Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well
From the standard test method suggested by ISRM and GB/T50266-2013, the uniaxial static tensile strength, dynamic tensile strength, and dynamic fracture toughness of the same basalt at different depths have been measured, respectively. It is observed that there may be an empirical relation between d...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/2567438 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832562874771308544 |
|---|---|
| author | Ke Man Xiaoli Liu |
| author_facet | Ke Man Xiaoli Liu |
| author_sort | Ke Man |
| collection | DOAJ |
| description | From the standard test method suggested by ISRM and GB/T50266-2013, the uniaxial static tensile strength, dynamic tensile strength, and dynamic fracture toughness of the same basalt at different depths have been measured, respectively. It is observed that there may be an empirical relation between dynamic fracture toughness and dynamic tensile strength. The testing data show that both the dynamic fracture toughness and dynamic tensile strength increase with the loading rate and the dynamic tensile strength increases a little bit more quickly than the dynamic fracture toughness. With an increasing depth, the dynamic tensile strength has much more influence on the dynamic fracture toughness, as which it is much liable to bring out the unexpected catastrophes in the engineering projects, especially during the excavation at deep mining. From the rock failure mechanisms, it is pointed out that the essential reason of the rock failure is the microcrack unstable propagation. The crack processes growth, propagation, and coalescence are induced by tensile stress, not shear stress or compressive stress. The paper provides estimation of the dynamic fracture toughness from the dynamic tensile strength value, which can be measured more easily. |
| format | Article |
| id | doaj-art-65f79194d2d54437aed82b9c7cde7414 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-65f79194d2d54437aed82b9c7cde74142025-02-03T01:21:30ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/25674382567438Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai WellKe Man0Xiaoli Liu1Division of Environment Engineering, Beijing Research Institute of Uranium Geology, Beijing 100029, ChinaState Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinaFrom the standard test method suggested by ISRM and GB/T50266-2013, the uniaxial static tensile strength, dynamic tensile strength, and dynamic fracture toughness of the same basalt at different depths have been measured, respectively. It is observed that there may be an empirical relation between dynamic fracture toughness and dynamic tensile strength. The testing data show that both the dynamic fracture toughness and dynamic tensile strength increase with the loading rate and the dynamic tensile strength increases a little bit more quickly than the dynamic fracture toughness. With an increasing depth, the dynamic tensile strength has much more influence on the dynamic fracture toughness, as which it is much liable to bring out the unexpected catastrophes in the engineering projects, especially during the excavation at deep mining. From the rock failure mechanisms, it is pointed out that the essential reason of the rock failure is the microcrack unstable propagation. The crack processes growth, propagation, and coalescence are induced by tensile stress, not shear stress or compressive stress. The paper provides estimation of the dynamic fracture toughness from the dynamic tensile strength value, which can be measured more easily.http://dx.doi.org/10.1155/2018/2567438 |
| spellingShingle | Ke Man Xiaoli Liu Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well Advances in Civil Engineering |
| title | Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well |
| title_full | Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well |
| title_fullStr | Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well |
| title_full_unstemmed | Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well |
| title_short | Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well |
| title_sort | dynamic fracture toughness and dynamic tensile strength of the rock from different depths of beijing datai well |
| url | http://dx.doi.org/10.1155/2018/2567438 |
| work_keys_str_mv | AT keman dynamicfracturetoughnessanddynamictensilestrengthoftherockfromdifferentdepthsofbeijingdataiwell AT xiaoliliu dynamicfracturetoughnessanddynamictensilestrengthoftherockfromdifferentdepthsofbeijingdataiwell |