在理论分析工作面煤壁破碎机理的基础上,运用课题组研制的水灰比可调控的高性能无机注浆材料结合层次分区注浆加固技术在末采阶段进行注浆加固。浅部注浆形成有效的止浆层,显著地提高了深部注浆效果。工作面的破碎煤体得到有效的充填和固结,煤体整体性得到显著的提高。 Based on the theoretical analysis of the mechanism of coal wall crushing, the grouting reinforced by high-performance inorganic grouting material with combination of hierarchical grouting reinforcement technology and water-cement developed by the research group was applied at the final mining stage. Shallow grouting to form an effective grouting layer, significantly improve the deep grouting effect. Broken coal working face to be effective filling and consolidation, coal integrity has been significantly improved.