Method and device for measuring pressure resistance and compression modulus of discrete materials

Abstract

The invention provides a method and a device for measuring pressure resistance and compression modulus of discrete materials. The device comprises a body and a control device, the body comprises a body top, a body base and vertical supporting columns, and a rigid pressure column is connected with the body top through a load sensor. A discrete material storage bin is provided with an upper opening which allows the rigid pressure column to pass through, at least one side wall of the discrete material storage bin is provided with a plurality of through holes, guide rods are mounted in the through holes and capable of sliding relative to the through holes, a slide retaining plate is mounted in the discrete material storage bin, and a pressure sensor is mounted between the slide retaining plate and the side wall with the through holes. A driving device which is a linear reciprocation mechanism is mounted on the body base, and the discrete material storage bin is mounted on the driving device which is capable of lifting the discrete material storage bin. One end of a position recorder is connected with the body base, and the other end of the position recorder is connected with the discrete material storage bin. By the method and the device for measuring pressure resistance and compression modulus of the discrete materials, precision and effectiveness in measurement of the pressure resistance and the compression modulus of the discrete materials are realized.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to the technical field of geotechnical performance measurement and analysis, and more specifically to a device for measuring the compressive resistance and compressive modulus of dispersed bodies and a method for measuring using the device. Background technique [0002] A bulk is a mechanical mixture of many solid particles of different shapes and sizes. Usually manifested as a variety of loose materials, such as sand piles, pebble piles, grain, coal piles, etc. When an accident occurs underground in a coal mine and the roadway collapses, the roof and surrounding rock are destroyed to form a caving body that fills the entire roadway. Dispersions with different particle sizes and even mixtures of water, mud, coal, stone, etc. In a limited space, the collapsed body is limited by the rocks on both sides, and its stress characteristics and stress state are different f...

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Problems solved by technology

[0003] In soil mechanics, there are many research methods on the compression resistance and compressive modulus of soil, but the research on the compression resistance of rock and coal bulk is rare, especially when there are lateral constraints.

The compression resistance and compressibility of bulk are important parameters of engineering mechanics. They are widely used in the study of the mechanical properties of the collapsed body after the damage of the coal mine underground roadway and the research on the bearing capacity of the foundation of the construction project, especially in the fields filled with the collapsed body. In a full underground tunnel, how to use the compressive capacity and compressibility of the collapsed solids to quickly excavate the rescue channel is the focus of research. Therefore, the study of the compressive properties and The compressive modulus has important scientific significance, but there is no device for measuring the compressive resistance and compressive modulus of bulk particles at present. Most of the experimental instruments are only suitable for materials with obvious structural characteristics such as concrete and cement, and then need a A device for mechanical analysis and research on bulk, especially for testing its compression resistance and compressive modulus

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