Analysis of strength failure in gangue-based cementitious backfill body from a microscopic perspective.

ABSTRACT: Backfill mining is an effective way to solve environment pollute, surface subsidence, and groundwater system damage which caused by coal mining. However, the complex underground environment may change the physical and mechanical properties of the backfill body, which poses a risk of strength failure. This paper analyzed the failure of gangue-based cemented backfill body which made up of gangue and fly ash. The results show that physicochemical reactions will generate quartz, kaolinite, and other high-strength substances; hydration reaction between the fine particles will generate hydrocalcium silicate and other C-S-H gels, they wrapped gangues as a whole, which provide a high strength of the cemented backfill body. Several experiments were carried out in order to find the reason for failur

SUBMITTER: Wang H 

PROVIDER: S-EPMC10984401 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature