Ultra-Fine Cement Grouting Material

Restores Coal Strength

A grouting material for fractured coal that restores 65–85% of intact peak strength and significantly improves post-peak stability.

Zhang, Yaohui · Xiong, Zuqiang · Liu, Xufeng · Wang, Chun · Ke-Ke, Yang

Materials 2026

Specifications

Post-peak residual bearing capacity recovery

{'zh': '65~85', 'en': '65~85'} %

Advantages

Recovers 65–85% Strength

After grouting, the residual bearing capacity of post-peak coal samples recovers to 65~85% of the intact peak strength, significantly enhancing the bearing capacity of fractured coal.

Stable Post-Peak Deformation

Grouting leads to stable strain softening in the post-peak stage, avoiding sudden instability and improving the ductility of the coal.

Forms Ductile Grid Skeleton

The grouting material forms a ductile grid skeleton inside the coal, coordinating deformation and improving the stress state, thereby enhancing post-peak bearing capacity.

Applications

• Coal Mine Roadway Reinforcement：Inject into fractured coal to restore bearing capacity and control large roadway deformations.
• Coal Face Roof Control：Reinforce fractured roof to prevent slab cracking and roof collapse.
• Tunnel Grouting Reinforcement：Used for grouting reinforcement of fractured tunnel surrounding rock to improve stability.
• Underground Engineering Rock Reinforcement：Grout fractured surrounding rock in underground engineering to form a ductile skeleton.