Mechanism and Comprehensive Prevention and Control of Damage Resulting From Dynamic Pressure on a Roadway of a Near-Vertical and Extra-Thick Coal Seam: Case Analysis of Wudong Coal Mine
Aiming at the problem of large deformation and failure of the surrounding rock of the mining roadway in the nearly vertical and extra-thick coal seam group under the action of dynamic pressure, the deformation and failure mechanism of the mining roadway were analyzed based on the actual engineering...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/vib/8810792 |
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| Summary: | Aiming at the problem of large deformation and failure of the surrounding rock of the mining roadway in the nearly vertical and extra-thick coal seam group under the action of dynamic pressure, the deformation and failure mechanism of the mining roadway were analyzed based on the actual engineering conditions. Using the methods of in situ stress testing, physical composition analysis, and numerical simulation, the deformation and failure laws of the surrounding rock in the mining tunnel are expounded. The results show that the special geological structure and the bending and prying action of the middle rock column put the coal and rock mass in a high stress state, and the dynamic pressure disturbance aggravated the instability of the jointed and fractured surrounding rock in this high stress state. Using the method of transient electromagnetic testing, prevention and control measures such as deep hole pressure relief blasting and optimized mining sequence were determined, which effectively reduced the stress of the surrounding rock and weakened the impact of dynamic pressure on the stability of the tunnel’s surrounding rock. Field measurement and numerical simulation results show that the constant resistance large deformation active coupling support technology effectively improves the joint bearing capacity of the support structure and surrounding rock, and the deformation and damage of the surrounding rock in the tunnel are effectively prevented. Different engineering conditions have different damage characteristics of tunnel surrounding rocks, and specific problems should be analyzed in the prevention and control process. Although this result has achieved good application results in this project, it still has certain limitations. Some technical parameters are only applicable to this project or to situations with similar nearly vertical strata. |
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| ISSN: | 1875-9203 |