Failure Characteristics of the Water-Resisting Coal Pillar under Stress-Seepage Coupling and Determination of Reasonable Coal Pillar Width
Abstract
:1. Introduction
2. Engineering Background
3. Stress-Seepage Coupling Test on Coal Rock
3.1. Selection and Preparation of Coal Samples
3.2. Experimental Methods, Apparatus and Scheme
3.3. Experimental Results
4. Numerical Simulation of Stress-Seepage Coupling in the Coal Pillar
4.1. Simulation Schemes
4.2. Simulation Results
- (1)
- Mechanical distribution characteristics of the intact water-resisting coal pillar under mining stress
- (2)
- Distribution of mechanical characteristics of intact water-resisting coal pillar under the stress-seepage coupling
- (3)
- Distribution of mechanical characteristics of the water-resisting coal pillar with fractures under the stress-seepage coupling
5. Determination of the Reserved Width of the Water-Resisting Coal Pillar under the Stress-Seepage Coupling
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Group Number | Inner Size (mm) | Water Content (%) | Axial Compressive Pressure (MPa) | Confining Pressure (Mpa) |
---|---|---|---|---|
A1 | 15 | 0 | 10 | 6 |
A2 | 15 | 6.28 | 10 | 6 |
A3 | 15 | 13.65 | 10 | 6 |
B1 | 20 | 0 | 10 | 6 |
B2 | 20 | 6.28 | 10 | 6 |
B3 | 20 | 13.65 | 10 | 6 |
C1 | 25 | 0 | 10 | 6 |
C2 | 25 | 6.28 | 10 | 6 |
C3 | 25 | 13.65 | 10 | 6 |
D1 | 30 | 0 | 10 | 6 |
D2 | 30 | 6.28 | 10 | 6 |
D3 | 30 | 13.65 | 10 | 6 |
E1 | 35 | 0 | 10 | 6 |
E2 | 35 | 6.28 | 10 | 6 |
E3 | 35 | 13.65 | 10 | 6 |
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Liu, Q.; Xue, Y.; Ma, D.; Li, Q. Failure Characteristics of the Water-Resisting Coal Pillar under Stress-Seepage Coupling and Determination of Reasonable Coal Pillar Width. Water 2023, 15, 1002. https://doi.org/10.3390/w15051002
Liu Q, Xue Y, Ma D, Li Q. Failure Characteristics of the Water-Resisting Coal Pillar under Stress-Seepage Coupling and Determination of Reasonable Coal Pillar Width. Water. 2023; 15(5):1002. https://doi.org/10.3390/w15051002
Chicago/Turabian StyleLiu, Quanhui, Yuanbo Xue, Dan Ma, and Qiang Li. 2023. "Failure Characteristics of the Water-Resisting Coal Pillar under Stress-Seepage Coupling and Determination of Reasonable Coal Pillar Width" Water 15, no. 5: 1002. https://doi.org/10.3390/w15051002