Device and method for preparing cylindrical standard test pieces of filling bodies

Abstract

The invention relates to a device and a method for preparing cylindrical standard test pieces of filling bodies, and belongs to the field of mine filling theories and technologies. The device comprises a bottom mold, a side mold and a float mold. A groove which is of a circular structure is formed in the center of the bottom mold and is filled with the bottom of the tubular side mold, the side mold comprises three identical arc-shaped split structures, a convex edge structure is arranged at the upper end of the side mold, the tubular float mold sleeves the convex edge structure, and the convex edge structure is embedded in a concave edge structure on the float mold. The method includes filling the assembled device with slurry by means of pouring at one step; detaching the float mold after 6 hours, scraping redundant filling bodies which exceed the height of the side mold and enabling test pieces and the side mold to be positioned at the same height; detaching the side mold and the bottom mold after 24 hours, taking out the test pieces, numbering the test pieces and maintaining the test pieces according to requirements to completely prepare the test pieces. The device and the method have the advantages that the side mold comprises the three identical arc-shaped split structures, and accordingly the test pieces can be prevented from being damaged and can be conveniently released from the molds; the float mold is connected with the upper end of the side mold, and accordingly the prepared test pieces can be assuredly completely prepared by means of pouring at one step.

Description

technical field [0001] The invention relates to a device and method for preparing a cylindrical standard test piece of a filling body, belonging to the field of mine filling theory and technology. Background technique [0002] The mechanical parameters of the mine filling body are important indicators for the evaluation of stope filling quality, and the test of the mechanical parameters of the filling body needs to prepare a cube (70.7mm×70.7mm×70.7mm or 100mm×100mm×100mm) or a cylinder (generally Φ50mm ×100mm) specimen. At present, cube specimens are commonly prepared with standard triple molds, while cylindrical specimens are produced in different ways, some are prepared by drilling and cutting cube specimens, some are prepared by using PVC pipes as molds, and some are prepared by two hollow molds. The half cylinders are spliced ​​into mold preparation. The water in the drilling and cutting has a great influence on the mechanical parameters of the filling body, and cause...

AI Technical Summary

Problems solved by technology

The water in the drilling and cutting has a great influence on the mechanical parameters of the filling body, and causes some damage to the test piece; when the PVC pipe or semi-cylindrical composite mold is prepared for the test piece, it needs multiple pouring due to the consolidation and settlement of the slurry. Delamination of the test piece is caused, and at the same time, the integrity of the test piece is destroyed due to the clamping effect of the mold when the mold is removed

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