Deformation and Failure Mechanism of Surrounding Rock in Deep Soft Rock Tunnels Considering Rock Rheology and Different Strength Criteria

被引：31

作者：

Jing, Wei ^{[1
,2
,3
,4
]}

Zhou, Jie ^{[2
]}

Yuan, Liang ^{[1
,4
]}

Jin, Rencai ^{[3
]}

Jing, Laiwang ^{[1
]}

机构：

[1] Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & C, Huainan 232001, Peoples R China

[2] Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Anhui, Peoples R China

[3] China MCC17 Grp Co LTD, Civil Engn Post Doctoral Res Workstn, Maanshan 230000, Anhui, Peoples R China

[4] Anhui Univ Sci & Technol, Civil Engn Post Doctoral Res Stn, Huainan 232001, Peoples R China

来源：

ROCK MECHANICS AND ROCK ENGINEERING | 2024年 / 57卷 / 01期

关键词：

Deep soft rock tunnel; Rock rheology; Strain-softening model; Long-term strength; Zoning mechanism of surrounding rock; Elastic-creep modulus;

D O I：

10.1007/s00603-023-03565-z

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The long-term stability control of surrounding rock of deep high-stress soft rock tunnel has always been the research hotspot and difficulty of underground engineering. With the continuous increase of the number of ultra-kilometer mines, reasonable support design has an important impact on the efficient and safe production and sustainable development of deep coal resources. In view of the above problems, the formation mechanism of surrounding rock deformation zoning of deep high-stress soft rock tunnel considering rock rheology is analyzed, a three-stage strain-softening model considering rock rheology is established, and the concept of elastic-creep modulus is proposed based on this model. Combined with the rheological influence of rock and the test method of long-term strength of surrounding rock, the elastic-plastic solutions of surrounding rock of deep tunnel based on Mohr-Coulomb and Drucker-Prager strength criteria are derived, and the formulas for solving the radius of deformation zones of tunnel-surrounding rock are calculated. Meanwhile, combined with an engineering example, the radius of deformation zones of tunnel-surrounding rock based on different strength criteria and rock rheology is calculated and compared, and the correctness and superiority of this theory are verified by the field measured results. In addition, the influence of rock mechanical parameters on the range of deformation zones of tunnel-surrounding rock under different mechanical models is assessed. This work can provide guidance for long-term stability evaluation, support design, and disaster prevention of deep soft rock tunnels. A novel three-stage strain softening model considering rock rheology was established.Deformation mechanism of surrounding rock of deep roadway considering rheology.The elastic-plastic solution based on different strength criterion and rock rheology.Comparison and analysis of elastoplastic solutions under different strength criteria.The influences of rock mechanics parameters on the range of deformation zones.

引用

页码：545 / 580

页数：36

共 77 条

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