点式气相聚能致裂增透技术试验研究  

Experimental study on fracturing and penetration enhancement technology by point-type gas-phase fusion

作　　者：吕锋鐄 Lv Fenghuang(Xigou Mine,Shanxi Xishan Jinxing Energy Corporation Ltd.,Lvliang 033602,China)

机构地区：[1]山西西山晋兴能源有限责任公司斜沟煤矿,山西吕梁033602

出　　处：《煤炭与化工》2021年第8期93-95,共3页Coal and Chemical Industry

基　　金：国家自然科学基金资助项目(51004062)。

摘　　要：液体CO2相变气爆属于点式气相聚能致裂增透技术,爆破后会对煤体产生三维效应,可作为判断煤层增透效果的依据。本文以设计的试验平台开展研究,获得气爆后压力下降的时空演化规律,随着逐渐远离起爆点,气体压力呈现二次抛物线规律,关系式为y=0.04x^(2)-5.86x+227.6,压力上升时间呈现幂函数规律,关系式为y=8.78x^(0.1437)。模拟结果表明,塑性区沿着爆破孔的轴向形成椭圆形分布,气爆后压力达到160 MPa和200 MPa时,最大爆破半径增大了20%,爆破体积增大了1倍。Liquid CO2 phase change gas explosion is a point-type gas-phase fracturing and penetration enhancement technology,which produces three-dimensional effect on coal body after blasting and can be used as a basis for judging the penetration enhancement effect of coal seam.In this paper,a study with a designed test platform was conducted to obtain the spatial and temporal evolution of the pressure drop after the gas explosion.The simulation results showed that the plastic zone formed an elliptical distribution along the axial direction of the blast hole,and the maximum blast radius increased by 20%and the blast volume doubled when the pressure reached 160 MPa and 200 MPa after gas explosion.

关 键 词：气相聚能 爆破半径 三维效应 增透 

分 类 号：TD712[矿业工程—矿井通风与安全]