A performance testing device for mine roof reinforcement material and its application method

Abstract

The invention discloses a performance test device for a mine roof reinforcement material and a use method thereof. The performance test device comprises a roadway system, a supporting plate system, a confining pressure loading system and an axial pressure loading system, wherein the roadway system comprises a shell and an inner cavity surrounded by the shell; the supporting plate system is provided with a supporting plate, the supporting plate takes the shape of an arched surface consistent with an actual roof in shape, and the supporting plate system is arranged at the lower part of the inner cavity; the confining pressure loading system is provided with a telescopic confining pressure plate and is enclosed at the side wall of the inner cavity; the axial pressure loading system is provided with an axial pressure plate and is arranged at the upper part of the inner cavity, and the inner cavity, the supporting plate, the confining pressure plate and the axial pressure plate are enclosed to form a filling space of the reinforcement material. According to the performance test device disclosed by the invention, the shape of the filling space fully simulates the practical situations of the site roof; through applying confining pressure and axial pressure, the real ground stress environment of an underground coal seam reinforcement roof is stimulated, therefore, the true compressive performance of a test block is tested, and the situation that as the ground stress problem is ignored, the reasonable evaluation on the reinforcement material cannot be made is avoided.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to a performance testing device for a mine roof reinforcement material and a method for using the same. Background technique [0002] With the expansion of the scope and depth of coal mining, unstable and extremely unstable broken coal and rock masses are increasing day by day, and broken roofs are likely to cause roof caving accidents, which pose a serious threat to the safety of coal mines underground. [0003] For the extremely broken coal rock mass, the coal rock mass can improve the structure and performance of the extremely broken coal rock mass through grouting, which can effectively solve the troubles caused by the roof accident to the coal mine. Grouting materials with good performance have become the key to solving roof accidents. At present, grouting materials with good performance are being used one after another, but the testing equipment for testin...

AI Technical Summary

Problems solved by technology

This method is simple and easy to implement, but this method cannot truly reflect the actual environment on site, and the selected small test blocks are difficult to reflect the real state of the broken roof after grouting

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