STUDY ON THE METHOD OF DETERMINING THE SCOPE OF GROUTING TREATMENT BASED ON ANALYSISING ACTIVATED DEFORMATION LAWS OF GOAF

The results of similarity model test show that,the laws of activated deformation is essentially different from the Laws of mining subsidence in goaf.As different mining methods,the development degree of residual fissure in different parts of the goaf has great difference,and the scope on Surface influented by residual fissure falling further and compaction is smaller than the one influented by mining subsidence.According to the results of similar simulation experiment and refered to the Previous treatment experience of highway goaf,we summarized reference value of overburden stratas displacement angle,proposed that determining the treatment depth according to the crack distribution of goaf and its laws of activated deformation.Compared to currently used methods,This method can greatly reduce the treatment scope and depth of goaf and save investment with significant economic benefits.Achievements will play an important role in promoting the use of treatment technology on goaf.