Bauxite soft roof advance grouting solidification method

By using advanced grouting methods and silicate-modified polyurethane two-component materials, the weak roof of bauxite mines was pre-grouted and solidified, solving the problems of low roof strength, crack development, and resource loss, and improving the stability and safety of the roof.

CN122407235APending Publication Date: 2026-07-17GUIZHOU UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU UNIV
Filing Date
2026-06-03
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

During underground bauxite mining, the weak roof has low strength, developed fissures, and is prone to disintegration when exposed to water, resulting in poor stability of mining operations and reliance on retaining roof supports, which leads to resource loss.

Method used

The advanced grouting method was adopted. By obtaining information on the direct roof and the indirect old roof, the control interface at the bottom of the grouting hole was determined. The silicate-modified polyurethane two-component grouting material was used for advanced grouting to form a reinforced area. The curing quality was verified by core drilling, sonic testing and on-site stability monitoring.

Benefits of technology

It improves the overall strength of the weak roof and the effect of crack filling, ensures the stability and safety of mining operations, avoids resource loss, and provides a basis for determining the conditions for canceling roof protection mines.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122407235A_ABST
    Figure CN122407235A_ABST
Patent Text Reader

Abstract

The application belongs to the technical field of roof reinforcement and support in underground mining, and discloses a bauxite soft roof advanced grouting solidification method. The method first acquires direct roof and indirect old roof information, determines the soft direct roof to be solidified, and takes the lithological interface between the soft direct roof and the indirect old roof of dolomite as the bottom control interface of the grouting hole. Then, the advanced grouting hole is arranged according to the working conditions such as mining and cutting roadway excavation, room and pillar mining or room and pillar subsequent filling, and the grouting solidification is carried out by using silicate modified polyurethane two-component material. Finally, the solidification quality is verified by coring, acoustic wave and on-site monitoring, and the roof protection mining and excavation operation is cancelled after the index is met, so that the roof stability and resource recovery rate are improved.
Need to check novelty before this filing date? Find Prior Art