Experimental loading system and method for studying the mechanism of moving crack interaction

A technology for loading systems and cracks, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of less interaction between moving cracks, and achieve the effects of easy operation, guaranteed reliability, and great flexibility

Active Publication Date: 2018-04-24
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few experiments and researches on the interaction of moving cracks in China at present.

Method used

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  • Experimental loading system and method for studying the mechanism of moving crack interaction
  • Experimental loading system and method for studying the mechanism of moving crack interaction
  • Experimental loading system and method for studying the mechanism of moving crack interaction

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Experimental program
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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with specific embodiments.

[0027] refer to Figure 1-4 , the experimental loading system for studying the interaction mechanism of moving cracks includes a support 12, an impact head 8, a conduit 6, a specimen 11, a conduit support 9, a specimen support 10, a bolt a13, a bolt b14, an explosive charge 7, and the main body of the conduit 6 is Cylindrical steel pipe, one end is not closed, the other end is closed, the closed end has a small circular hole, the detonation probe 5 can pass through this small hole, and one side of the cylinder has a rectangular member with a round hole for fixing Conduit 6, the diameter of the circular hole on the rectangular member is the same as the diameter of the conduit support 9, the circular hole of the rectangular component passes through the conduit support 9, the conduit 6 is fixed by the bolt b14, the bottom of the conduit support 9 is fixed on the support 12; ...

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PUM

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Abstract

The invention discloses an experiment loading system and method for researching the movement crack interaction mechanism.A time-prolonging controller is utilized to send out trigger signals to control a multi-channel pulse ignitor, the multi-channel pulse ignitor detonates explosive in catheter cartridge bags after receiving the trigger signals, impact force generated by explosion of the explosive acts on an impact head, the impact head impacts a test piece under the action of the blast load, and the test piece is cracked and generates movement cracks.The time-prolonging controller can send out a plurality of trigger signals simultaneously or sequentially to control the multi-channel pulse ignitor to detonate multiple cartridge bags simultaneously or sequentially, and the test piece can generate two or more movement cracks simultaneously or sequentially.The experiment loading system can change positions where the movement cracks are generated in the test piece and the initial expansion direction of the cracks by changing the relative position of the impact head and the test piece, great flexibility is achieved, and different experiment requirements can be met.

Description

technical field [0001] The invention relates to a blasting test experimental system in the field of fracture mechanics research, in particular to an experimental loading system and method for studying the interaction mechanism of two or more moving cracks. Background technique [0002] Smooth surface blasting and directional fracture controlled blasting techniques are widely used in road construction, open pit and deep mine, tunnel and shaft excavation. In actual engineering, due to the application of delayed detonation technology and the accuracy of pyrotechnics, there must be slight errors in the detonation time of different blast holes, so there must be motion cracks produced by the first blast hole and the rear blast hole. The interaction of moving cracks and the interpenetration of moving cracks. [0003] In recent years, with the continuous progress of science and technology, some foreign scientific research workers have conducted some research on the expansion of mov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/313
CPCG01N3/313
Inventor 岳中文王煦宋耀邱鹏陈程郭超
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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