Grouting Reinforcement Technology of Mining Goaf Underlying Industrial Square of Nianzigou Mine
CHEN Shi-qing
Abstract：A design and layout of the proposed buildings for the mine reconstruction project of Nianzi-gou Mine was located in the previous mine industrial square with a land area about 22 000m2.In the mine reconstruction period ,surface ground subsidence was occurred .With the geological survey ,many residual cavities possibly existed in the underground underlied the industrial square were found and would cause unfavorable influences to the stability of the proposed buildings with safety hidden dan-gers .According to the hydrogeologic conditions of the industrial square and the deposition conditions of the mining goaf ,a surface grouting method was applied to the backfill reinforcement of the goaf un-derlied the industrial square and the grouting material were the cement and fly ash grout and the fine aggregates.There were 62 883m3 of the grout injected and 177m3 of sand put in the underground.An expected effect was reached.Successful experiences were obtained from the project construction and could provide references to the treatment of the mine goaf.
Keywords：industrial squaremining goafgrouting reinforcementcement and fly ash grout
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 19-21 )