晋平煤业低渗透煤层抽采钻孔参数数值模拟研究

发布时间：2018-02-01 14:41

本文关键词： 瓦斯抽采钻孔参数数值模拟结果分析应用技术　出处：《辽宁工程技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：采煤过程中的瓦斯问题一直困扰着煤矿的安全生产,因而对采煤过程中瓦斯问题的研究是保证煤矿安全生产的重要内容。煤层预抽这一措施是目前认为的对生产安全最有效的措施,如何提高抽采效率一直都是国内外研究的重点。本文首先从渗流理论、扩散理论、流体力学及计算流体力学进行了理论分析,其次根据实际情况做了假设条件和建立的模拟模型,最后针对回采工作面的顺煤层瓦斯抽放钻孔进行了数值模拟,分析了在抽放过程中不同参数对抽采效果的影响,给实际生产操作提供一定的理论参考。山西襄矿集团晋平煤业因为瓦斯问题使得生产受到了困扰,建立了瓦斯抽采系统。本文对晋平煤业3#煤层105、107工作面的抽采系统进行数据采集,建立了二维多孔介质模型,利用FLUETN进行了模拟研究。分析不同抽放孔径、不同抽采负压和不同煤层渗透率的情况下,钻孔抽采的影响范围。将模拟结果与现阶段的抽采效果进行比较,评价及优化抽采系统布孔的合理性,并对以后的抽采计划提供参考,增强生产的安全系数,给煤矿的安全生产提供更多的理论依据。
[Abstract]:The gas problem in coal mining process has been puzzling the safety of coal production. Therefore, the study of gas in coal mining process is an important content to ensure the safety of coal production. The measure of coal seam pre-drainage is considered to be the most effective measure for production safety. How to improve the extraction efficiency has always been the focus of domestic and foreign research. Firstly, the theoretical analysis of seepage theory, diffusion theory, hydrodynamics and computational fluid mechanics is carried out. Secondly, according to the actual situation, the hypothetical condition and the established simulation model are made. Finally, the numerical simulation is carried out for the gas drainage borehole in the coal seam of the mining face. This paper analyzes the influence of different parameters on the extraction effect in the process of drainage, which provides a certain theoretical reference for the actual production operation. Shanxi Xiang Coal Mine Group Jinping Coal Industry is troubled by the gas problem. The gas drainage system is established. In this paper, the data of extraction system of 105,107 coal face in Jinping Coal Industry is collected, and a two-dimensional porous medium model is established. The simulation study was carried out by using FLUETN. Under the conditions of different pumping aperture, different suction negative pressure and different permeability of coal seam. Compare the simulation results with the current extraction effect, evaluate and optimize the rationality of the drainage system, and provide a reference for the future extraction plan, enhance the safety factor of production. To provide more theoretical basis for coal mine safety production.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD712.6

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