摘要
研究了穿层钻孔孔群增透的作用原理,阐述了突出煤层穿层钻孔孔群增透技术及工艺。研究表明,在突出煤层采取穿层钻孔孔群增透瓦斯抽采技术,利用煤体的"自突"特性排出煤体,孔群范围剩余煤体卸压、膨胀变形,裂隙系统扩展、贯通,透气性平均提高150倍,单孔平均瓦斯流量提高4倍,显著提高瓦斯抽采效率。
A new permeability improvement technology of array crossing boreholes was described and studied in detail,and the permeability improvement mechanism was put forward and analyzed.The in-situ experimental results show that the technology can eject coal from outburst seam,lead the remainder ones to loose pressure and extend fracture,and improve the coal permeability by an average of 150 times and the borehole flow by an average of 4 times.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第9期1515-1518,共4页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2011CB201204)
国家自然科学基金面上资助项目(51074160)
中央高校基本科研业务费专项资金资助项目(2010QNA03)
关键词
突出煤层
穿层钻孔
孔群
增透
outburst coal seam
crossing borehole
array boreholes
permeability improvement
