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Testing apparatus and method capable of realizing impacting rock burst visualization observation

A test device and rockburst technology, which is applied in the field of engineering tests, can solve the problems of failure surface stress, strain, displacement invisible, etc., and achieve the effect of simple device and high operability

Inactive Publication Date: 2018-12-07
南京科兴新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a test device and method that can realize the visual observation of impact rockburst damage in view of the deficiency of the background technology, and solve the problem that the stress, strain and displacement of the failure surface are invisible during the impact rockburst damage process , to achieve the purpose of visual observation of rockburst damage process

Method used

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  • Testing apparatus and method capable of realizing impacting rock burst visualization observation

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Embodiment 1

[0046]Step 1: Slowly pour the prepared mixture of mineral oil and silicon powder into the mold with a small spoon, and shake the mold lightly during the pouring process to make it evenly distributed. The mold is an open square, and the size of its inner wall is 250mm×250mm×250mm. Before the solid-liquid mixture has initial setting strength, insert one end of the thin steel sheet coated with vaseline into the solid-liquid mixture from the mold opening. After the molding is completed, use a vacuum pump to evacuate the transparent rock 4 test until there are no air bubbles on the surface of the sample. After standing in the laboratory for one day, slowly pull out the thin steel sheet, remove the formwork, and prepare the transparent rock 4 with the prefabricated structural surface 6 . The refractive index of transparent rock 4 in this example is 1.477. A drill bit with a diameter of 30 mm is selected to turn a hole in the center of the X-direction perpendicular to the transpare...

Embodiment 1

[0051] Embodiment 1 is to carry out the research of impact rock mass rockburst process under the unidirectional stress of transparent rock 4 gradually reduces, other two-directional stress is constant, and for the research of rock mass rockburst process under the bidirectional stress reduction, can be in the embodiment On the basis of 1, change the implementation of step 3. Control the hydraulic jack 5, the X-direction servo actuator 11, and the Y-direction servo actuator 14 through the computer 1 to slowly apply a three-dimensional stress of 100 MPa to the transparent rock 4. After keeping the stress state constant for 1 hour, adjust the X through the computer 1. Slowly reduce the X-direction stress and Y-direction stress to the servo actuator 11 and the Y-direction servo actuator 14, each time synchronously reducing 20MPa, with an interval of 30min, until the transparent rock 4 undergoes obvious impact rockburst damage, stop the test, During the test, the data acquisition sy...

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Abstract

The invention discloses a testing apparatus and method capable of realizing impacting rock burst visualization observation. The testing apparatus comprises a load system, a data acquisition system andtransparent rock. The load system is composed of a hydraulic jack, a loading rod, a loading plate, an X direction servo actuator and a Y direction servo actuator, wherein the loading plate is connected with the loading rod; the data acquisition system is composed of a laser, a CCD (Charge Coupled Device) camera and a computer; and a reserved hole is formed in the transparent rock. According to the testing apparatus and method disclosed by the invention, the problem of invisible stress, strain and displacement on the failure surface in the rock burst process can be solved, the visualization observation in the rock burst process is realized, and the testing apparatus is simple and high in economic feasibility.

Description

technical field [0001] The invention relates to the technical field of engineering tests, in particular to a test device and method capable of realizing visual observation of impact rockburst damage. Background technique [0002] Deep mining rock mass is in a complex mechanical environment of high ground stress, high ground temperature, high karst water pressure and long-term engineering disturbance. It is a typical project of multi-directional media and multi-field coupling. Catastrophic catastrophe is a nonlinear dynamic process under the interaction of multiphase media and multifield coupling. Generally, rockburst can be divided into two types: strain rockburst and impact rockburst. Impact rockburst refers to the joint action of static load and impact load on deep rock and soil. Research on its mechanical model and dynamic catastrophe mechanism It is one of the important problems in the field of rock mechanics to propose effective prediction and prevention methods. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/12
CPCG01N3/02G01N3/12
Inventor 不公告发明人
Owner 南京科兴新材料科技有限公司
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