Determination device and method for mine tailing filling grain class distribution rules

Abstract

The invention discloses a determination method for mine tailing filling grain class distribution rules. A customized organic glass determination device is used, natural sedimentation and permeation of tailing slurry with an actual concentration are simulated, a water content test and a grain class screening test are conducted on sediment tailing at different heights, test data is sorted and analyzed, and thus the tailing grain class distribution rules of a sand silo or a filled goaf are obtained. According to the scheme, the method has the advantages of being high in reliability, easy and flexible to implement, wide in application range and the like, overcomes the defects in the background art and can be used for directing actual production. Meanwhile, the invention discloses the determination device for the mine tailing filling grain class distribution rules.

Description

technical field [0001] The invention relates to a device and method for measuring the grain size distribution law of mine tailings filling, in particular to the measurement and exploration of the tailings grain size distribution law in metal mine graded tailings or full tailings filling system sand bins and filling voids. Background technique [0002] The particle size distribution of mine tailings in the sand bin and in the underground goaf directly affects the filling efficiency of the filling process, the management of the filling space and the control of ground pressure, and is an important link in the overall filling process. When pumping low-concentration tailings slurry into the sand bin or using filling pipelines for hydraulic transportation, it is necessary to remove excess water in the tailings to meet the requirements of filling slurry or hydraulic filling. Generally speaking, the permeability of tailings filling is characterized by the permeability coefficient. ...

AI Technical Summary

Problems solved by technology

In actual production, the uppermost layer of "fine mud" tailings (especially full-grain tailings) will form a dense "mud layer" due to its own gravity and the extrusion of the upper sand particles. To some extent, it blocks the penetration of water, which has a very bad impact on the dehydration of the filling empty space and the control of the slurry concentration of the sand bin, and seriously affects the normal filling operation.

At the same time, the cement layer is relatively viscous and aggregated into agglomerates, which has become a "persistent disease" for regular cleaning of the sand bin. It cannot be completely solved by high-pressure water washing, and manual treatment is necessary, which is time-consuming and laborious.

[0004] The original qualitative measurement method of small measuring cylinder in the laboratory is difficult to simulate the actual situation of the underground empty area, and the authenticity of the measurement results is low

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