A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault
Setting up a waterproof coal pillar is an important measure to prevent water inrush from the Weibei mining through fault floor. Based on the plastic slip line field theory, a mechanical model of floor water inrush induced by confined water in the through fault zone was established. The mechanical expressions of confined water pressure and the width of the waterproof coal pillar under the state of limit equilibrium were derived. Combining the laws of floor deformation, failure and fault activation under two kinds of coal pillar width, the safety width of the waterproof coal pillar was determined. Furthermore, the safety threshold is better than the empirical value mentioned in the “coal mine safety regulations.” Following this, grouting transformation was carried out on the K2 sand layer of the cut roadway floor. This provided a theoretical basis and engineering practice for water disaster prevention and the control of the structural floor under similar conditions in the Weibei mining area for future benefit.
Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault
Setting up a waterproof coal pillar is an important measure to prevent water inrush from the Weibei mining through fault floor. Based on the plastic slip line field theory, a mechanical model of floor water inrush induced by confined water in the through fault zone was established. The mechanical expressions of confined water pressure and the width of the waterproof coal pillar under the state of limit equilibrium were derived. Combining the laws of floor deformation, failure and fault activation under two kinds of coal pillar width, the safety width of the waterproof coal pillar was determined. Furthermore, the safety threshold is better than the empirical value mentioned in the “coal mine safety regulations.” Following this, grouting transformation was carried out on the K2 sand layer of the cut roadway floor. This provided a theoretical basis and engineering practice for water disaster prevention and the control of the structural floor under similar conditions in the Weibei mining area for future benefit.
Design of Longwall Coal Pillar for the Prevention of Water Inrush from the Seam Floor with Through Fault
Ang Li (author) / Bing nan Ji (author) / Qiang Ma (author) / Chaoyang Liu (author) / Feng Wang (author) / Li Ma (author) / Pengfei Mu (author) / Lin Mou (author) / Yuxuan Yang (author) / Xuesong Ding (author)
2021
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Numerical Simulation of the Lagging Water Inrush Process from Insidious Fault in Coal Seam Floor
| Online Contents | 2017
Numerical Simulation of the Lagging Water Inrush Process from Insidious Fault in Coal Seam Floor
| Online Contents | 2017
Longwall chain pillar design for weak floor conditions
| British Library Conference Proceedings | 1996
Mechanization of longwall mining in coal seam with soft floor strata
| Engineering Index Backfile | 1969