Cemented filling method using barren rock machine-made sand as aggregate

Abstract

The invention discloses a cemented filling method using barren rock machine-made sand as aggregate. The cemented filling method can be used for using a large amount of barren rock for underground filling, thereby relieving the pressure of mine environmental protection and reducing the cost of environmental recovery and treatment; the underground filling aggregate source can be expanded, and the mine production cost is reduced; through the step d, the optimal mixing proportion can be selected conveniently, and it is guaranteed that the machine-made sand can replace natural sand to serve as filling aggregate; and through the step f: determining parameters of mass concentration, water-cement ratio and cement-sand ratio suitable for mine filling slurry, and respectively testing the fluidity of the filling slurry and the strength of a cemented filling body according to a plurality of determined mixing ratios of machine-made sand, cement and water, and determining the mass concentration, water-cement ratio and cement-sand ratio parameters suitable for the mine filling slurry according to the test result in combination with the requirement of the mine for the strength of the cemented filling body and the requirement for the fluidity of the slurry, the corresponding mass concentration, water-cement ratio and cement-sand ratio parameters can be selected conveniently according to the requirements of different mines for the strength of the filling material.

Description

technical field [0001] The invention belongs to the field of cemented filling in goafs of mines, and in particular relates to a cemented filling method in which waste rock machine-made sand is used as aggregate. Background technique [0002] During the production process of mines, a large amount of waste rocks will be produced. These waste rocks are generally piled on the surface, resulting in the occupation of a large amount of land resources, while destroying the ecological environment of the mining area, and increasing the risk of inducing secondary geological disasters, requiring a lot of manpower, material resources, Financial management. At present, with the introduction of relevant policies such as national green mine construction and mine ecological environment restoration and management, mining companies are required to strengthen environmental restoration and management, and mining companies are encouraged to improve the level of comprehensive utilization of solid ...

AI Technical Summary

Problems solved by technology

[0002] During the production process of mines, a large amount of waste rocks will be produced. These waste rocks are generally piled on the surface, resulting in the occupation of a large amount of land resources, while destroying the ecological environment of the mining area, and increasing the risk of inducing secondary geological disasters, requiring a lot of manpower, material resources, Governance with financial resources

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