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| DEM Simulation of large scale overlying strata collapse process under mining influence |
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Received:October 16, 2018
Revised:November 27, 2018
Accepted:January 08, 2019
Published Online:December 24, 2019
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| DOI： |
| KeyWord:underground mining; overlying rock; unloading; discrete element; collapse; 2d-block |
| Author | Institution |
| guoyanhui |
Yunnan Agricultural University |
| wanguoxian |
Yunnan Agricultural University |
| likegang |
Faculty of Land Resource Engineering |
| yangzhiquan |
Kunming University of Science and Technology |
| wangjianguo |
Yunnan Agricultural University |
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| Abstract: |
| In order to study the process of large-scale overlying strata collapse under the influence of mining in a certain mining area, on the basis of macroscopic rock mechanics parameters，the dynamic development process of large-scale overlying rock collapse and caving under the condition of continuous excavation and unloading in different middle sections is analyzed by using the discrete element method program 2D-block. The simulation results show that with the continuous mining of the deep orebody, the overlying rock mass cave and collapse scope increases gradually, the collapse of overburden strata has a certain hysteresis. The maximum collapse range of overburden strata are respectively 25m, 42m and 42m after 13, 14 and 15 middle section are mined; the maximum collapse range of overlying rock are respectively 76m, 97m and 110m after 16, 17 and 18 middle sections are mined. |
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