摘要
通过对比研究淮南矿业集团各矿区试验钻孔抽采数据,在明确地面钻孔抽采瓦斯机理的基础上,运用理论分析及数值模拟的手段,分析总结了地面钻孔抽采采空区瓦斯效率的影响因素,并针对具体影响因素提出了提高钻孔抽采效率的相关建议.研究结果表明：地面钻孔抽采效率影响因素可以分为自然客观因素和钻孔施工参数两大类.加强采空区漏风控制,把地面钻孔布置在靠近回风巷一侧,抽采负压控制在40-60 kPa之间,钻孔间距保持在200-300 m,管道内气体流速在10 m^3/s左右有利于提高钻孔抽放效率.
Based on the mechanism of gas extraction technology with surface goal hole, analyzed field data about boreholes in Huainan Mining （Group） Co. Ltd. With the method of numerical simulation and theory conclusion, concluded the influencing factors to extraction efficiency of surface goal hole. Besides, provided some advices on promoting the working efficiency of borehole in the end. Research results indicate that factors influencing the extraction efficiency of hole can be reduced to two types such like nature and parameter generally. Such measures like reducing air-leak in goaf, disposing hole near to return airway, controlling extracting pressure to range from 40 to 60 kPa and space between holes 200 to 300 m and so on are useful to promote the efficiency of surface borehole.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第7期942-946,共5页
Journal of China Coal Society
基金
国家自然科学基金重点资助项目(50534080)
"十一五"国家科技攻关资助项目(2006BAK03B03)
大型油气田及煤层气开发科技重大专项资助项目(2008ZX05000-041)
关键词
地面钻孔
采空区瓦斯
抽采
自然因素
参数因素
surface borehole
gas extraction in goal
efficiency of borehole
nature factor
parameter factor
