Geomechanical Model Test of AFR Mining Method

In Chap. 5, geomechanical model testing is an effective means of simulating the overall research of engineering sites, but existing model testing systems do not have specialized equipment to simulate the core process of AFR mining methods. The model test system of AFR without mine pillars with an integrated mining and roadway retention mode was developed. It can truly simulate the entire process of mining, excavation, and retention integration using the AFR mining method without pillars. Geomechanical model tests were conducted on different types of roadways, such as shallow buried depth, deep buried depth, and fault structural areas. The stress evolution law, deformation and failure characteristics of surrounding rock, and the movement law of overlying rock in the mining area and roadway are compared and analyzed. The control mechanism of AFR under different condition parameters was clarified, which provides an experimental basis for the on-site application design of AFR mining method.