Study of the Influence of Permeability Variation on Methane Emission around a Developing Roadway

摘要：

Coal seam permeability has a great influence on the methane emission rate. The variation of stress distribution around a developing roadway causes the change of coal seam permeability when the roadway is driven. The finite difference method is applied to simulate the methane flow in coal seam around a driving roadway and the influence of permeability variation on methane pressure distribution and methane emission rate is studied. It is revealed that the permeability variation caused by re-distribution of stress around a roadway greatly affects the methane flow in coal seam and the influence varies with the increase of exposure time of coal wall. Therefore, the variation of permeability caused by movement of strata around a driving roadway must be taken into consideration when the methane emission into roadway is calculated.

关键词： developing roadway permeability numerical simulation methane emission methane pressure

作者: GAO Jianliang HOU Sanzhong XU Kunlun ZHANG Xuebo

作者单位: School of Safety Science & Engineering , Henan Polytechnic University , Jiaozuo ,454003 , Henan,China

会议类型: 国际会议

会议名称: The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)

会议地点: 河南焦作

会议语种:英文

页码: 1599-1604

在线出版日期: 2007-04-17（万方平台首次上网日期，不代表论文的发表时间）