本文選題：下組煤 + 底板破壞深度　； 參考：《華北科技學(xué)院》2017年碩士論文

【摘要】：我國煤炭資源儲量非常豐富,煤炭消費占我國一次能源消費總量的68%。隨著我國淺部煤炭資源的日益枯竭,礦井深度不斷延伸,下部煤層開采過程中受到底板奧陶系灰?guī)r水的威脅日益加大。因此,如何解決下部煤層的帶壓開采問題,對礦井安全生產(chǎn)有重要意義。由于趙莊礦上部煤炭資源已不足以維持礦井正常生產(chǎn)的需要,因此急需開采下組15#煤層,而15#煤層距底板奧灰含水層較近,局部地區(qū)不足20米,且奧灰水水壓較大。因此,本論文通過收集趙莊礦地質(zhì)及鉆孔資料,對下組15#煤層底板隔水層的厚度、空間展布特征及其隔水性能進行分析評價;利用FLAC-3D數(shù)值模擬軟件和經(jīng)驗公式,得出15#煤開采過程中的底板巖體破壞深度和奧灰承壓水的導(dǎo)升高度,并分析15#煤底板有效隔水層厚度及其空間展布特征;最后計算趙莊礦15#煤底板奧灰突水系數(shù),對下組15#煤帶壓開采條件進行評價。主要研究成果如下:(1)通過對奧灰?guī)r性及現(xiàn)場鉆孔資料進行分析,可知奧灰峰峰組頂部存在30m左右的相對隔水層;15#煤底板隔水層厚度在38.75~67.25m之間,平均厚度為57m,且隔水性能較好。(2)綜合FLAC-3D數(shù)值模擬和經(jīng)驗公式計算結(jié)果,得到15煤底板破壞深度為28m,奧灰承壓水導(dǎo)升高度為7m。15#煤底板有效隔水層厚度在25.32~75.3m之間。(3)15#煤底板奧灰突水系數(shù)sT在/1.0~003.0mMPa之間,因此,將整個井田劃分成兩個區(qū)域,即安全區(qū)(TmMPaS/06.0)、危險區(qū)(MPaTmMPamS/1.0/06.0)。
[Abstract]:China's coal reserves are very rich, coal consumption accounts for the total amount of primary energy consumption 68. With the depletion of shallow coal resources and the continuous extension of mine depth in China, the lower coal seam is threatened by the limestone water of Ordovician system in the process of mining. Therefore, how to solve the problem of pressure mining in the lower coal seam is of great significance to mine safety production. Because the coal resources of the upper part of Zhaozhuang Mine are not enough to maintain the normal production of the mine, it is urgent to mine the 15# coal seam of the lower formation, which is close to the Ordovician Aquifer on the floor, less than 20 meters in the local area, and the water pressure of the Ordovician ash is high. Therefore, by collecting geological and borehole data of Zhaozhuang Coal Mine, this paper analyzes and evaluates the thickness, spatial distribution characteristics and water insulation performance of the bottom water barrier layer of No. 15 coal seam in the lower formation, and makes use of FLAC-3D numerical simulation software and empirical formula. The failure depth of floor rock mass and the height of water conductivity of Ordovician confined water during coal mining of No. 15 # coal are obtained, and the thickness of effective water-insulating layer of coal floor and its spatial distribution characteristics are analyzed. Finally, the water inrush coefficient of Ordovician ash in 15# coal floor of Zhaozhuang Coal Mine is calculated. The pressure mining conditions of No. 15 # coal in the lower group were evaluated. The main research results are as follows: (1) by analyzing the characteristics of Ordovician limestone and site drilling data, it can be seen that there are about 30 m relative water-separating layer at the top of the Ordovician peak formation, and the thickness of the water-proof layer of coal floor No. 15 # is between 38.75 and 67.25 m. The average thickness is 57 m, and the water insulation is good. 2) the results of FLAC-3D numerical simulation and empirical formula are synthesized. It has been obtained that the failure depth of 15 coal floor is 28m, and the height of water conductivity of Ordovician confined pressure is between 25.32 ~ 75.3 m and 25.32 ~ 75.3m. The coefficient of water inrush of Ordovician ash of coal floor is between 1.0 and 0.03.0 mMPa. Therefore, the whole mine field is divided into two regions. That is, the safety zone is TmMPA S / 06.0, and the dangerous area is MPA TmMPam S / 1. 0 / 06.0.
【學(xué)位授予單位】：華北科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD823

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