长春兴煤矿大采高综放工作面初采阶段矿压显现规律及面长优化

发布时间：2018-03-25 13:30

本文选题：大采高综放开采　切入点：初采矿压规律　出处：《山东科技大学》2017年硕士论文

【摘要】：工作面倾斜长度(面长)是制约综放开采高产、高效生产的重要因素。目前对于大采高综放开采,从初采期间的矿压显现规律角度对工作面面长的研究较少。本文依据长春兴煤矿4个不同面长工作面的地质资料、顶板压力实测值,分析工作面在不同面长情况下基本顶的初次来压时的支架循环末阻力、动载系数、宏观矿压显现程度。发现不同面长情况下矿压显现存在的问题,并通过实测数据分析了面长的合理范围为140-230m。基于301工作面基本地质条件和矿压监测数据,建立顶板结构模型,分析其顶板运动形式,为采场顶板的矿压规律分析和数值模拟的研究提供理论基础。运用FLAC3D数值模拟软件对不同面长工作面在不同推进度下的顶板下沉量及工作面前方超前支承压力进行模拟。利用给定支承压力下顶板下沉量作为一个重要指标来判别工作面支架的控顶效果,依此来研究顶板特定荷载下的工作面合理面长范围为140-200m;从综放工作面超前支承压力对顶煤破碎程度的影响角度,由模拟的不同面长工作面超前支承压力的变化分析,工作面面长应大于200m。依据板式断裂理论、砌体梁理论,利用边长系数法,结合工作面支架的支护强度,计算在不超过支架额定工作阻力的情况下工作面面长范围为小于198.5m。综合初采期间矿压显现规律、数值模拟及理论研究,根据长春兴煤矿现有支架的承载能力,最终确定该矿工作面在特定荷载情况下实现高产、高效的最优工作面长度为200m。
[Abstract]:Working face length (long) is restricting the fully mechanized top coal caving mining in high yield, high production. The important factors for mining mining, from the initial mining period of the GroundPressure of perspective on the working face of the less. On the basis of geological data Changchun Xing coal 4 different length of working face the roof pressure, the measured value, the initial analysis of working face in different length cases of basic roof to pressure the bracket at the end of cycle resistance, dynamic load coefficient, pressure degree of macro mine. Show the problems found under different pressure surface mine, and through the analysis of measured data of the reasonable range for face length 140-230m. pressure monitoring data of the basic geological conditions of 301 working face and mine based on building roof structural model, analysis of the movement of the roof form, provide a theoretical basis for the study of the mine stope roof analysis and numerical simulation of pressure by using FLAC3D numerical simulation software. The roof for each face long working face in different progress under subsidence and advance support pressure was simulated. The effect of roof by using the given support under the pressure of roof subsidence is an important index to judge the face support control, according to research on the reasonable working face roof under specific load surface the range of 140-200m; from the fully mechanized caving face abutment pressure on top coal crushing degree of impact angle, analysis of the changes of advanced supporting pressure from the simulation of different surface long working face, working face length should be greater than 200m. on the basis of plate fracture theory, masonry beam theory, using the length coefficient method, combined with the working face support bracket support strength calculation work in not to exceed the rated working resistance of support under the condition of surface long range is less than 198.5m. during the initial mining GroundPressure of numerical simulation, research and theory, according to the Changchun Xing coal mine now With the bearing capacity of the support, it is determined that the working face of the mine can achieve high yield under specific load, and the optimum working face length is 200m..

【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD323

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