The Treatment Technology of Banbidian Goaf in Qinhuangdao

摘要

The issues induced by underground mining are worldwide difficulties because the mined-out area is undesirable due to its implicity, complexity and large deformation. This paper describes the harmfulness of golf in highway construction based on the general failure characteristics of overlying rock masses. Grouting method was employed to improve the Banbidian goaf. Verification of the reinforcement effect was carried out using packer test and core extraction. The results show that this technique has achieved desired effects and hence could be referenced by other fellows.