Abstract
A numerical simulation was carried out to study the high-pressure air intrusion into fractured rock mass and the flow of fissure water induced by the intrusion: The fracture network model consists of many interstices of different widths and various directions.
The results show that the air replaces the fissure water much fast-er in larger interstices than in smaller ones. Thus, larger interstic-es serve as the path of the air flow, while smaller ones function to store the water. This flow characteristics of the air and the fissure water is important to control the leakage of compressed air by water injection in fractured rock mass whose density of interstices is too small to regard rock mass as porous medium.
