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The optimal grouting area and cable distribution design for guaranteeing roadway stability while considering fluid
Peng Li1,2,3, Yinghai Guo4,5, Yinghao Cheng4,6
1School of Resources and Earth Sciences, China University of Mining and Technology, Xuzhou, China. lb22010016@cumt.edu.cn.
Scientific Reports
|January 8, 2025
Summary
This study optimized grouting and cable support to prevent water inrush in coal mines. The new method significantly reduced water inflow and controlled roadway displacement, proving effective in practice.
Area of Science:
- Mining Engineering
- Geotechnical Engineering
- Computational Mechanics
Background:
- Water inrush in coal mine roadways is a significant hazard, exacerbated by saturated rock masses.
- Current methods like grouting and cable support are used to mitigate water flow and ensure roadway stability.
Purpose of the Study:
- To determine optimal grouting area and cable support configurations for preventing water inrush.
- To validate the effectiveness of the optimized design in real-world engineering applications.
Main Methods:
- Utilized FLAC3D (fast Lagrangian analysis of continua 3 dimension) numerical simulation software.
- Incorporated fluid-mechanical coupling effects in the analysis.
- Employed the CMOEAD (constrained multi-objective evolution algorithm based on decomposition) for optimization.
Main Results:
- Identified optimal grouting area parameters: ellipse center (0.01, 1.59), long axis 4.73 m, short axis 4.60 m, inclination 53.15°.
- Determined optimal cable support: length 6.51 m, total 11 cables.
- Engineering application showed markedly reduced water inrush and controlled roadway displacement.
Conclusions:
- The proposed method, integrating numerical simulation and optimization, is workable and reliable for water inrush prevention.
- Optimized grouting and cable support designs effectively enhance coal mine roadway stability.
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