A method for judging the failure type of seepage deformation of tailings silt

Abstract

The invention provides a judgment method applicable to a seepage deformation and damage type of tail silt. The judgment method comprises the following steps: 1, carrying out grain grading characteristic analysis on more than 4000 sets of tail silt of 40 seats of upstream-method tailing fill dams; 2, carrying out overlapping analysis on a scatter diagram of flowing soil type and piping type seepage deformation characteristics; 3, testing the content of grains with the diameter of less than 0.005mm, the content of grains with the diameter of less than 0.0075mm and the non-uniform coefficient according to grain size analysis in a sample chamber; judging according to a judgment sheet of the seepage deformation and damage type of the tail silt. The judgment method has the advantages that 1, the judgment method directly utilizes grain grading characteristic parameters of a conventional grain size test and the extra working amount does not need to be increased; 2, three sets of grading characteristic data are used for judging and the accuracy of a judged conclusion is high; 3, the method is tabulated and directly utilizes common grain grading characteristic data in a soil engineering test result summary sheet, and is convenient to use.

Description

technical field [0001] The invention relates to the field of geotechnical engineering survey and design, in particular to a method for judging the seepage deformation and damage type of tailing silt sand. Background technique [0002] Upstream tailings dam is one of the most important methods of damming tailings ponds. Whether the tailings accumulation dam is stable or not directly affects whether the tailings pond can be used safely and normally. The seepage stability check is one of the important contents in the design, treatment and safe operation evaluation of the upstream tailings dam, and the seepage deformation characteristics of the tailings are the basis for the check calculation of the seepage stability. The damage types of seepage deformation of tailings include flow soil and piping. With the improvement of mineral processing technology, the tailings particles are getting finer and finer, and the tailings accumulation body is mainly composed of tailings silt, tai...

AI Technical Summary

Problems solved by technology

Tailings soil is man-made mechanically crushed soil. Compared with natural soil, its gradation is continuous, its specific gravity is large, its sorting property is poor, and its particle size fluctuation range is narrow. Applying the current discrimination method of "Code for Geological Investigation of Water Conservancy and Hydropower Engineering" the judgment results are as follows: A large part is contrary to the actual situation, and this judgment method is not applicable to tailings soil

Therefore, so far there is no suitable method for judging the damage type of seepage deformation of tailings soil.

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