摘要
用有限元数值模拟方法,结合图形显示技术,对大隆煤矿综采工作面采空区瓦斯抽放问题进行了计算分析。从理论上模拟了冒落非均质回采采空区内回风隅角处的瓦斯聚积过程。直观展示了瓦斯抽放时采空区流态、瓦斯分布变化的流体力学原理。模型中采空区流态计算用非均质渗流方程,瓦斯扩散运移基于瓦斯与大气两相混溶流方程描述。计算考虑了采空区沿边界冒落非充分压实的情况。利用数值模拟试验方法给出了合理的抽放流量和工作面通风量。
Basing on finite element method and visual display technology, this paper analyses the gas drainage problem of goal in Dalong mine. It is simulated theoretically that the gas collection course in the falling porous media of heterogeneous at the upper corner of goal, showing immediately the mechanics of porous flow principle of the flow pattern in goal and gas distribution movement when gas is being drained. The goaf flow pattern is calculated based on air leakage seepage equation of heterogeneous porous media, and gas transfer diffuse equations are recounted based on the binary mixture equation of gas - air, and it is fully considered that the heterogeneous feather of boundary caving has a certain influence in the calculation. Using finite element method, the justified drainage - flux and ventilation - flux of working face are concluded.
出处
《矿业研究与开发》
CAS
北大核心
2006年第1期74-77,共4页
Mining Research and Development
关键词
非均质采空区
回风隅角
瓦斯抽放
数值模拟
Inhomogeneous goaf, Air return corner, Gas drainage, Numerical simulation
