Test method for abrasiveness of rock to tbm hob cutter rings
A testing method and abrasiveness technology, which is applied in the direction of testing wear resistance, weighing by removing certain components, etc., can solve the problem of abrasiveness of TBM hob cutter ring, measurement error of steel needle tip width, and incomparable sexual issues
Active Publication Date: 2019-07-12
CENT SOUTH UNIV
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Problems solved by technology
When the above-mentioned test for determining the abrasiveness of rock is used to evaluate the abrasiveness of rock to the TBM hob cutter ring, there will be the following problems: the material and performance of the steel needle used are not comparable to those of the actual TBM hob cutter ring; The relative movement mode and relative movement speed between the steel needle and the tested rock sample are not comparable to the relative movement mode and relative movement speed between the TBM hob cutter ring and the rock under actual working conditions; There will be a large error in the width measurement of the steel needle tip
Therefore, the Cerchar abrasiveness index cannot accurately reflect the abrasiveness of the rock to the TBM hob cutter ring
Method used
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[0036] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0037] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0038] The invention provides a method for testing the abrasiveness of a rock to a TBM hob cutter ring, such as figure 1 As shown, the method includes:
[0039] S101, processing the rock to be test...
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Abstract
The invention discloses an abrasiveness testing method of a rock on a tunnel boring machine (TBM) disc cutter ring. The method comprises the following steps: the rock to be tested is processed and produced into a rock sample of a preset shape and dimension; a material which is identical to a material of the TBM disc cutter ring is processed in order to obtain a disc cutter ring sample, and a heat treatment operation which is identical to the operation of the TBM disc cutter ring is carried out for the disc cutter ring sample; the mass of the disc cutter ring sample after the heat treatment is determined, and the mass is used as a first mass; friction is carried out between the disc cutter ring sample after the heat treatment and the rock sample; the mass of the disc cutter ring sample after the friction is determined, and the mass is used as a second mass; an abrasiveness coefficient of the rock sample to the disc cutter ring sample is determined, and the abrasiveness coefficient is used as the abrasiveness coefficient of the rock to be tested on the TBM disc cutter ring. The friction process between the disc cutter ring sample and the rock sample is approached to the process that the TBM disc cutter ring breaks the rock in a working condition, that is an actual working condition is simulated, so that reliability and accuracy of the testing method are improved.
Description
technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a method for testing the abrasiveness of a rock on a TBM hob cutter ring. Background technique [0002] A full-face tunnel boring machine (Tunnel Boring Machine, TBM) is a tunnel boring machine specially used for excavating tunnels in hard rock formations. During TBM excavation, rocks are mainly rolled and crushed by hobs installed on the TBM cutter head. When the TBM hob rolls and crushes rocks, the hob cutter ring is the part that directly contacts and acts on the rock. The wear resistance of the hob cutter ring directly affects the rock-breaking efficiency and service life of the hob. However, the wear resistance of the hob cutter ring not only depends on the performance of the hob cutter ring itself, but also is affected by the characteristics of the rock it acts on. Among them, the abrasiveness of the rock is an extremely important factor. [0003] In the field ...
Claims
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IPC IPC(8): G01N3/56G01N5/04
CPCG01N3/56G01N5/04
Inventor 夏毅敏毛晴松张旭辉吴才章丛国强杨端郭犇
Owner CENT SOUTH UNIV