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| Numerical simulation analysis of the attenuation law of water inflow from drilling holes for advanced drainage of aquifer in coal mines |
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Received:July 26, 2023
Revised:August 25, 2023
Accepted:October 07, 2023
Published Online:March 24, 2025
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| DOI： |
| KeyWord:Advance drainage of water; Numerical simulation; Attenuation law; Water inflow; Underground aquifer; Drilling; |
| Author | Institution |
| 赵常凤 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
| 刘正文 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
| 沈礼锋 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
| 宋峰 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
| 张亮 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
| 张洪波 |
The First Exploration Team of Shandong Coalfield Geology Bureau |
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| Abstract: |
| The attenuation law of borehole water inflow can provide an effective means to control the water loss disaster in coal mine. In order to ensure the safe production of coal mine, the numerical simulation analysis of the attenuation law of borehole water inflow in advance drainage of aquifer in coal mine is put forward. Taking Q coal mine as the research object, the boundary conditions of numerical simulation are set by using SEEP/W software, and the numerical simulation model of water inflow attenuation law is constructed through grid division, so as to realize the numerical simulation of water inflow attenuation law in drilling holes. The results show that with the increase of initial head and permeability coefficient, the peak water inflow and quasi-stable water inflow of borehole become larger and larger, while the increase of elastic specific yield will make the peak water inflow of borehole increase, while the quasi-stable water inflow remains stable. With the increase of borehole diameter, elevation angle and inclined length, the peak water inflow and quasi-stable water inflow of borehole increase gradually. After increasing the number and coverage of drilling holes, the water inrush from a single drilling hole and drilling area is obviously attenuated, and the drainage ability of the drilling hole located in the center of the drilling area is most disturbed by the group of holes. |
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