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单轴压缩下红砂岩岩爆倾向性尺寸效应研究

Study on the size effect of rock burst tendency of red sandstone under uniaxial compression.

作者信息

Chen Feng, Du Jinyang, Lv Jinguo, Tang Chun'an, Pan Yishan

机构信息

School of Mechanics and Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning, China.

Institute of Rock Instability and Seismicity Research, Dalian University of Technology, Dalian, 116000, Liaoning, China.

出版信息

Sci Rep. 2024 Jul 16;14(1):16402. doi: 10.1038/s41598-024-67464-1.

DOI:10.1038/s41598-024-67464-1
PMID:39014080
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11252440/
Abstract

The study of rock burst tendency of rock masses with different sizes plays a key role in the prevention of rock burst. Through theoretical analysis, it is proposed that uniaxial compressive strength and deformation modulus ratio are the key mechanical parameters affecting rock burst occurrence. In order to find out the size effect of uniaxial compressive strength and deformation modulus ratio, theoretical analysis and uniaxial compression experiment are carried out on rock samples with different heights, different cross-sectional areas and different volumes. The results show that the smaller the uniaxial compressive strength is, the larger the deformation modulus ratio is, and the more likely rock burst are to occur. On the contrary, rock burst is still not easy to generate. The uniaxial compressive strength of rock samples with different heights, different cross-sectional areas and different volumes increases with the increase of rock sample size. The deformation modulus ratio of rock samples with different heights and different volumes shows an upward trend on the whole, while that of rock samples with different cross-sectional areas shows a downward trend on the whole. The fracture forms of rock are analyzed using the energy conversion law in the process of deformation and failure for three kinds of rock with different shapes and sizes.

摘要

不同尺寸岩体的岩爆倾向性研究对岩爆防治起着关键作用。通过理论分析，提出单轴抗压强度与变形模量比是影响岩爆发生的关键力学参数。为了探究单轴抗压强度与变形模量比的尺寸效应，对不同高度、不同截面积和不同体积的岩石试样进行了理论分析和单轴压缩试验。结果表明，单轴抗压强度越小，变形模量比越大，岩爆发生的可能性就越大。相反，岩爆仍不易发生。不同高度、不同截面积和不同体积的岩石试样的单轴抗压强度随岩石试样尺寸的增大而增大。不同高度和不同体积的岩石试样的变形模量比总体呈上升趋势，而不同截面积的岩石试样的变形模量比总体呈下降趋势。利用能量转换定律，对三种不同形状和尺寸的岩石在变形破坏过程中的断裂形式进行了分析。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/42ebdc612fc8/41598_2024_67464_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/b5f635af17ff/41598_2024_67464_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/3a24053368b0/41598_2024_67464_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/314c02c602a1/41598_2024_67464_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/f046bce624e4/41598_2024_67464_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/25af/11252440/0e93631f07d2/41598_2024_67464_Fig13_HTML.jpg
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Energy monitoring and analysis during deformation of bedded-sandstone: use of acoustic emission.层状砂岩变形过程中的能量监测与分析：声发射的应用。
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Study and application on the size effect and end effect of red sandstone mechanical properties.红砂岩力学性能尺寸效应与端部效应的研究及应用
Sci Rep. 2025 Feb 8;15(1):4718. doi: 10.1038/s41598-025-88510-6.