煤田地质与勘探2017，Vol.45Issue(4)：31-37,43,8.DOI:10.3969/j.issn.1001-1986.2017.04.006
液态CO2相变致裂技术在布孔参数优化中的应用
Optimization of borehole layout parameters based on fracturing technology of liquid CO2 phase
摘要
Abstract
In order to achieve the purposes of economical-effectively eliminating coal and gas outburst in low permeability coal seam areas through fracturing technology of liquid CO2 phase,the paper carried out through-layer gas pre-drainage test using fracturing technology of liquid CO2 phase in Pingdingshan No.13 mine,on the basis of study of the fracturing radius of influence,through numerical simulation and field verification,the borehole layout parameters for fracturing technology of liquid CO2 phase were studied.Through simulation and test with different layout and spacing of boreholes,the results showed that first fractur borehole provided the free surface for the the latter fractured borehole so as to make the fracturing developed towards the direction of the free surface,when regional fracturing was taken,it was easy to reduce the unfavorable influence of the free surface through using quincunx layout of the low linearity,the best borehole spacing was 0.5 to 0.6 times the effective influencing radius of fracturing.关键词
液态CO2/影响半径/布孔方式/参数优化/数值模拟Key words
liquid CO2/effective radius/borehole/parameter optimization/simulation分类
矿业与冶金引用本文复制引用
李豪君,王兆丰,陈喜恩,赵龙,周大超..液态CO2相变致裂技术在布孔参数优化中的应用[J].煤田地质与勘探,2017,45(4):31-37,43,8.基金项目
国家自然科学基金项目(51275061)National Natural Science Foundation of China(51275061) （51275061）
