Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation
The stability and dynamic response of coal pillar is of great importance in underground coal mining. In this paper, a series of uniaxial compressive experiments were first carried out to investigate the mechanical properties of coal. Subsequently, a statistical constitutive damage model for coal was...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6697507 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832552535367352320 |
|---|---|
| author | Guo-Wei Dong Hai-Yang Liu Guang-an Zhu |
| author_facet | Guo-Wei Dong Hai-Yang Liu Guang-an Zhu |
| author_sort | Guo-Wei Dong |
| collection | DOAJ |
| description | The stability and dynamic response of coal pillar is of great importance in underground coal mining. In this paper, a series of uniaxial compressive experiments were first carried out to investigate the mechanical properties of coal. Subsequently, a statistical constitutive damage model for coal was proposed and applied to the numerical simulation. The proposed strain damage softening function showed almost the same goodness-of-fit on the experimental curve. According to this investigation, a numerical model FLAC3Dwas created to investigate the dynamic behavior of the coal pillar under different load percentage (LP). Modelling suggests that the incident and transmitted wave stress evolution observes similar rule and its process can be divided into three stages, namely, static preload, dynamic disturbance, and stabilized stages. The effects of dynamic disturbance intensity are also studied at 10 MPa, 20 MPa, and 30 MPa of peak stress, respectively. The results indicate that under the same load percentage, the peak incident and transmitted wave stress increase with the increase of dynamic disturbance intensity. On the contrary, the attenuation decreases. It is also observed that the failure zone interior the coal can be predicted by the wave propagation. |
| format | Article |
| id | doaj-art-de833bd4bcf04bc7b8a51a6d97efc909 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-de833bd4bcf04bc7b8a51a6d97efc9092025-02-03T05:58:30ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66975076697507Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical SimulationGuo-Wei Dong0Hai-Yang Liu1Guang-an Zhu2School of Energy Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaThe stability and dynamic response of coal pillar is of great importance in underground coal mining. In this paper, a series of uniaxial compressive experiments were first carried out to investigate the mechanical properties of coal. Subsequently, a statistical constitutive damage model for coal was proposed and applied to the numerical simulation. The proposed strain damage softening function showed almost the same goodness-of-fit on the experimental curve. According to this investigation, a numerical model FLAC3Dwas created to investigate the dynamic behavior of the coal pillar under different load percentage (LP). Modelling suggests that the incident and transmitted wave stress evolution observes similar rule and its process can be divided into three stages, namely, static preload, dynamic disturbance, and stabilized stages. The effects of dynamic disturbance intensity are also studied at 10 MPa, 20 MPa, and 30 MPa of peak stress, respectively. The results indicate that under the same load percentage, the peak incident and transmitted wave stress increase with the increase of dynamic disturbance intensity. On the contrary, the attenuation decreases. It is also observed that the failure zone interior the coal can be predicted by the wave propagation.http://dx.doi.org/10.1155/2021/6697507 |
| spellingShingle | Guo-Wei Dong Hai-Yang Liu Guang-an Zhu Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation Advances in Civil Engineering |
| title | Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation |
| title_full | Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation |
| title_fullStr | Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation |
| title_full_unstemmed | Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation |
| title_short | Dynamic Behavior of Coal Pillar under Different Load Percentage by Numerical Simulation |
| title_sort | dynamic behavior of coal pillar under different load percentage by numerical simulation |
| url | http://dx.doi.org/10.1155/2021/6697507 |
| work_keys_str_mv | AT guoweidong dynamicbehaviorofcoalpillarunderdifferentloadpercentagebynumericalsimulation AT haiyangliu dynamicbehaviorofcoalpillarunderdifferentloadpercentagebynumericalsimulation AT guanganzhu dynamicbehaviorofcoalpillarunderdifferentloadpercentagebynumericalsimulation |