Mold-making device and method for preparing test blocks for filling mine tailings

Abstract

The invention relates to the field of mine filling body testing devices, and provides a molding device used for preparing mine milltailings filling check blocks and a check block preparation method. The molding device comprises a box-shaped frame, an isolation baffle, a water permeable bottom plate and a forming mold. The side walls of the box-shaped frame are detachable. The side walls of the box-shaped frame are provided with isolation baffle positioning grooves, and the bottom of the box-shaped frame is provided with bottom plate insertion groove holes and bottom plate positioning grooves. The isolation baffle is detachably connected with the box-shaped frame through the isolation baffle positioning grooves, and the bottom end of the isolation baffle is attached to the upper surface of the water permeable bottom plate. The water permeable bottom plate is detachably connected with the box-shaped frame through the bottom plate insertion groove holes and the bottom plate positioning grooves. According to the molding device, the man-made interference in the pouring process of filling slurry is reduced to the maximum extent, the regularity of the check blocks are improved, the testing method is simple and easy to be standardized, the precision of filling check block strength tests is effectively improved, and the molding device is suitable for manufacturing all kinds of mine filling check blocks, especially the preparation of high-requirement and standard check blocks with coarse aggregate slurry, high-concentration slurry, different dewatering conditions and the like.

Description

Technical field [0001] The invention relates to the field of testing devices for mine filling bodies, in particular to a mold making device for preparing test blocks for filling of mine tailings and a method for preparing test blocks. Background technique [0002] The use of tailings to fill the goaf is an effective stope support method and tailing treatment method, which can not only ensure the underground operating environment, but also solve the problems of tailings occupation, underground goaf and surface subsidence. The stability of the backfill is the most critical factor when designing the backfill mining method. Research shows that the strength of the backfill is the most important parameter that determines the structural function of the backfill. [0003] The filling ratio test determines that the mechanical strength of the filling body is the key link before filling operation, and the filling mechanical strength is obtained through the strength test of the filling body te...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a mold-making device for preparing mine tailings filling test blocks and a method for preparing test blocks, so as to solve the problems of existing test block pouring molds and methods for preparing filling bodies During the test block, due to the high concentration of the slurry or the addition of coarse aggregate, the surface of the prepared test block has long strips of pores, and the coarse particles are unevenly distributed in the test block of the filling body, resulting in irregular test blocks, resulting in strength test results. Distortion, unable to meet the technical problems of making standard test blocks; the invention can simulate different drainage conditions in the curing process, improve the similarity between the curing conditions of the test pieces and the stope environment, make the test process easy to standardize, and improve the reliability of the test results; at the same time , it can also simulate the strength distribution of the filling body at different positions relative to the discharge port after the slurry is free leveled in the stope

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