Abstract
Water-bearing caves in the Maokou limestone have caused disastrous water inrushes in mines in southern China. A linkage analysis between the hydro-mechanical coupling and the strength reduction method was used to investigate the stability of water-resistant rock pillars. The factor of safety (FOS) of the pillar was established, and a criterion for establishing the required width of the pillar was proposed in engineering practice, i.e., the width of the pillar should be based on the blast hole depth and blast-disturbance depth, along with a FOS of 1.5. The permeability of the water-resistant pillar and the probability of water inrush both increase as the strength reduction factor increases because the effective width of the pillar narrows. A numerical analysis of the Qiyi coal mine “4·16” water inrush accident shows that the cause of the inrush was that the 3.0 m wide barrier left by roadway excavation was too narrow to withhold the karst water pressure of about 4.0 MPa.
| Translated title of the contribution | Numerical Analysis of Karst Water Inrush and a Criterion for Establishing the Width of Water-resistant Rock Pillars : |
|---|---|
| Language | Spanish |
| Pages | 1-12 |
| Number of pages | 12 |
| Journal | Mine Water and the Environment |
| DOIs | |
| State | Accepted/In press - Feb 25 2017 |
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Keywords
- Factor of safety
- Hydro-mechanical coupling
- Mining engineering
- Strength reduction method
ASJC Scopus subject areas
- Water Science and Technology
- Geotechnical Engineering and Engineering Geology
Cite this
Análisis numérico de la irrupción de agua karst y un criterio para establecer el espesor de los pilares de roca resistentes al agua. / Zhao, Yanlin; Luo, Shilin; Wang, Yixian; Wang, Weijun; Zhang, Lianyang; Wan, Wen.
In: Mine Water and the Environment, 25.02.2017, p. 1-12.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Análisis numérico de la irrupción de agua karst y un criterio para establecer el espesor de los pilares de roca resistentes al agua
AU - Zhao,Yanlin
AU - Luo,Shilin
AU - Wang,Yixian
AU - Wang,Weijun
AU - Zhang,Lianyang
AU - Wan,Wen
PY - 2017/2/25
Y1 - 2017/2/25
N2 - Water-bearing caves in the Maokou limestone have caused disastrous water inrushes in mines in southern China. A linkage analysis between the hydro-mechanical coupling and the strength reduction method was used to investigate the stability of water-resistant rock pillars. The factor of safety (FOS) of the pillar was established, and a criterion for establishing the required width of the pillar was proposed in engineering practice, i.e., the width of the pillar should be based on the blast hole depth and blast-disturbance depth, along with a FOS of 1.5. The permeability of the water-resistant pillar and the probability of water inrush both increase as the strength reduction factor increases because the effective width of the pillar narrows. A numerical analysis of the Qiyi coal mine “4·16” water inrush accident shows that the cause of the inrush was that the 3.0 m wide barrier left by roadway excavation was too narrow to withhold the karst water pressure of about 4.0 MPa.
AB - Water-bearing caves in the Maokou limestone have caused disastrous water inrushes in mines in southern China. A linkage analysis between the hydro-mechanical coupling and the strength reduction method was used to investigate the stability of water-resistant rock pillars. The factor of safety (FOS) of the pillar was established, and a criterion for establishing the required width of the pillar was proposed in engineering practice, i.e., the width of the pillar should be based on the blast hole depth and blast-disturbance depth, along with a FOS of 1.5. The permeability of the water-resistant pillar and the probability of water inrush both increase as the strength reduction factor increases because the effective width of the pillar narrows. A numerical analysis of the Qiyi coal mine “4·16” water inrush accident shows that the cause of the inrush was that the 3.0 m wide barrier left by roadway excavation was too narrow to withhold the karst water pressure of about 4.0 MPa.
KW - Factor of safety
KW - Hydro-mechanical coupling
KW - Mining engineering
KW - Strength reduction method
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UR - http://www.scopus.com/inward/citedby.url?scp=85013821274&partnerID=8YFLogxK
U2 - 10.1007/s10230-017-0438-4
DO - 10.1007/s10230-017-0438-4
M3 - Article
SP - 1
EP - 12
JO - Mine Water and the Environment
T2 - Mine Water and the Environment
JF - Mine Water and the Environment
SN - 1025-9112
ER -