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Systems and methods for studying blast stress wave interaction mechanisms

A technology of explosion stress and mechanism, which is applied in the direction of educational appliances, instruments, teaching models, etc., can solve the problem that the effect of explosion stress wave is less than the mutual superposition of explosion stress wave

Active Publication Date: 2018-04-10
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few domestic experiments and researches on the effect of the explosion stress wave in the crack initiation stage and the mutual superposition of the explosion stress wave.

Method used

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  • Systems and methods for studying blast stress wave interaction mechanisms
  • Systems and methods for studying blast stress wave interaction mechanisms

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Experimental program
Comparison scheme
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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with specific embodiments.

[0023] refer to Figure 1-2 , the system for studying the interaction mechanism of explosion stress waves includes a bracket 12, an explosive charge 8, a charge seal cover 9, an explosive 10, a test piece 11, a fixing bolt 7, a test piece fixture 6, a detonation probe 5, and an explosive charge 8 It is a hollow cylinder with one end closed, the outer diameter of the cylinder is the same as the diameter of the test piece 11 blast hole, the height of the cylinder is the same as the thickness of the test piece 11, and the explosive can be installed inside the cylinder; the diameter of the charge sealing cover 9 is the same as the inner diameter of the explosive charge 8 Same, there is a small round hole in the center of the circle, and the detonating probe 5 can pass through the small round hole; the specimen fixture 6 is equipped with a fixing bolt 7 for fixing the specimen...

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Abstract

The present invention discloses a system and method used for researching an explosive stress wave interaction mechanism. The system is characterized in that a time-delay controller is utilized to send out trigger signals to control a multi-channel pulse igniter, the multi-channel pulse igniter ignites the explosives in explosive charges after receiving the trigger signals, and the explosive explosion generates the explosive stress waves to act on a tested member; the time-delay controller sends out at least two trigger signals simultaneously or orderly to control the multi-channel pulse igniter to ignite the plurality of explosive charges simultaneously or orderly, so that the different explosive stress waves are generated in the tested member simultaneously or orderly; after receiving the trigger signals, the multi-channel pulse igniter discharges immediately at the tip of an igniting probe connected with a signal line to ignite the explosives in the explosive charges to thereby generate the explosive stress waves. The positions of the explosive charges and the explosive quantity can be changed to thereby change the intensities of the explosive stress waves and the superposition situation among different stress waves, so that an experiment loading system has a great flexibility, and can satisfy different experiment requirements.

Description

technical field [0001] The invention relates to a blasting test experiment system in the field of fracture mechanics research, in particular to a system and method for studying the interaction mechanism of blast stress waves. Background technique [0002] Drilling blasting, smooth blasting, and directional fracture controlled blasting techniques are widely used in open-pit mines and deep mines, road construction, tunnel and shaft excavation. However, the specific process of rock breaking by blasting has not yet been fully understood. It is generally believed that the initial cracks formed in the rock mass are caused by the explosion stress wave, and then the explosive gas penetrates into the cracks and further expands the cracks caused by the stress wave under the action of static pressure. Explosion is an extremely complicated process. The transient and destructive nature of the blasting process makes the observed blasting effect often be formed under the combined action o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B25/00
CPCG09B25/00
Inventor 岳中文王煦宋耀邱鹏别超军
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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