Influence of Different Grouting Parameters on Mechanical and Strain Energy Characteristics of Different-Length Fractured Limestone in a Coalfield North of Yellow River: A Numerical Study Based on Particle Flow Code

Floor grouting reinforcement and aquifer reform can effectively improve the water barrier performance of fractured rock mass, which is widely used to prevent inrush from a confined in theClean Utilization SDUST Research Fund floor. In order reveal mechanical strain energy characteristics mass after with different parameters, discrete element numerical simulation software PFC study limestone filling fractures cement stones parameters. The test results show that displacement stone bodies longer prefabricated crack length decreases more obviously grouting, energy, dissipation total input increase when strengthened sample destroyed. greater stiffness stone, easier will be destroyed position crack. internal friction angle has little effect on strength, deformation, limestone. Under same cohesion, number distribution range secondary cracks smaller are larger. However, tensile strength stones, number, range, increasing. is, influence parameters rock. provides reference for selection material during reinforcement.