A device and method for making prefabricated fissures in standard rock specimens
A technology for rock test pieces and manufacturing devices, which is applied in the preparation of test samples, etc., can solve the problems of crack geometric size restrictions, crack size restrictions, and the preparation of unusable cracks, etc., to achieve easy disassembly and assembly, and simple manufacturing process , the effect of improving work efficiency
Active Publication Date: 2022-03-22
SHANDONG UNIV
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Problems solved by technology
[0004] "Journal of Rock Mechanics and Engineering" No. 9, 2017 introduced a method to prepare double fractures in sandstone, but this method cannot be used to prepare fractures in standard specimens and cannot prepare through fractures
[0005] "Journal of Geotechnical Engineering" No. 12, 2014 introduced a single-crack standard specimen preparation method, using a mixture of water, gypsum and cement to prepare the specimen, and inserting stainless steel sheets into the unsolidified material mixture to form open cracks , but this method cannot prepare the standard fracture specimen of the original rock, and cannot obtain the real mechanical parameters of the original rock
[0006] "Journal of Rock Mechanics and Engineering" No. 6, 2008 introduced a method for making a three-dimensional fracture group. The mica sheet is fixed in the mold as a prefabricated fracture, and the specimen is made by pouring a new type of unsaturated polyester resin material, but the specimen is not the original one. rock, which is quite different from the actual rock mass, and the real mechanical parameters cannot be obtained
[0007] "Journal of Rock Mechanics and Engineering" No. 3, 2007 introduced a method for making open surface cracks in gabbro, using a circular cutting tool with a diameter of 20mm to cut open surface cracks on the surface of the sample, but Fissure geometry is limited and cannot cut through fissures
[0008] The invention patent with the application number 201510814787.X introduces a method for making three-dimensional jointed and fractured cylindrical rock samples. High-pressure water jets are used to cut jointed and fractured cuboid-shaped regular rock blocks, but this method cannot be used for cylindrical standard rock samples. Parts for the preparation of cracks of arbitrary shape
[0009] The invention patent with the application number of 201720749290.9 introduces a device for making cracks on the surface of standard rock specimens. This device cannot realize the production of through-cracks, and has great restrictions on the size of cracks.
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[0046] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0047] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof;
[0048] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present i...
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Abstract
The invention relates to a device and method for making prefabricated cracks on standard rock test pieces. The device is mainly composed of a cutting system, a drive system and a table system. The standard rock test piece is installed in a test piece cutter of the table top system. Crack positioning consists of a half-open steel mold and a cutting angle adjuster. The cutting system is used for crack cutting of rock specimens. The driving system provides driving force for the cutting system. The cutting system and the driving system are installed on the table system. The invention can realize the preparation of inclined cracks and penetrating cracks on the surface of standard rock test pieces, can adjust the geometric size and cutting speed of the cracks, has simple structure, simple manufacturing process, high degree of mechanization, and accurate preparation of cracks. The invention can be widely used in hydropower, Mechanical testing of jointed and fractured rocks in the fields of transportation, energy and mining engineering.
Description
technical field [0001] The invention relates to a device and method for making cracks in rock test pieces, in particular to a device and method for making prefabricated cracks in standard rock test pieces in mechanical tests. Background technique [0002] With the rapid development of society and the continuous increase of people's needs, the construction of underground projects in various fields such as energy, transportation, water conservancy, and national defense continues to go deep, and the deep rock mass structure is complex. Many types of defects such as cracks, fissures, joints, and beddings are formed inside the rock due to structural and atmospheric weathering, which directly affect the physical and mechanical properties of the rock, and bring great difficulty and uncertainty to the stability control of underground engineering. Certainty. Grasping the change law of the mechanical properties of fractured rock mass has very important guiding significance for the st...
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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 张强勇张振杰李术才向文尹相杰李帆丁炎志王斌
Owner SHANDONG UNIV
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