Application of liquid CO2 fracturing technique in rock burst control
ZHANG Hongwei
ZHU Feng
LI Yunpeng
ZHANG Bailin
CHEN Ying
ZHANG Zhigang
Abstract：In order to solve the problem of rock burst in conventional controlling measures,this paper studied the impact of new technology,pressure treatment liquid CO2 fracturing system.This paper introduced the working principle of liquid CO2 fracturing technology,test the conversion rate of pressure by independent development equipment in the laboratory,and test the relationship between the blasting pressure and the different spacing of hole wall and discharge head.According to the results,industrial experiment is carried out in the field.The results indicates that liquid CO2 fracturing can be no fire and used repeatedly,it is a new type of safe and efficient controlling measure.The smaller the spacing between hole wall and discharge head,the more pressure on the hole wall.When the spacing is from 10 mm to 21 mm,the conversion rate of pressure is 70％ ～ 82％.The pressure of sealing increased by 52.3％ compared with no sealing.Selected two types of drilling hole (φ50 mm,φ65 mm) to split the coal seam in the field,it has good pressure relief effect monitored by peeping drilling hole and optical fiber sensor,the research results can be applied in high gas and rock burst mines.
Keywords：rock burstliquid CO2 fracturing techniquethe conversion rate of pressurepeeping drilling holeoptical fiber monitoring
Publication Date：2017-01-01