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Experiment method for simulating different types of rock explosion

A test method and rockburst technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems that have not yet been able to realize different types of rockburst phenomena

Inactive Publication Date: 2018-09-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] To sum up, at present, most of the indoor rockburst tests are loaded with hydraulic rigidity uniformly distributed on all sides of the small size, and there is no indoor test method that can realize different types of rockburst phenomena.

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  • Experiment method for simulating different types of rock explosion
  • Experiment method for simulating different types of rock explosion
  • Experiment method for simulating different types of rock explosion

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments described here are for illustration only and do not limit the invention.

[0056] Rockburst mainly occurs in the process of concentration of tangential stress in the surrounding rock after the excavation of the underground chamber, and the tangential stress is relatively large at the wall of the cave, and decreases gradually to the interior of the surrounding rock with a certain gradient (such as figure 1 As shown), buried depth, excavation method, geological structure, etc. will all affect its distribution. In order to test and reproduce different types of rockburst processes, it is necessary to start from the mechanical characteristics of the surrounding rock of the chamber and realize it by controlling different stress concentration paths. Based on the distribution law of the tangential stress of the su...

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Abstract

The invention discloses an experiment method for simulating different types of rock explosion. The experiment method is characterized by comprising the following steps: step 1, preparing a rock explosion test sample; step 2, performing a three-direction six-side loading, single-side unloading and top gradient loading experiment method on the rock explosion test sample; step 3, choosing appropriateinitial confining pressure, loading to initial confining pressure level and then simulating a chamber excavation process through horizontal single-side unloading under the situation that load of other sides are unchanged; step 4, achieving different gradient loading purposes by controlling four groups of independent loaders at the top of the rock explosion test sample, simulating chamber tangential stress concentration and gradient loading until the rock explosion test sample is damaged; step 5, in a rock explosion test sample loading damage process, monitoring and recording an experiment process; step 6, cleansing and analyzing experiment data. The method can recognize brittle failure modes partially happened in engineering and has important theoretical and engineering significance in choosing a reasonable surrounding rock construction method and a reasonable supporting system.

Description

technical field [0001] The invention relates to a rockburst simulation test method, in particular to a test method for simulating different types of rockbursts, and belongs to the field of rock mechanics tests. Background technique [0002] In recent years, with the further development of mining, transportation, water conservancy, national defense, nuclear waste storage and other projects in the world to deep rock masses, the problem of rockburst caused by excavation and unloading of hard rock under high ground stress has become increasingly prominent. Although hundreds of years of exploration have been carried out, the diversity of rockburst phenomena and the complexity of the formation mechanism make the research results of rockburst appear to be stretched in the specific application of engineering. Rockburst is a brittle failure phenomenon of surrounding rock caused by the decrease of radial stress and the concentration of tangential stress after chamber excavation. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019G01N2203/0044G01N2203/0048G01N2203/0067G01N2203/0208
Inventor 夏元友刘夕奇祝文化吝曼卿王智德
Owner WUHAN UNIV OF TECH
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