Small-size rock abrasiveness testing device and method
A testing device and abrasive technology, applied in the direction of measuring device, testing wear resistance, strength characteristics, etc., can solve the problems of difficult to control the density of mineral particles, the mold does not have repeatability, cannot be reused, etc., to achieve reuse , Easy to prepare, easy to disassemble and replace
Pending Publication Date: 2022-02-08
WUHAN UNIV
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Problems solved by technology
But there is following weak point in this invention: one, for the particle that particle diameter is greater than 10mm steel needle sliding zone, because the irregularity of mineral particle shape after grinding, its surface non-horizontal plane, will be on the test surface when pouring into resin sample The condensed resin medium in the scratch area will affect the test results; secondly, for the particles with a particle size less than 10 mm in the sliding area of the steel needle, the connection between mineral particles and the influence of the microstructure plane cannot be considered. In addition, due to the small particle size and The shapes are different, and it is difficult to control the overall or local arrangement area density of mineral particles in the actual sliding area; thirdly, the simulated specimen can only be tested on one surface of the mineral rough, and the other surfaces of the mineral are wrapped in the resin medium and cannot be tested. At the same time, the mold is not repeatable and cannot be reused after the test
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[0044] like Figures 1 to 4As shown, a small-scale rock abrasiveness test device includes a sample mold 1. The sample mold 1 is composed of an outer casing 2 and an inner casing 3 . Both the inner casing and the outer casing are of square structure. The side wall of the inner casing 3 has a hole slightly larger than the circular plate 7, so as to penetrate the telescopic device 4, the inner casing 3 is supported by a support column 9; the support column 9 is located at the center of the bottom surface of the outer casing 2, and the inner casing 3 is used for Place the sample. The inner casing and the outer casing are fixed by filling material pouring. The size of the outer casing 2 meets the size requirements of the Cerchar standard sample, and the length, width and height are 50mm×50mm×40mm, respectively. The inner casing 3 needs to meet the scratch length requirement (10mm) of the Cerchar test. Preferably, the length, width and height are respectively 15mm×15mm×15mm. T...
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Abstract
The invention discloses a small-size rock abrasiveness testing device and method. The device comprises a sample mold, wherein the sample mold is formed by combining an outer shell and an inner shell; the inner shell is of a square structure and is supported by a supporting column; the supporting column is located in the center of the bottom face of the outer shell, and a sample is placed on the inner shell; a telescopic device is connected between the side wall of the inner shell and the opposite side wall of the outer shell; the telescopic device can support the side face of the sample through stretching and retracting. The device and the method can be used for testing the abrasiveness of the samples of which the sizes do not meet the requirements of Cerchar standard samples, such as natural mineral raw stones or soft broken rocks, comprehensively consider the influence of various mineral components and soft broken rocks on the abrasiveness of the rocks, and provide a reference standard for a TBM hob abrasion mechanism and abrasion prediction research.
Description
technical field [0001] The invention relates to the technical field of rock measurement, in particular to a small-sized rock abrasiveness testing device and method. Background technique [0002] With the rapid development of the national economy and the increasing demand for energy, my country urgently needs to build a number of deep buried long tunnels. Thanks to the process of mechanization and its advantages in safety, economy, environmental protection, and high efficiency, full-face rock tunnel boring machines (TBMs) have been increasingly used in hard rock tunnel excavation. The hob is the main component of rock breaking during TBM excavation. During the excavation, factors such as rock inhomogeneity, stratum complexity, and variability of rock mass fissures and joints will lead to changes in the stress on the tool and different forms of tool wear. As a result, the hob will be worn to different degrees every time the cutter head is excavated for a certain distance, and...
Claims
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IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/56G01N3/02
Inventor 张晓平李馨芳唐少辉王浩杰刘泉声
Owner WUHAN UNIV