多漏风综放工作面采空区风流规律研究
发布时间：2018-09-19 08:53
【摘要】：采空区漏风的危害很多，风流中携带一定量的氧气，能够促进遗煤的自燃，引发火灾；易产生瓦斯积聚，引发瓦斯灾害；使有效风流减少，这些无疑威胁着井下的安全生产及工人的生命安全。 本文将采空区简化为各向同性的多孔介质模型；然后根据流体力学理论，多孔介质流体力学理论及渗流力学等相关理论，运用fluent模拟软件对红庙矿三源两汇采空区漏风流场分布规律进行模拟并对采空区进行自燃“三带”划分，经判断得到采空区无遗煤自燃危险性，同时，对模拟结果进行比较，，得出多源多汇采空区在不同高度范围的“三带”分布，以及不仅采空区水平方向上可能具有遗煤自燃危险性，在一定的空间高度范围内也可能存在此种危险的特点。 通过改变模拟参数，对漏风流场进行预测分析研究，可以得到，漏风量的大小对采空区自燃“三带”有影响，且当漏风源和漏风汇位置和数目不变时，随着漏风量的增大，氧化带也随之变宽；在漏风量一定的情况下，漏风源或漏风汇的数目对采空区三带也有影响，漏风源或漏风汇距离工作面越远时，氧化带宽度越大。对进一步掌握采空区内存在遗煤自然氧化的区域及矿井自然火灾的防治具有重要意义。
[Abstract]:There are many hazards of air leakage in goaf, the air flow carries a certain amount of oxygen, can promote the spontaneous combustion of coal, cause fire, easy to produce gas accumulation, cause gas disaster, reduce the effective air flow, These undoubtedly threaten the safety of underground production and the safety of workers. In this paper, the goaf is simplified as an isotropic porous media model, and then according to the theory of fluid mechanics, the theory of fluid mechanics of porous media and the theory of seepage mechanics, etc. Using fluent simulation software, the distribution of air leakage field in the three sources and two sinks of Hongmiao Mine is simulated, and the "three zones" of spontaneous combustion of the goaf are divided, and the danger of coal spontaneous combustion in the goaf is obtained by judging. At the same time, the simulation results are compared. It is concluded that the distribution of "three zones" in different height ranges in the goaf with multiple sources and multiple sinks, and that there may not only be the danger of coal spontaneous combustion in the horizontal direction of the goaf, but also that such danger may exist in a certain space height range. By changing the simulation parameters and analyzing the air leakage field, it can be concluded that the magnitude of air leakage has an effect on the "three zones" of spontaneous combustion in goaf, and when the position and number of air leakage source and sink are constant, the air leakage increases with the increase of air leakage. At the same time, the number of air leakage source or air leakage sink also affects the third zone of goaf. The farther the air leakage source or sink is from the face, the wider the oxidation zone is. It is of great significance to further understand the natural oxidation of coal in the goaf and the prevention and control of the natural fire in the mine.
【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】：2013
【分类号】：TD75
本文编号：2249651
[Abstract]:There are many hazards of air leakage in goaf, the air flow carries a certain amount of oxygen, can promote the spontaneous combustion of coal, cause fire, easy to produce gas accumulation, cause gas disaster, reduce the effective air flow, These undoubtedly threaten the safety of underground production and the safety of workers. In this paper, the goaf is simplified as an isotropic porous media model, and then according to the theory of fluid mechanics, the theory of fluid mechanics of porous media and the theory of seepage mechanics, etc. Using fluent simulation software, the distribution of air leakage field in the three sources and two sinks of Hongmiao Mine is simulated, and the "three zones" of spontaneous combustion of the goaf are divided, and the danger of coal spontaneous combustion in the goaf is obtained by judging. At the same time, the simulation results are compared. It is concluded that the distribution of "three zones" in different height ranges in the goaf with multiple sources and multiple sinks, and that there may not only be the danger of coal spontaneous combustion in the horizontal direction of the goaf, but also that such danger may exist in a certain space height range. By changing the simulation parameters and analyzing the air leakage field, it can be concluded that the magnitude of air leakage has an effect on the "three zones" of spontaneous combustion in goaf, and when the position and number of air leakage source and sink are constant, the air leakage increases with the increase of air leakage. At the same time, the number of air leakage source or air leakage sink also affects the third zone of goaf. The farther the air leakage source or sink is from the face, the wider the oxidation zone is. It is of great significance to further understand the natural oxidation of coal in the goaf and the prevention and control of the natural fire in the mine.
【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】：2013
【分类号】：TD75
【参考文献】
相关期刊论文 前10条
1 王省身，陈全;综放采场自然发火规律研究[J];东北煤炭技术;1995年05期
2 储方健;凝胶防灭火技术在新集煤矿的应用[J];矿业安全与环保;2002年03期
3 朱华;采场空气流网的电模拟与数值模拟研究[J];阜新矿业学院学报;1983年03期
4 齐庆杰,冯圣洪,白福臣,黄伯轩;采场三维稳定渗流和瓦斯分布的数学模型及有限元解法[J];阜新矿业学院学报(自然科学版);1990年03期
5 刘剑,黄伯轩;用三维渗流分析采场气体流动状态[J];阜新矿业学院学报(自然科学版);1991年03期
6 齐庆杰,黄伯轩;用流场理论确定采空区火源点位置[J];工业安全与防尘;1997年09期
7 马成军;白利文;申立华;;采空区自燃“三带”分布规律及影响因素分析[J];华北科技学院学报;2008年01期
8 杜礼明,杨运良;采空区三维非稳定流场的数学模型及热力风压的计算[J];焦作工学院学报;1999年03期
9 郭嗣琮;不规则介质采场气体渗流问题的模糊数值解研究[J];科学技术与工程;2004年02期
10 李宗翔,孙广义,王继波;综放工作面煤柱内漏风与耗氧过程的数值模拟[J];力学与实践;2001年04期
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