群力矿煤与瓦斯突出灾变时期通风系统紊乱研究
发布时间：2018-11-24 11:25
【摘要】：本文以有源风网理论为基础，研究煤与瓦斯突出灾变时期，突出气体在矿井巷道内的运移规律以及突出气体对整个矿井通风系统的影响。使用MATLAB编写的专门针对灾变时期通风系统研究的TF1M程序软件为分析工具，模拟了群力矿煤与瓦斯突出的动态过程。 采用有源风网描述含突出瓦斯的通风系统，构造了煤与瓦斯突出源模型；突出瓦斯在巷道中的扩散运移规律采用一维有限元方法求解；采用特征线法求解了突出事发巷道中的瓦斯动力非稳定过程，最终建立非稳定条件下通风网络及瓦斯分布解算模型。发生煤与瓦斯突出，通风系统大致经历三个过程突出动力过程、自然流动过程、恢复通风过程。突出发生后，瓦斯在突出源动力作用下灌入主通风巷道，，导致进风巷道发生瓦斯逆流；突出释放的瓦斯在矿井内流动和扩散，导致矿井通风系统内各个巷道的瓦斯分布不均，产生瓦斯自然风压；受到瓦斯自然风压的影响，在矿井局部回路中发生风流逆转的风流紊乱现象，同时会扩大瓦斯的波及的范围。
[Abstract]:Based on the theory of active air network, this paper studies the migration law of outburst gas in mine roadway and the influence of outburst gas on the whole mine ventilation system during coal and gas outburst disaster period. The dynamic process of coal and gas outburst in group coal mine is simulated by using TF1M program software written by MATLAB for the study of ventilation system during catastrophic period as an analysis tool. The active wind net is used to describe the ventilation system with outburst gas, and the coal and gas outburst source model is constructed, and the diffusion and migration law of outburst gas in the roadway is solved by one-dimensional finite element method. The method of characteristic line is used to solve the gas dynamic instability process in outburst roadway. Finally, the ventilation network and gas distribution model under unstable conditions are established. When coal and gas outburst occurs, ventilation system goes through three processes: outburst dynamic process, natural flow process and recovery ventilation process. After outburst, gas is poured into the main ventilation roadway under the action of outburst source power, which leads to the gas countercurrent in the air entry roadway. The gas released by outburst flows and diffuses in the mine, which leads to the uneven distribution of gas in each roadway in the mine ventilation system, resulting in the natural air pressure of gas. Under the influence of natural gas wind pressure, the phenomenon of air flow reversal occurs in the local loop of mine, and the scope of gas sweep will be enlarged at the same time.
【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】：TD713;TD724
本文编号：2353519
[Abstract]:Based on the theory of active air network, this paper studies the migration law of outburst gas in mine roadway and the influence of outburst gas on the whole mine ventilation system during coal and gas outburst disaster period. The dynamic process of coal and gas outburst in group coal mine is simulated by using TF1M program software written by MATLAB for the study of ventilation system during catastrophic period as an analysis tool. The active wind net is used to describe the ventilation system with outburst gas, and the coal and gas outburst source model is constructed, and the diffusion and migration law of outburst gas in the roadway is solved by one-dimensional finite element method. The method of characteristic line is used to solve the gas dynamic instability process in outburst roadway. Finally, the ventilation network and gas distribution model under unstable conditions are established. When coal and gas outburst occurs, ventilation system goes through three processes: outburst dynamic process, natural flow process and recovery ventilation process. After outburst, gas is poured into the main ventilation roadway under the action of outburst source power, which leads to the gas countercurrent in the air entry roadway. The gas released by outburst flows and diffuses in the mine, which leads to the uneven distribution of gas in each roadway in the mine ventilation system, resulting in the natural air pressure of gas. Under the influence of natural gas wind pressure, the phenomenon of air flow reversal occurs in the local loop of mine, and the scope of gas sweep will be enlarged at the same time.
【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】：TD713;TD724
【参考文献】
相关期刊论文 前10条
1 李宗翔;王德民;温永宇;;矿井3D风网图及基于MATLAB仿真编程实现[J];安全与环境学报;2010年06期
2 黄双杰,马心校,蔡樱;突出瓦斯对通风系统影响的计算[J];矿业安全与环保;2000年02期
3 高运增;周心权;王润华;;煤矿井下爆炸烟气动态稀释规律研究[J];矿业安全与环保;2006年02期
4 张仁松,唐继东;矿井瓦斯对风流稳定性影响的探讨[J];煤炭工程师;1997年05期
5 余楚新,鲜学福,谭学术;煤层瓦斯流动理论及渗流控制方程的研究[J];重庆大学学报(自然科学版);1989年05期
6 程卫民;王刚;周刚;陈连军;;煤与瓦斯突出后对防突风门破坏的数值模拟[J];重庆大学学报;2009年03期
7 高建良;罗娣;;巷道风流中瓦斯逆流现象的数值模拟[J];重庆大学学报;2009年03期
8 王树刚,王继仁,桂祥友;矿内空气非定常流动规律研究[J];辽宁工程技术大学学报(自然科学版);1998年04期
9 李宗翔;刘宇;于景晓;贾进章;;突出瓦斯流与矿井通风系统耦合移动仿真[J];重庆大学学报;2012年11期
10 丁晓良,俞善炳,丁雁生,寇绍全,谈庆明,郑哲敏;煤在瓦斯渗流作用下持续破坏的机制[J];中国科学(A辑 数学 物理学 天文学 技术科学);1989年06期
相关博士学位论文 前1条
1 杨守国;煤与瓦斯突出判识及灾害气体运移规律研究[D];重庆大学;2011年
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