Method for keeping compressed state of saturated gravel body

Abstract

The invention discloses a method for keeping a compressed state of a saturated macadam body. The method comprises the following steps: (1) soaking macadam for a test in water until the macadam is saturated; (2) selecting a container for a compression test, and pouring the sol resin slurry into the container; (3) adding the saturated broken stones in the step (1) into the container in the step (2); (4) carrying out a compression test on the broken stones in the step (3) by using a movable pressure plate with a plurality of small holes; (5) after the test is finished, keeping the application state of the compression stress of the movable pressure plate, and after the sol resin slurry is fully cured, removing the applied compression stress; (6) taking out the crushed stone sample in a compressed state from the container, and studying the crushing and contact conditions of the compressed crushed stone in a slicing and grinding manner after sampling; a saturated sample can be kept in a compressed state in an experimental state, and conditions are provided for later sample slicing, modeling, analysis of a crushing state of the sample and a contact relation between gangue blocks and the like.

Description

technical field [0001] The invention relates to the field of compression testing of saturated crushed stone bodies, in particular to a method for maintaining a compressed state of saturated crushed stone bodies. Background technique [0002] Crushed stone is often used as a filling material. For example, mines often use gangue for filling and mining to reduce the amount of subsidence on the surface. The crushed rock mined by backfilling in mines often goes through the process of crushing→filling→compression→water immersion. Before the filling mining process is adopted, the corresponding compression test is generally carried out with pre-filled gangue, and the specific filling process design is carried out according to the test results. [0003] Conventional shrinkage tests often study the relationship between compressive stress, gangue moisture content, and gangue size equal to the amount of compression. At a deeper level, the change of the gangue crushing state and the co...

AI Technical Summary

Problems solved by technology

Due to the opaque structure of gangue, it is currently impossible to visually observe the crushing state of gangue and the change of contact relationship between gangue blocks

At present, relatively high-end CT scanning technology is expensive, the scale of scanning samples is limited, and the resolution of scanning is relatively low, so the application is severely limited.

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