteristics of overlying strata on coal seam of Wuyang coal mine, Through theoretical calculation and numerical simulation analysis, the height of caving zone and fracture zone of fully mechanized caving face and the relative parameters of transverse third zone are obtained. The geometric model of goaf is established. Through FLUENT numerical simulation, the extraction effect of high extraction roadway under different horizontal distance and vertical distance parameters is studied, and the optimal spatial location of high extraction roadway is obtained. The theory and numerical simulation analysis are carried out on the failure law of high extraction roadway affected by mining movement. It is concluded that the main deformation and failure characteristics of high drawing roadway are floor heave. In order to ensure the normal use of high pumping roadway, the bottom slab anchor rod is adopted to reinforce the bottom slab. Through theoretical and numerical simulation analysis, the length, section and negative pressure of high drawing roadway are determined. High efficiency extraction system parameters, such as extraction pipeline, extraction equipment, sealing measures, etc., are used in 7603 fully mechanized caving face of Wuyang Coal Mine towards high pumping roadway. It can be found from the monitoring results on the spot, The reasonably arranged high drainage roadway can extract a large amount of gas from adjacent strata and surrounding rock to the goaf, so that the fully mechanized caving face can be safely mined.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TD712.6

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