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| Selection of Reasonable Layout Spacing of Hydraulic Punching Based on Dynamic Principle and Its Engineering Practice |
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Received:March 16, 2022
Revised:April 20, 2022
Accepted:May 06, 2022
Published Online:October 25, 2022
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| DOI： |
| KeyWord:punching layout spacing; gas discharge area; grey coefficient of influence of pumping stress; floor roadway of 2303 working face; numerical simulation |
| Author | Institution |
| huashuai |
Anyang main coking coal industry Co., Ltd |
| tiankunyun |
Department ofSafety Science Engineering,ttenan Institute ofEngineering |
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| Abstract: |
| Taking the reasonable borehole spacing arrangement of hydraulic punching technical measures in the main coke mine as the starting point, through the zoning research and effect investigation of the gas discharge area around the borehole, the grey coefficient of the influence of drainage and pressure relief stress (determined according to the actual engineering effect and experience of the mine) is innovatively introduced, and the gas pressure distribution between boreholes under different arrangement spacing is analyzed by fluent numerical simulation software, The field test is carried out in the floor roadway of 2303 working face of main coke coal mine. The research results show that the gas control effect is better when the appropriate drilling spacing is 7-7m under the hydraulic punching technical measures of main coke coal mine. The research conclusion provides a theoretical basis and engineering practice experience for the selection of reasonable hole spacing of hydraulic punching measures in the same type of coal mines. |
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