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Slip-type rockburst shear test system under dynamic disturbance

A dynamic disturbance and shear test technology, applied in the direction of using stable shear force to test material strength, using stable tension/pressure test material strength, soil material test, etc., can solve the limitation of test monitoring and analysis, measurement Limited ability and other problems, to achieve the effect of good strain perception ability, meeting test needs, and flexible layout

Active Publication Date: 2020-10-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For indoor tests, on the one hand, traditional structural surface friction test equipment is mostly static (quasi-static) test equipment, which cannot simulate dynamic disturbances or has limited disturbance capabilities. For example, due to technical and other reasons, most conventional servo testing machines have a disturbance frequency of around 5HZ. The upper limit of the low-frequency disturbance, while the blasting stress wave, seismic wave from rock mass instability, vibration wave caused by mechanical drilling or vibration of heavy equipment are mostly far beyond this range, the data obtained by these test equipment often cannot be better Reproduce the actual situation in the project; on the other hand, affected by many factors such as the difficulty of monitoring, the single-point measurement methods such as strain gauges and displacement gauges are still mainly used at present, and the measurement capability is limited, which limits further monitoring and analysis of the test

Method used

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  • Slip-type rockburst shear test system under dynamic disturbance
  • Slip-type rockburst shear test system under dynamic disturbance
  • Slip-type rockburst shear test system under dynamic disturbance

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Embodiment Construction

[0026] The sliding rockburst shear test system under the action of dynamic disturbance involved in the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1 and 2 As shown, the sliding rockburst shear test system 10 under dynamic disturbance has a support frame 11 , a vertical loading device 12 , a horizontal loading device 13 , a shear box member 14 , a data acquisition unit 15 , and a control unit 16 .

[0028] The vertical loading device 12 is installed on the top of the support frame 11, and is used to apply a vertical load to the sample S in the shear box member 14, and can perform a fixed normal force shear test, a normal disturbance load test, etc., and it includes a mounting frame 12a, Electromagnetic vibrator 12b and vertical dynamic pressure sensor 12c. The installation frame 12a can move back and forth in the horizontal direction along the slide rails on the support frame and be positioned. The ...

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Abstract

The invention provides a sliding rockburst shear test system under dynamic disturbance. The sliding rockburst shear test system is characterized by comprising the following parts: a shear box member;a vertical loading device which applies a vertical load to the sample and includes an electromagnetic exciter applying an excitation load and a vertical dynamic pressure sensor disposed at the end ofthe electromagnetic exciter; a horizontal loading device including a horizontal loader and a horizontal pressure sensor disposed at the end of the horizontal loader; a data acquisition unit includinga dynamic displacement sensor set on the electromagnetic exciter, a horizontal displacement sensor disposed on the horizontal loader, distributed fiber grating sensors uniformly disposed on a portionto be tested of the sample in a net structure for performing real-time dynamic strain measurement on the portion to be tested, and a CT real-time scanning system that faces the shear box member for scanning the sample in the box and obtaining crack information of the sample; and a control portion.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering indoor mechanics tests, and in particular relates to a sliding type rockburst shear test system under the action of dynamic disturbance. Background technique [0002] With the development of underground space and resources, the depth involved in modern geotechnical engineering continues to increase. Due to the "three high" state of deep rock mass (high ground stress, high temperature, high osmotic pressure) and its joint characteristics, a large number of rock mass dynamic disasters will occur during engineering operations. One of the hotspots of experts and scholars. [0003] Under dynamic loading and unloading disturbances such as blasting excavation, stress concentration and high-stress environment changes will occur near the structural surface of the deep rock mass. At the same time, the disturbance will also affect the mechanism of crack closure and propagation. These new ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N3/24G01N3/08G01N23/046G01B11/16
Inventor 李新平王刚刘婷婷汪洋徐坤宋凯文黄明智李毅阳
Owner WUHAN UNIV OF TECH
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