综放工作面瓦斯来源及分布规律研究

Study on Gas Resources and Gas Distribution at Fully Mechanized Coal Mining Face

基于瓦斯运移基础理论,采用单元法把工作面沿倾向分为若干单元,现场实测了N2105采煤工作面每个单元的瓦斯浓度、风量、断面面积等参数。通过对N2105采煤工作面实测数据分析,确定了采空区、煤壁及落煤瓦斯涌出量在整个单元体所占比例。从工作面每个单元瓦斯浓度实测结果发现,沿走向从煤壁至采空区,瓦斯呈现"马鞍"形分布;而沿采煤工作面倾向上,瓦斯浓度呈增大趋势。

Based on the basic theory of the gas migration, using the element method to working face along the tendency is divided into several units. Field measured the mining face N2105 each unit parameters such as gas concentration, air volume, the cross section area. Through the work of the N2105 coal mining face data analysis, to determine the goaf, the wall and the fall of coal gas emission quantity accounts for the proportion in the whole unit. From the working face gas concentration of the measured results show that each unit along the strike from coal wall to goaf, gases present 'saddle' shape distribution. While the coal mining face along dip, the gas concentration increases.