NPR anchor cable shear failure simulation experimental device and experimental method
A technology for simulating experimental device and shear failure is applied in the field of NPR anchor cable shear failure simulation experimental device, which can solve the problems of difficulty in simulating the effect of the constant resistance device of NPR anchor cable, and inability to obtain the shear resistance effect of NPR anchor cable. Achieve the effect of novel structure, preventing shear damage and strong characteristics
Active Publication Date: 2022-07-12
HOHAI UNIV
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Problems solved by technology
The existing anchor cable shear research only simulates the actual force of the roadway surrounding rock on the anchor cable under the action of ordinary anchor cables. It is difficult to simulate the effect of the NPR anchor cable constant resistance device in actual engineering, and it is impossible to obtain accurate NPR anchor cable Anti-shear effect
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Embodiment Construction
[0018] Attached below Figure 1-2 The technical solution of the present invention is further described.
[0019] like figure 1 The illustrated experimental device for simulating shear failure of NPR anchor cables includes a base 1, a top plate 2 and a steel pipe 3 located in the middle for support.
[0020] A tensioning device and a displacement sensing device are arranged between the base 1 and the top plate 2. One end of the tensioning device is a fixed fixture 10, and the other end is a constant resistance body fixture 11. Four clamps are used between the fixing fixture 10 and the constant resistance body fixture 11. Steel pipe fixed connection.
[0021] Both the fixing fixture 10 and the constant resistance body fixture 11 are provided with holes 18 arranged laterally and facing each other.
[0022] The constant resistance body clamp 11 is connected to a hydraulic device for applying prestress.
[0023] The base 1 is provided with a slide rail 13 .
[0024] The lower ...
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The invention discloses an NPR anchor cable shear failure simulation experiment device, which comprises a base, a top plate and a steel pipe located in the middle for support. A tensioning device and a displacement sensing device are arranged between the base and the top plate. One end of the device is a fixed fixture, and the other end is a constant resistance body fixture. The fixed fixture and the constant resistance body fixture are fixedly connected by four steel pipes, and both the fixed fixture and the constant resistance body fixture are horizontally arranged and connected. The hole, the constant resistance body clamp is connected to the hydraulic device for applying the prestressing force. The invention has strong pertinence, strong characteristics, novel structure and convenient operation, can fully simulate and study the shear failure resistance of NPR anchor cables, and can accurately measure the shear damage of NPR anchor cables under the shearing action of surrounding rock. Shear resistance, the use of experimental results can effectively verify the shear failure occurred in practical engineering applications, and can provide scientific basis for the application of mine support, tunnel support, slope support and hydraulic engineering and other fields.
Description
technical field [0001] The invention belongs to the technical field of coal mine roadway support, and in particular relates to an NPR anchor cable shear failure simulation experiment device and an experiment method. Background technique [0002] In recent years, with the deepening of the mining depth of coal mines, the intensity, damage degree and frequency of rock bursts in coal mines have shown a sharp increase. The existing support materials cannot meet the requirements of roadway protection under the action of impact force. Due to the special mechanical properties of Poisson's ratio materials, combined with the requirements of large deformation control of downhole roadway impact, a new type of high constant resistance and large deformation NPR anchor cable with negative Poisson's ratio effect has been developed. Under the condition of sliding and tensile deformation, it maintains a constant resistance of about 350kN, and under external force, it can absorb deformation en...
Claims
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IPC IPC(8): G01N3/24G01N3/06G01N3/04
CPCG01N3/24G01N3/06G01N3/068G01N3/04G01N2203/0025G01N2203/04G01N2203/0641G01N2203/0676
Inventor 朱淳孟庆祥刘瑾窦智石崇乐慧琳
Owner HOHAI UNIV