摘要
为了研究抽采条件下采空区自燃规律,采用束管监测、数值分析的手段得出不同抽采负压条件下氧浓度的立体分布及等值线图。研究结果表明:随着抽采负压的增大,采空区自燃"三带"中,散热带与自燃带变宽,窒息带变窄,同时自燃带整体呈现向采空区深部运移的趋势;瓦斯浓度随着抽采负压增大呈下降的趋势;结合采空区自燃带与瓦斯浓度的变化趋势,得出合理的抽采负压范围为24～34kPa。
In order to study the law of spontaneous combustion in goaf under the condition of gas extraction,the method of beam tube monitoring and numerical analysis were adopted to obtain three-dimensional distribution and contour map of oxygen concentration under different gas drainage negative pressure.The results showed that with the increase of negative pressure,the heat dissipation zone and the spontaneous combustion zone of goaf became wider and the suffocation zone narrowed down.At the same time,the spontaneous combustion zone moved toward deep goaf as a whole,and the gas concentration had a decrease trend with the increase of gas drainage negative pressure.Combined with the change trend of spontaneous combustion zone and gas concentration,the optimal gas drainage negative pressure range was determined as 24～34 kPa.
作者
王月红
吴怡
张九零
Wang Yuehong;Wu Yi;Zhang Jiuling(College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei 063009,China;Key Laboratory of Mine Exploitation and Safety Technology in Hebei Province,Tangshan,Hebei 063009,China)
出处
《中国煤炭》
2018年第10期143-148,共6页
China Coal
基金
国家自然基金项目(51404086
51504077)
河北省自然科学基金资助项目(E2016209056)
关键词
瓦斯抽采
束管监测
自燃规律
抽采负压
gas drainage
beam tube monitoring
spontaneous combustion rule
gas drainage negative pressure
