有色设备

Micro-fracture seepage damage is an important influencing factor in the formation of the dominant path of fault water inrush. In this paper, by constructing a three-dimensional single fracture seepage model, the influence of different particle size and incident velocity on the erosion damage of single fracture wall is explored. The results show that there is a power function relationship between particle incident velocity, particle size and average erosion rate. The erosion rate of single fracture increases under the action of high-speed particles and large-size particles, and the influence size is: particle incident velocity ＞ particle size. Under the action of hydraulic action and particle abrasion, the more serious period of fracture damage is mainly concentrated in the stage of fracture development.