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| Experiment on CO concentration characteristics and ventilation optimization of roadway stope in a mine under the action of multiple factor |
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Received:July 18, 2022
Revised:August 01, 2022
Accepted:August 03, 2022
Published Online:April 21, 2023
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| DOI： |
| KeyWord:Similarity experiment; CO concentration; Roadway stope; Ventilation mode;Ventilation optimization |
| Author | Institution |
| Li Hong-kun |
Faculty of Land and Resources Engineering,Kunming University of Science and Technology |
| WANG Xiao-dong |
Faculty of Land and Resources Engineering,Kunming University of Science and Technology |
| ZHANG Yu |
School of Public Safety and Emergency Management,Kunming University of Science and Technology |
| HE De-xing |
Faculty of Land and Resources Engineering,Kunming University of Science and Technology |
| LIU Jie |
School of Public Safety and Emergency Management,Kunming University of Science and Technology |
| GUO Chen-yang |
School of Public Safety and Emergency Management,Kunming University of Science and Technology |
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| Abstract: |
| In view of the limitations of the traditional CO concentration characteristic experiment of roadway stope with too few considerations and relatively one-sided analysis, the physical similarity model of roadway stope is established by the similarity theory combined with the mine site, and the control variable method is used to carry out the experimental study of CO concentration characteristic of roadway stope under the action of multiple factors. The results show that the characteristics of CO concentration in stope at different ventilation modes, different wind speeds and different measuring points are as follows: the lower the CO concentration is, the more the ventilation with long suction and short pressure is adopted. The higher the wind speed, the lower the CO concentration. The greater the distance from the CO production place on the palm, the lower the CO concentration. The variation trend of CO concentration obtained by field experiment and similar experiment is basically the same. It is considered that the use of long suction and short pressure ventilation with a wind speed of 0.75 m/s can effectively reduce the CO concentration in roadway stope, and the obtained ventilation scheme can provide a reference for the prevention and control of CO ventilation in roadway stope under the same environment. |
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