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Parametric Study on the Ground Control Effects of Rock Bolt Parameters under Dynamic and Static Coupling Loads
- Source :
- Advances in Civil Engineering, Vol 2020 (2020)
- Publication Year :
- 2020
- Publisher :
- Hindawi, 2020.
-
Abstract
- Dynamic and static coupling loads (DSLs) are one of the most common stress environments in underground engineering. As the depth of a roadway increases over the life of a mine, the static load of the ground stress field increase multiplies, and the cyclic operation at the working face releases a large amount of dynamic energy. Therefore, deep roadways easily induce dynamic disasters during production. In this paper, a deep roadway numerical model was built with FLAC3D to test the deep roadway under DSLs and was simulated with 16 different support designs. The ground stability in each support condition was examined and compared in terms of the ground deformation and scope of failure. The underlying support mechanism was further analyzed with numerical modeling in view of the deformation in the surrounding rock mass induced by variations in the support parameters. The results show that shortening the bolt spacing is an effective measure to control the deformation of surrounding rock whatever DSLs or static load. Under static load, the larger the anchoring length is, the more stable the surrounding rock is. Under DSLs, end grouting length (S = 600 mm) and full grouting length (S = 1800 mm) can effectively control the deformation of surrounding rocks and enhance the stability of surrounding rocks. The results contribute to the design of supports in the field of underground coal mines and provide a basis for determining the reasonable support scheme for roadways.
- Subjects :
- Rock bolt
Article Subject
0211 other engineering and technologies
Anchoring
02 engineering and technology
Deformation (meteorology)
Engineering (General). Civil engineering (General)
010502 geochemistry & geophysics
01 natural sciences
Stress (mechanics)
Stress field
Coupling (piping)
Geotechnical engineering
TA1-2040
Rock mass classification
Geology
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Civil and Structural Engineering
Parametric statistics
Subjects
Details
- Language :
- English
- ISSN :
- 16878086
- Database :
- OpenAIRE
- Journal :
- Advances in Civil Engineering
- Accession number :
- edsair.doi.dedup.....d824566ec0424a15abf32d999f00320c
- Full Text :
- https://doi.org/10.1155/2020/5247932