Failure mechanism and safety control technology of a composite strata roadway in deep and soft rock masses: a case study
文献类型：期刊论文
| 作者 | Zhao, Chengwei1,2; Zhou, Hui1,2; Sun, Xiaoming3,4; Zhang, Yong3,4; Miao, Chengyu3,4; Wang, Jian3,4 |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 21期号:7页码:2427-2444 |
| 关键词 | 3DEC Composite strata roadway Soft rock NPR bolt and cable Asymmetric large deformation |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-024-8629-5 |
| 英文摘要 | The construction of coal mines often encounters deep composite soft rock roadways, which is characterized by significant deformation and poor stability. To deeply study the failure mechanism and large deformation challenges of a composite strata roadway in deep and soft rock masses, a numerical model of 3DEC tetrahedral blocks was established based on the method of rock quality designation (RQD). The results showed that original support cannot prevent asymmetric failure and large deformation due to the adverse geological environment and unsuitable support design. According to the failure characteristics, a coupling support of "NPR bolt/cable + mesh + shotcrete + steel pipe" was proposed to control the stability of the surrounding rock. The excellent mechanical properties of large deformation (approximately 400 mm) and high constant resistance force (bolt with 180 kN; cable with 350 kN) were evaluated by the tensile tests. The numerical results showed that the maximum deformation was minimized to 243 mm, and the bearing capacity of the surrounding rock of the roadway was enhanced. The field test results showed that the maximum deformation of the surrounding rock was 210 mm, and the forces of the NPR bolt and cable were stable at approximately 180 kN and 350 kN, respectively. This demonstrated the effectiveness of the coupling support with the NPR bolt and cable, which could be a guiding significance for the safety control of large deformation and failure in deep composite soft rock roadways. |
| 资助项目 | National Natural Science Foundation of China[51874311] ; National Natural Science Foundation of China[52174096] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001265559200017 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42438]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Hui; Sun, Xiaoming |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China 4.China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Chengwei,Zhou, Hui,Sun, Xiaoming,et al. Failure mechanism and safety control technology of a composite strata roadway in deep and soft rock masses: a case study[J]. JOURNAL OF MOUNTAIN SCIENCE,2024,21(7):2427-2444. |
| APA | Zhao, Chengwei,Zhou, Hui,Sun, Xiaoming,Zhang, Yong,Miao, Chengyu,&Wang, Jian.(2024).Failure mechanism and safety control technology of a composite strata roadway in deep and soft rock masses: a case study.JOURNAL OF MOUNTAIN SCIENCE,21(7),2427-2444. |
| MLA | Zhao, Chengwei,et al."Failure mechanism and safety control technology of a composite strata roadway in deep and soft rock masses: a case study".JOURNAL OF MOUNTAIN SCIENCE 21.7(2024):2427-2444. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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