TY - JOUR
TI - Fine characterization and grouting simulation of borehole fracture development in burnt rock
AU - Zhu Kai-Peng
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1231
EP - 1236
PT - Article
AB - Burnt rock, as a special rock characterized by highly developed internal  fractures, provides excellent spatial conditions for the storage of  groundwater resources. However, due to the mining disturbance in the working  face of the coal seam, the internal fractures of the burnt rock layer will  further develop to generate a large number of macroscopic fractures. If  these fractures expand to the working face of the coal seam, it will bring  safety problems to coal seam mining. Therefore, this study first conducted a  detailed identification of borehole fractures in burnt rock, constructed a  fracture distribution model, and analyzed the development of fractures in  the burnt rock layer. Second, grouting simulations of the burnt rock mass  with fractures were performed to examine the stress field distribution of  the burnt rock mass under different grouting pressures. It is concluded that  for regions with uniformly distributed fractures, a grouting pressure of 2.0  MPa is more effective, while the areas with non-uniformly distributed  fractures require a grouting pressure of 2.5 MPa.