A method for controlling rock or concrete breakage patterns

Abstract

The invention belongs to the technical field of static crushing and particularly relates to a method used for controlling rock or concrete crushing modes. A three-directional guide device and a four-directional guide device are adopted, and the guide devices consist of steel cylinders containing different numbers of cut openings and handles. Through using different types of guide devices and matching a proper hole distribution mode, the purpose of controlling rock or concrete crushing modes can be achieved. By utilizing the principles that the tensile strength of a brittle material is far lower than compressive strength and concentrated tensile strength easily occurs in the cut opening positions of the cylinders, crushed bodies easily crack in cut opening positions, and the purpose of controlling crack expansion directions is achieved. The size of tensile stress produced by a static crushing agent in the cut opening positions of the cylinders is regulated through changing the cut opening sizes of the cylinders, and a function of regulating hole distances is realized. The purpose of effectively controlling charge quantity is achieved through scale marks on the side walls of the guide devices. The method is suitable for controlling rock or concrete crushing modes and has the characteristics of being simple in structure, being capable of being repeatedly used and the like.

Description

technical field [0001] The patent of this invention relates to a method for controlling the breakage mode of rock or concrete. Background technique [0002] Static crushing agent is a new type of material that utilizes material expansion properties to crush brittle media. It is widely used in crushing concrete and rock brittle materials. Static crushing has the characteristics of no shock wave, no vibration, no flying stones, no noise, no harmful gas and no pollution. Etc. The crushing purpose is different, and the crushing mode of the crushed body is also different. In the demolition of the temporary concrete structure, the crushed body needs to be broken into multiple small pieces in the shape of a plum blossom or a mesh, and the pressure on the roof of the coal seam should be relieved and the penetration of the coal seam should be improved. In permanent engineering applications, it is necessary to control the direction of crack propagation to improve crushing efficiency ...

AI Technical Summary

Problems solved by technology

Since concrete and rock are heterogeneous materials, during the crushing process, cracks in other directions are prone to appear in addition to the main cracks on the drilling line, and the crushing mode is not easy to control. In the broken mode, the general practice is to conduct dense drilling, but it will greatly increase the workload and construction cost

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