Instrument for measuring rock point load strength and structural surface frictional angle in field

Abstract

The invention discloses an instrument for measuring rock point load strength and a structural surface frictional angle in the field. The instrument comprises a lower bottom plate and an upper bottom plate, wherein support columns are mounted between the lower bottom plate and the upper bottom plate, and a turbine reducer is mounted on the upper bottom plate and connected with a storage hand wheel and a screw; a slider is mounted on the support columns, and the screw is connected with a connecting block which is connected with the slider; a rock point load strength measuring device or a rock structural surface frictional angle measuring device is mounted between the connecting block and the lower bottom plate. By means of the instrument for measuring rock point load strength and the structural surface frictional angle in the field, the weight of an existing rock point load instrument is reduced substantially, measurement parameters of the instrument are directly stored and transmitted without manual recording, requirements of rock point load strength measurement in the field for low weight and intelligence of the instrument are met, the way of measuring the rock structural surface frictional angle through visual inspection at the site is avoided, and the function of measurement of the structural surface frictional angle is increased.

Description

technical field [0001] The invention relates to an instrument for measuring rock point load strength and structural surface friction angle in the field. Background technique [0002] Point load test is a very important index for rock mass classification (RMR, CSMR, etc.) research and strength parameters in rock mass engineering. Rock stability analysis plays a very important role. At the same time, the point load test is not only simple and fast, it can carry out on-site testing in the original state, it has the advantages of less man-hours, low cost and convenience for a large number of tests. Characteristics of the test. Mechanical parameters such as cohesive force and friction angle of rock mass structural surfaces are often of concern to researchers and engineers. [0003] The rock point load strength test method was recommended by the Test Method Committee of the International Society of Rock Mechanics (ISRM) in 1972, and was revised in 1984. The test is to place th...

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Problems solved by technology

[0007] The object of the present invention is to provide an instrument for measuring the rock point load strength and structural surface friction angle in the field, which can greatly reduce the weight of the existing rock point load instrument, enable the instrument measurement parameters to be directly stored and transmitted, without manual recording, and meet the requirements of field rock measurement. Point load strength requires portable and intelligent instruments. At the same time, it solves the practice of measuring the friction angle of the rock structure surface by visual inspection on site, and increases the function of measuring the friction angle of the structure surface.

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