磁性水泥基浆液粘度瞬变特性及倾角裂隙磁注浆机理研究

doi:10.11896/cldb.24090161

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Abstract There are a large number of inclined fractures in the rock mass, which may be prone to hazards such as slipping and collapsing when subjected to external forces, posing a serious threat to the safety and stability of engineering structures. Based on self-developed cement-based magnetic slurry materials, through scanning electron microscope (SEM), X-ray diffraction (XRD) and compressive strength tests, the influence mechanism of waterborne epoxy resin on the strength of magnetic liquid from a microscopic perspective was analyzed, the changes in magnetic induction intensity at different regions under the gradient magnetic field were analyzed, and the evolution process of magnetic particle chaining was investigated. The internal influencing mechanism of the sudden change in slurry viscosity under the magnetic field intensity was revealed. Using the self-developed variable inclination fissure visualization grouting test device, systematically studied the grouting diffusion law of magnetic slurry in fissures with different inclinations under the action of magnetic field, and established a magnetic slurry grouting diffusion model that takes into account the action of magnetic field and the relationship between the viscosity of the slurry and the change of magnetic induction strength. The results show that: (1) the dynamic viscosity of the slurry increases exponentially with the increase of the magnetic induction intensity. When the magnetic field intensity reaches 1 000 Gs, the slurry viscosity increases by 17.26 times compared with the initial dynamic viscosity. (2) Under the action of the magnetic field, the magnetic particles interact with each other to form a chain structure. The greater the magnetic field intensity, the more significantly the length of the magnetic force chain and the higher slurry viscosity. (3) When the magnetic field intensity increases from 6 000 Gs to 12 000 Gs, the diffusion area of the slurry increases by 48.87%, indicating that the increase of the magnetic field intensity helps to enhance the diffusion area of the magnetic slurry. The error values between theoretical values of the diffusion model and the experimental values are all relatively small. These findings have certain reference value for perfecting the theory and application of magnetic slurry.

Key words： inclined fissure magnetic slurry magnetic field strength viscosity transient magnetic grouting modeling

Published: Online: 2025-10-27

CLC number:

TU578

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	Articles by authors
	LI Zhao
	BAO Xiaopeng
	LIU Jie
	LI Zheng
	YANG Yunan
	QIAO Zhicun

Cite this article:

LI Zhao,BAO Xiaopeng,LIU Jie, et al. Study on the Viscosity Transient Characteristics of Magnetic Cementitious Slurry and the Mechanism of Magnetic Grouting in Inclined Fissures[J]. Materials Reports, 2025, 39(20): 24090161-9.

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https://www.mater-rep.com/EN/10.11896/cldb.24090161 OR https://www.mater-rep.com/EN/Y2025/V39/I20/24090161

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