Performance Evolution and Formulation Improvement of Resin-Based Anchoring Materials for Hydrochemical Environments

Area of Science:

• Geotechnical Engineering
• Materials Science

Background:

• Resin anchoring agents in deep coal mines face performance degradation due to water and chemical aggression.
• This compromises the reliability of crucial support systems in underground engineering.

Purpose of the Study:

• To quantify the performance deterioration of conventional resins.
• To develop and validate a more resilient resin formulation for harsh mining conditions.

Main Methods:

• Conducted uniaxial compression, pull-out, and interface shear tests.
• Systematically improved resin formulation with hydroxypropyl acrylate and super absorbent polymer (SAP).
• Performed microstructural analysis using Scanning Electron Microscopy (SEM).

Main Results:

• Conventional resin strength decreased by over 40% with 30% water and 70% in acidic conditions (pH=5).
• Improved resin showed 20% higher initial strength and retained over 85% strength under water saturation.
• SEM revealed a denser microstructure in the improved resin, suppressing microcrack formation.

Conclusions:

• The enhanced resin formulation significantly improves durability and safety in challenging underground environments.
• The new material offers a robust solution for long-term anchorage support system reliability.
• This research contributes to safer and more resilient mining operations.