Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology-Beijing
Inner Mangolia Research Institute, China University of Mining and Technology-Beijing
Key Laboratory of Safe and EffectiveCoal Mining, Ministry of Education, Anhui University of Science and Technology
Engineering Research Center of UndergroundMine Construction, Ministry of Education, Anhui University of Science and Technology
State Key Laboratory ofMining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology
CCTEG Coal Mining Research Institute

Grouting reinforcement is an effective method for controlling the stability of engineering rock mass. The mechanismis mainly to inject or infiltrate the grout into the fracture of rock mass to form a grouting entity, and strengthen the stability of rock mass and the ability to resist failures. In order to realize the calculation of the whole process of groutingdiffusion and consolidation in broken surrounding rock, a diffusion-consolidation mechanism of grouting based on discreteelement method was proposed. Also, the model checking and example analysis were carried out, and the results showthat: ① In the full-length grouting of single fracture scenario, the shear peak strength of the post-fractured rock mass ishigher than that of the non-grouting fracture, which depends on the frictional resistance generated by the solidification andcohesion of the slurry. ② In the point grouting simulation experiment, as the grouting pressure increases, the grout continuesto diffuse. Therefore, the pre-peak shear yielding and post-peak phases of the rock mass are strengthened. ③ For theengineering-scale simulation test, as the grouting pressure increases, the diffusion radius increases in two stages. When thegrout expands to the high-stress area, it needs to overcome a greater compressive stress to achieve flow. After reaching arelative higher grouting pressure, the diffusion area of adjacent boreholes is superimposed to form a grouting whole bodythat surrounds the roadway. When the solidification bond strength of the grout is low, the failure of contact is still the maincontrolling factor to determine the failure and instability of the roadway.

国家自然科学基金资助项目（52204162，52204121）；北京市自然科学基金资助项目（3232026）

张洪伟，姜汉，刘世奇，等. 基于D-Rb-C 耦合模型的破碎岩体注浆加固作用机制与规律[J]. 煤炭学报，2023，48（4）：1464−1475.
ZHANG Hongwei，JIANG Han，LIU Shiqi，et al. Mechanism of grouting diffusion and consolidation of rock mass based on D-Rb-C coupled model[J]. Journal of China Coal Society，2023，48（4）：1464−1475.

ZHANG Hongwei，JIANG Han，LIU Shiqi，et al. Mechanism of grouting diffusion and consolidation of rock mass based on D-Rb-C coupled model[J]. Journal of China Coal Society，2023，48(4)：1464−1475