Abstract
This paper discusses the development and challenges of mining backfill technology for the past 20 years. The traditional backfill technology such as rock backfill, hydraulic backfill and paste backfill as well as some emerging mining backfill technologies as the “High water content backfill technology”, “Total tailing backfill technology” and “Mining paste-like backfill technology” were also detailed discussed for the challenges in engineering application, and it is illustrated that they indeed have some unique characteristics in high-early strength, excellent workability, and resisting dewatering. In the mining backfill, many factors attribute to the performance of the backfill body, and it is found that the properties of the binder and the grade of the tailings as aggregate play significant role in the mechanical properties of the backfill body.
Highlights
In China, the mining industry produces different types of waste such as tailings, waste rock, and water treatment sludge (Aubertin et al, 2002)
The traditional backfill technology such as rock backfill, hydraulic backfill and paste backfill as well as some emerging mining backfill technologies as the “High water content backfill technology”, “Total tailing backfill technology” and “Mining paste-like backfill technology” were detailed discussed for the challenges in engineering application, and it is illustrated that they have some unique characteristics in high-early strength, excellent workability, and resisting dewatering
Rock backfill and hydraulic backfill usually used for waste rock and sand disposal and the cemented paste backfill usually acts as an optimal solution for recycling the waste tailings
Summary
In China, the mining industry produces different types of waste such as tailings, waste rock, and water treatment sludge (Aubertin et al, 2002). A lot of various techniques have been used in mining industry to dispose them, such as rock backfill, hydraulic backfill and cement paste backfill. Rock backfill and hydraulic backfill usually used for waste rock and sand disposal and the cemented paste backfill usually acts as an optimal solution for recycling the waste tailings. Stockpiled industry waste is still in an accumulated trend throughout the world. In this case, clean and efficient mine backfill technology attracts the attention from the scientists and policy makers throughout the world (Benzaazoua et al, 1999). The development of the mining backfill will be reviewed and different backfill technologies will be discussed according to specific challenges in industrial application
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