摘要
为解决单一低透煤层瓦斯治理技术难题，构建了基于高压射流割缝的单一低透煤层瓦斯治理技术体系，分析了不同高压射流割缝方式的增透机制和适用条件，确定了割缝的合理高度、深度和出煤量，提出了可破除“孤岛效应”的网络化布孔方式。现场应用了割缝预抽煤巷条带煤层瓦斯技术、割缝预抽回采区域煤层瓦斯技术和割缝预抽石门揭煤区域煤层瓦斯技术，单孔瓦斯抽采影响半径增大2．0～4．3倍，预抽钻孔数量减少36％一44％，取得了显著的瓦斯治理效果。
In order to solve the gas control problem of single low permeability coal seam, single low permeability coal seam gas control tech nology system based on highpressure jet slotting was constructed.Permeability addition mechanisms and conditions of different highpres sure jet slotting mode was analyzed. Reasonable height, depth and coal output of slotted was determined. And networking arrangement of holes which can eradicate island effect was proposed.The technologies of slotted and prepumping gas in roadway strips, stoping area and crosscut region were applied in field.The results showed that gas drainage influence radius of single hole increased 2. 0-4.3 times and the number of holes decreased by 36%-44%.The effects of gas control was significant.
出处
《煤炭科学技术》
CAS
北大核心
2013年第9期53-57,共5页
Coal Science and Technology
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB201205)
国家自然科学基金资助项目(51074161)
"十二五"国家科技支撑计划资助项目(2012BAK04B07)
关键词
高压射流
单一低透煤层
割缝方式
出煤量
瓦斯抽采
ligh-pressure jet
single low permeability coal seam
slotted model
coal output
gas drainage
