Low cost paste filling station for gold mines
Basic principles
Gold filling mining technology is a technique that uses the mineral deposit itself or external materials to fill the goaf during the mining process, in order to support the ground and solve problems such as geological environment changes and ground subsidence caused by the goaf. At present, backfill mining technology is mainly divided into two types: cement backfill method and cemented backfill method.
Cement filling method
The cement filling method is to mix the unmined part of the ore deposit or the slag soil in the slag silo with materials such as cement and lime to form a cement slurry, and then fill it into the goaf. The load of the ore body itself and the mechanical properties of the filling material itself jointly maintain the stability of the filling body.
Cemented filling method
The cementing filling method is to use polymer cementitious materials to mix with solid particles in the ore body to form a high concentration gel like substance, which is directly injected into the goaf. The flowability of colloids is much higher than that of cement slurry, and they can penetrate into smaller cracks in the ore body, fully fill the voids, and form a solid and elastic filling body.
Application situation
Safe, environmentally friendly, and efficient
The backfill mining technology in gold mines is a mining technology that integrates safety, environmental protection, and efficiency, and has gradually become the preferred technology for gold mining. Since the 1990s, China has been researching and introducing backfill mining technology for gold mines. It has been applied in practice since around 2000 and has achieved significant economic and environmental benefits.
Remediation for ecological and environmental issues
The application of backfill mining technology is mainly reflected in compensating for the ecological and environmental problems caused by goaf. By filling, surface subsidence can be effectively prevented, groundwater resources can be protected, geological disasters can be reduced, and ecological balance can be maintained.
New Technology and Innovation
New technology of backfill mining in metal mines
Invented a new technology for backfill mining in metal mines, which has been evaluated by experts as a technological revolution in backfill mining methods. This technology is the result of interdisciplinary collaboration, combining knowledge from multiple fields such as materials science, fluid mechanics, mining engineering, etc., to propose a new mechanical calculation model for rock masses and a new theory for the relationship between supporting surrounding rocks.
Application of high water materials
Using high water materials as binders, the filling slurry does not dehydrate at all, achieving full coverage of the filling body in the mining area, changing the harsh underground environment, and ensuring safe production. The filling material has good overall performance and high strength, fundamentally solving the secondary impoverishment and loss of ore caused by the mixing of filling materials, greatly improving the resource recovery rate.
The advantages of backfill mining method
Improve resource recovery rate
The new filling material has outstanding characteristics such as high water content, strong drought resistance, and rapid setting, which solves the technical problems of long production cycle and unbalanced mining and filling caused by difficult dehydration and long maintenance period of cement filling slurry in the mining field.
Protecting the ecological environment
The use of mining waste tailings as filling material has significantly reduced environmental pollution, protected ecological balance, and played a role in turning waste into treasure and harm into benefit.
Previous：Low cost filling of iron ore mountains Next：Industrial filling pump Return