采空区瓦斯流场区域划分研究
发布时间：2019-05-11 16:05
【摘要】：瓦斯事故的突发性、不确定性严重影响了煤矿的安全生产，经过调研得知，采空区是唯一能够存储大量游离态瓦斯的区域，是瓦斯灾害隐患的重要区域之一，因此掌握采空区瓦斯区域分布规律，对于有效的防控瓦斯灾害和瓦斯高效利用有重要的理论和现实意义。本文依托河北省科技支撑项目“煤矿采空区瓦斯爆炸地点的预测预报研究”、汾西矿务局重大技术攻关项目“煤炭自燃发火标志性气体实验研究”和“工作面瓦斯煤炭自燃综合治理技术开发”，运用瓦斯爆炸理论、矿压理论、矿井通风理论、瓦斯渗流扩散理论及相似原理，对采空区瓦斯流场及其分布规律进行研究。 在实验室采用自制的采空区流场试验台，以烟气作为示踪气体模拟采空区瓦斯流场的运移规律和浓度梯度分布规律；采用自制的瓦斯渗流扩散试验台，模拟瓦斯在采空区内渗流的速度；根据上述试验研究以及现实生产过程中采空区顶板垮落压实情况，将采空区瓦斯流场分为：“强流区”、“渗流区”和“非渗流区”三区。在生产过程中开采造成的岩层移动情况，即上覆岩层的跨落和地面的塌陷对采空区瓦斯流场的扰动和挤压，将会造成采空区的瓦斯流动，有可能产生爆炸。根据煤炭自燃引爆瓦斯的观点和“U”型发火区理论，，可以确定采空区“瓦斯易爆区”主要存在于采空区瓦斯“渗流区”的上下两巷的冒落带内。 在上述实验研究和理论分析的基础上，对汾西润泰井矿正明煤业有限公司0401工作面采空区瓦斯进行了现场实测。采用采空区布管和气相色谱仪检测各管路中抽出气体的成分以及所占比例的方法，根据检测到的CH4的浓度对采空区进行三区划分；根据检测到的烃类气体成分对采空区瓦斯易爆区域的位置进行确定，并对实验建立的瓦斯流场模型进行修正，印证了采空区瓦斯区域划分研究的科学性、合理性，从而为煤矿生产中采空区瓦斯灾害的防控工作和高效抽采提供了理论参考。
[Abstract]:The sudden occurrence and uncertainty of gas accident seriously affect the safety of coal mine production. Through investigation and investigation, it is found that goaf is the only area where a large amount of free gas can be stored, and it is one of the important areas of hidden danger of gas disaster. Therefore, mastering the regional distribution law of gas in goaf is of great theoretical and practical significance for the effective prevention and control of gas disasters and the efficient utilization of gas. Based on the science and technology support project of Hebei Province, this paper relies on the prediction and prediction of gas explosion site in goaf of coal mine. The major technical research projects of Fenxi Mining Bureau, "Experimental study on iconic Gas of Coal spontaneous Combustion" and "Development of Comprehensive Control Technology for spontaneous Combustion of Gas and Coal in working face", apply gas explosion theory, mine pressure theory and mine ventilation theory. The gas flow field and its distribution in goaf are studied by gas seepage diffusion theory and similarity principle. In the laboratory, a self-made goaf flow field test-bed was used to simulate the migration law and concentration gradient distribution of gas flow field in goaf by using flue gas as tracer gas. A self-made gas seepage diffusion test bed is used to simulate the seepage velocity of gas in goaf. According to the above experimental study and the compaction of roof in goaf, the gas flow field in goaf is divided into three areas: "strong current area", "seepage area" and "non-seepage area". The movement of rock strata caused by mining in the production process, that is, the disturbance and extrusion of gas flow field in goaf caused by the fall of overlying strata and the collapse of ground, will cause gas flow in goaf and may cause explosion. According to the viewpoint of spontaneous combustion of coal and the theory of "U" type firing area, it can be determined that the "gas explosive area" in goaf mainly exists in the caving zone of the upper and lower alleys in the "seepage area" of goaf. On the basis of the above experimental research and theoretical analysis, the field measurement of gas in goaf of 0401 working face of Fenxi Runtai Mine Zhengming Coal Industry Co., Ltd is carried out. The goaf is divided into three areas according to the concentration of CH4 by using the method of pipe arrangement in goaf and gas chromatograph to detect the composition and proportion of the extracted gas in each pipeline. According to the detected hydrocarbon gas composition, the position of gas explosive area in goaf is determined, and the gas flow field model established by experiment is modified, which proves that the research on gas division in goaf is scientific and reasonable. Therefore, it provides a theoretical reference for the prevention and control of gas disaster in goaf and high efficiency extraction in coal mine production.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712
本文编号：2474643
[Abstract]:The sudden occurrence and uncertainty of gas accident seriously affect the safety of coal mine production. Through investigation and investigation, it is found that goaf is the only area where a large amount of free gas can be stored, and it is one of the important areas of hidden danger of gas disaster. Therefore, mastering the regional distribution law of gas in goaf is of great theoretical and practical significance for the effective prevention and control of gas disasters and the efficient utilization of gas. Based on the science and technology support project of Hebei Province, this paper relies on the prediction and prediction of gas explosion site in goaf of coal mine. The major technical research projects of Fenxi Mining Bureau, "Experimental study on iconic Gas of Coal spontaneous Combustion" and "Development of Comprehensive Control Technology for spontaneous Combustion of Gas and Coal in working face", apply gas explosion theory, mine pressure theory and mine ventilation theory. The gas flow field and its distribution in goaf are studied by gas seepage diffusion theory and similarity principle. In the laboratory, a self-made goaf flow field test-bed was used to simulate the migration law and concentration gradient distribution of gas flow field in goaf by using flue gas as tracer gas. A self-made gas seepage diffusion test bed is used to simulate the seepage velocity of gas in goaf. According to the above experimental study and the compaction of roof in goaf, the gas flow field in goaf is divided into three areas: "strong current area", "seepage area" and "non-seepage area". The movement of rock strata caused by mining in the production process, that is, the disturbance and extrusion of gas flow field in goaf caused by the fall of overlying strata and the collapse of ground, will cause gas flow in goaf and may cause explosion. According to the viewpoint of spontaneous combustion of coal and the theory of "U" type firing area, it can be determined that the "gas explosive area" in goaf mainly exists in the caving zone of the upper and lower alleys in the "seepage area" of goaf. On the basis of the above experimental research and theoretical analysis, the field measurement of gas in goaf of 0401 working face of Fenxi Runtai Mine Zhengming Coal Industry Co., Ltd is carried out. The goaf is divided into three areas according to the concentration of CH4 by using the method of pipe arrangement in goaf and gas chromatograph to detect the composition and proportion of the extracted gas in each pipeline. According to the detected hydrocarbon gas composition, the position of gas explosive area in goaf is determined, and the gas flow field model established by experiment is modified, which proves that the research on gas division in goaf is scientific and reasonable. Therefore, it provides a theoretical reference for the prevention and control of gas disaster in goaf and high efficiency extraction in coal mine production.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712
【参考文献】
相关期刊论文 前10条
1 曹代勇,张守仁,任德贻;构造变形对煤化作用进程的影响——以大别造山带北麓地区石炭纪含煤岩系为例[J];地质论评;2002年03期
2 徐瑞龙,葛春波,刘亚俊,黄凤奇;无煤柱采场风流状态的物理模拟[J];煤炭工程师;1990年01期
3 刘金城;郭德勇;邹山旺;;大平煤矿瓦斯爆炸事故原因分析及对策[J];矿业安全与环保;2006年02期
4 杨永辰;刘富明;吕秀江;连英利;;铜川矿务局陈家山煤矿特大瓦斯爆炸事故的原因分析[J];矿业安全与环保;2007年05期
5 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
6 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
7 李宗翔,夏春林,纪传仁;任意采空区边界信息处理与有限元网格生成[J];辽宁工程技术大学学报;2004年03期
8 魏国营;姚念岗;;断层带煤体瓦斯地质特征与瓦斯突出的关联[J];辽宁工程技术大学学报(自然科学版);2012年05期
9 杨永辰;尹博;高永格;;综放面煤层自然发火区域划分的理论研究[J];河北工程大学学报(自然科学版);2009年04期
10 潘伟尔;;2005年我国煤矿安全生产评析[J];经济研究参考;2006年30期
相关博士学位论文 前1条
1 屈争辉;构造煤结构及其对瓦斯特性的控制机理研究[D];中国矿业大学;2010年
本文编号：2474643
本文链接：https://www.wllwen.com/kejilunwen/anquangongcheng/2474643.html
