Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining
The macro-micro mining response of the surrounding rock and overlying strata towards the transformation from open-pit to underground mining is examined in the present study, based on the engineering background of the Jinning phosphate mine (Yunnan Phosphate Chemical Group Co., Ltd.) via simulations...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5582218 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565913188040704 |
|---|---|
| author | Xiaoshuang Li Shun Yang Yunmin Wang Wen Nie Zhifang Liu |
| author_facet | Xiaoshuang Li Shun Yang Yunmin Wang Wen Nie Zhifang Liu |
| author_sort | Xiaoshuang Li |
| collection | DOAJ |
| description | The macro-micro mining response of the surrounding rock and overlying strata towards the transformation from open-pit to underground mining is examined in the present study, based on the engineering background of the Jinning phosphate mine (Yunnan Phosphate Chemical Group Co., Ltd.) via simulations involving similar materials, digital photographic measurement technology, and numerical simulation. The mining deformation of the surrounding rock underground, and of the overlying strata, is shown to develop in three stages, namely: (1) small and local deformation, (2) continuous linear increase, and (3) the violent nonlinear collapse of the entire system. The internal distribution of stress in the surrounding rock and adjacent overlying strata of the inclined mined-out area is complicated. The degrees of pressure increase and pressure relief have an important relationship with the size of the mining space. The pressure relief is more complete close to the mined area, and the stress reduction decreases with increasing distance. The cracks propagate in arc shapes and have a tendency to penetrate into the upper and lower ends of the stope. The size of the excavation space plays a key role in the generation, propagation, and penetration of the cracks. Due to the disturbance of the first mining level and the increase in excavation depth, the rate of damage to the surrounding and overlying rock increases in the second mining level. This process generates more cracks, which accelerate the instability of the surrounding rock and overlying strata. |
| format | Article |
| id | doaj-art-30884bcd4cae4d418264d820bfc03737 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-30884bcd4cae4d418264d820bfc037372025-02-03T01:05:31ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55822185582218Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground MiningXiaoshuang Li0Shun Yang1Yunmin Wang2Wen Nie3Zhifang Liu4School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, ChinaSchool of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, ChinaState Key Laboratory of Safety and Health in Metal Mines, Maanshan, Anhui 243003, ChinaSchool of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, ChinaSchool of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, ChinaThe macro-micro mining response of the surrounding rock and overlying strata towards the transformation from open-pit to underground mining is examined in the present study, based on the engineering background of the Jinning phosphate mine (Yunnan Phosphate Chemical Group Co., Ltd.) via simulations involving similar materials, digital photographic measurement technology, and numerical simulation. The mining deformation of the surrounding rock underground, and of the overlying strata, is shown to develop in three stages, namely: (1) small and local deformation, (2) continuous linear increase, and (3) the violent nonlinear collapse of the entire system. The internal distribution of stress in the surrounding rock and adjacent overlying strata of the inclined mined-out area is complicated. The degrees of pressure increase and pressure relief have an important relationship with the size of the mining space. The pressure relief is more complete close to the mined area, and the stress reduction decreases with increasing distance. The cracks propagate in arc shapes and have a tendency to penetrate into the upper and lower ends of the stope. The size of the excavation space plays a key role in the generation, propagation, and penetration of the cracks. Due to the disturbance of the first mining level and the increase in excavation depth, the rate of damage to the surrounding and overlying rock increases in the second mining level. This process generates more cracks, which accelerate the instability of the surrounding rock and overlying strata.http://dx.doi.org/10.1155/2021/5582218 |
| spellingShingle | Xiaoshuang Li Shun Yang Yunmin Wang Wen Nie Zhifang Liu Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining Geofluids |
| title | Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining |
| title_full | Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining |
| title_fullStr | Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining |
| title_full_unstemmed | Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining |
| title_short | Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining |
| title_sort | macro micro response characteristics of surrounding rock and overlying strata towards the transition from open pit to underground mining |
| url | http://dx.doi.org/10.1155/2021/5582218 |
| work_keys_str_mv | AT xiaoshuangli macromicroresponsecharacteristicsofsurroundingrockandoverlyingstratatowardsthetransitionfromopenpittoundergroundmining AT shunyang macromicroresponsecharacteristicsofsurroundingrockandoverlyingstratatowardsthetransitionfromopenpittoundergroundmining AT yunminwang macromicroresponsecharacteristicsofsurroundingrockandoverlyingstratatowardsthetransitionfromopenpittoundergroundmining AT wennie macromicroresponsecharacteristicsofsurroundingrockandoverlyingstratatowardsthetransitionfromopenpittoundergroundmining AT zhifangliu macromicroresponsecharacteristicsofsurroundingrockandoverlyingstratatowardsthetransitionfromopenpittoundergroundmining |