【摘要】：以淮南礦業(yè)集團潘四東煤礦A組煤東一采區(qū)工程條件為背景,結(jié)合A3、A1煤賦存及開采布置特點,統(tǒng)計分析了 A3煤11113、11213、11313綜采工作面回采期間礦壓顯現(xiàn)特征。構(gòu)建了采區(qū)尺度的FLAC3D數(shù)值模擬模型,試驗分析獲得了 3個工作面回采期間圍巖應力分布特征及塑性破壞區(qū)范圍、區(qū)段煤及邊界煤柱對支承壓力分布的影響規(guī)律。綜合分析影響下分層工作面布置的因素,兼顧已采工作面和巷道的圍巖結(jié)構(gòu)影響和提高煤炭資源采出率的原則,提出了 11111工作面巷道布置方案,即11111工作面采用機巷內(nèi)錯于11113工作面機巷14m,風巷外錯55m,切眼內(nèi)錯15m。現(xiàn)場開展了 11111工作面礦壓觀測,獲得了工作面及巷道礦山壓力分布及顯現(xiàn)特征。巷道礦壓特征主要表現(xiàn)為:下分層回采巷道布置在實體煤下時,巷道受水平應力作用明顯,巷道圍巖變形破壞較為嚴重,風巷兩幫移近量明顯大于機巷;而位于采空區(qū)下方的機巷圍巖變形量較小。根據(jù)理論分析與計算綜合提出了下分層工作面(A1煤)11311工作面與11211工作面回采巷道布置方案及超前支護改進措施與礦壓控制對策。
[Abstract]:Based on the engineering conditions of Group A Coal East No. 1 Mining area of Pansidong Coal Mine of Huainan Mining Group, combined with the characteristics of occurrence and mining arrangement of A3A1coal, the characteristics of rock pressure behavior of A3 coal 11113CU 11213C11313 fully mechanized mining face during mining are analyzed statistically. The FLAC3D numerical simulation model of mining area scale is constructed, and the stress distribution characteristics of surrounding rock and the range of plastic failure zone during the mining period of three working faces are obtained, and the influence of coal and boundary coal pillar on the distribution of supporting pressure is obtained. Based on the comprehensive analysis of the factors affecting the layout of the stratified working face, taking into account the influence of the surrounding rock structure of the mining face and the roadway and the principle of improving the mining rate of coal resources, the roadway layout scheme of the 11111 working face is put forward. That is to say, the 11111 face adopts the machine roadway fault in the 11113 working face 14m, the wind roadway outside the fault 55m, the cutting hole internal error 15m. The mine pressure distribution and the characteristics of mine pressure in the face and roadway have been obtained by the observation of mine pressure in 11111 working face on the spot. The main characteristics of roadway pressure are as follows: when the lower stratified mining roadway is arranged under solid coal, the roadway is obviously affected by horizontal stress, the surrounding rock deformation of roadway is more serious, and the two sides of wind roadway are obviously larger than mechanical roadway; The surrounding rock deformation of the roadway located below the goaf is small. Based on theoretical analysis and calculation, this paper puts forward the layout scheme of mining roadway in 11311 and 11211 working face of lower stratified coal face (A1 coal), as well as the improvement measures of advance support and the countermeasures of controlling mine pressure.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD822.2

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