عنوان مقاله [English]
Injection as a conventional method is used to seal permeable dams and tunnel walls. Faults, joints, and layering surfaces exist as open discontinuities of varying degrees in all rocks. Discontinuities can be completely closed or open, affecting the strength and permeability of the rocks. The injection is the process by which the material is injected into the seams and crevices and porous spaces of rocks and soils, improving physical and strength properties and reducing the permeability of the organization. In the last two decades, the use of nanoparticles in engineering, medical sciences, etc has been very significant. In recent years, the addition of silica nano-particles and iron nano-particles to concrete, cement, and all construction materials has been growing rapidly due to increased efficiency and improvement of important and essential parameters in this industry. The purpose of this study was to analyze by a cylinder under high-pressure superfine cement injection press with additive silica nano-particles with different W/C ratios. Simulation of broken rock environments, single-seam or one-sided, has been performed by laboratory blades with dimensions of 40, 50, 60, 80, 100, 150 and 200 microns in laboratory conditions. The results of super-fine cement injection operations with silica nanoparticles indicate that the best and most effective injection operations are W/C: 3/2, 3/1, 1/0.7 and 1/1 ratios in the blade filter.