Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks
In order to clarify the influence of anchor bolts on the supporting effect of the layered weak roof and surrounding rock of nonlayered roof with good integrity, the mechanical model of the roadway with nonlayered homogeneous roof and layered weak roof was established using FLAC3D. The distribution c...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/4841658 |
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| author | Chao Yuan Lei Fan Jian-feng Cui Wei-jun Wang |
| author_facet | Chao Yuan Lei Fan Jian-feng Cui Wei-jun Wang |
| author_sort | Chao Yuan |
| collection | DOAJ |
| description | In order to clarify the influence of anchor bolts on the supporting effect of the layered weak roof and surrounding rock of nonlayered roof with good integrity, the mechanical model of the roadway with nonlayered homogeneous roof and layered weak roof was established using FLAC3D. The distribution characteristics of the stress field and the displacement field of the bolt support are analyzed, and the supporting effect of the bolt on the roof of two types of roadways is studied. The research results show that when the original rock stress is not considered, the bolt support shows obvious tensile, compressive stress areas and positive and negative displacement areas in the surrounding rock of the roof of the roadway; when the original rock stress is taken into account, the tensile and compressive stress zones and the positive and negative displacement zones of the anchor support in the surrounding rock of the roof plate disappear obviously. The effect of the bolt support on the stress field and plastic area of the surrounding rock of the two types of roadway roof is not obvious. However, it has a significant effect on suppressing discontinuous deformation such as delamination and sliding between layered roof rocks. The delamination phenomenon between rock layers disappeared obviously, and the range of each numerical curve of the displacement field of the surrounding rock in the anchoring area was significantly reduced. However, the effect of the anchor support on continuous deformation control such as elastoplastic deformation of roof rock of nonlayered roadway is very limited. There is almost no change in the displacement field curve in the depth of the roof-surrounding rock. Only the shallow surrounding rock displacement field curve range has decreased. |
| format | Article |
| id | doaj-art-68f02362ffed42729d607cdf35244735 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-68f02362ffed42729d607cdf352447352025-02-03T05:53:25ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/48416584841658Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof RocksChao Yuan0Lei Fan1Jian-feng Cui2Wei-jun Wang3Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Xiangtan 411201, ChinaSchool of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaWork Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Xiangtan 411201, ChinaIn order to clarify the influence of anchor bolts on the supporting effect of the layered weak roof and surrounding rock of nonlayered roof with good integrity, the mechanical model of the roadway with nonlayered homogeneous roof and layered weak roof was established using FLAC3D. The distribution characteristics of the stress field and the displacement field of the bolt support are analyzed, and the supporting effect of the bolt on the roof of two types of roadways is studied. The research results show that when the original rock stress is not considered, the bolt support shows obvious tensile, compressive stress areas and positive and negative displacement areas in the surrounding rock of the roof of the roadway; when the original rock stress is taken into account, the tensile and compressive stress zones and the positive and negative displacement zones of the anchor support in the surrounding rock of the roof plate disappear obviously. The effect of the bolt support on the stress field and plastic area of the surrounding rock of the two types of roadway roof is not obvious. However, it has a significant effect on suppressing discontinuous deformation such as delamination and sliding between layered roof rocks. The delamination phenomenon between rock layers disappeared obviously, and the range of each numerical curve of the displacement field of the surrounding rock in the anchoring area was significantly reduced. However, the effect of the anchor support on continuous deformation control such as elastoplastic deformation of roof rock of nonlayered roadway is very limited. There is almost no change in the displacement field curve in the depth of the roof-surrounding rock. Only the shallow surrounding rock displacement field curve range has decreased.http://dx.doi.org/10.1155/2020/4841658 |
| spellingShingle | Chao Yuan Lei Fan Jian-feng Cui Wei-jun Wang Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks Advances in Civil Engineering |
| title | Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks |
| title_full | Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks |
| title_fullStr | Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks |
| title_full_unstemmed | Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks |
| title_short | Numerical Simulation of the Supporting Effect of Anchor Rods on Layered and Nonlayered Roof Rocks |
| title_sort | numerical simulation of the supporting effect of anchor rods on layered and nonlayered roof rocks |
| url | http://dx.doi.org/10.1155/2020/4841658 |
| work_keys_str_mv | AT chaoyuan numericalsimulationofthesupportingeffectofanchorrodsonlayeredandnonlayeredroofrocks AT leifan numericalsimulationofthesupportingeffectofanchorrodsonlayeredandnonlayeredroofrocks AT jianfengcui numericalsimulationofthesupportingeffectofanchorrodsonlayeredandnonlayeredroofrocks AT weijunwang numericalsimulationofthesupportingeffectofanchorrodsonlayeredandnonlayeredroofrocks |