Failure and Permeability Characteristics of Coal Pillar in Closely Coal Seams Gob Under Multiple Mining DOI Open Access

Hui Qiao,

Song Liu, Lei Dong

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(12), P. 2934 - 2934

Published: Dec. 22, 2024

Coal pillars are loaded and unloaded repeatedly when mining, which lead to fractures in the coal close, open, generate expand. As a result, permeability of is changed. The high rock between upper gobs lower working faces main channels for fresh air entering gob, could induce spontaneous combustion gob. To identifying leakage channels, multiple mining closely seams was numerically conducted with three face layouts. failure characteristic pillar gob under were obtained analyzed. When mined, vertical stress horizontal load unload synchronously all laterally directed zero due no confine on lateral side pillar. middle loads continuously until mined. seam damage shear tension. staggered from face, increases more than 22000 times tension channel flowing into provides favorable conditions

Language: Английский

The Mechanism of Enhanced Spontaneous Combustion Risk of Coal Affected by Geo-Stress in Deep Mines DOI
Congsheng Bian,

Xiuhong Zhou,

Shengqiang Yang

et al.

Combustion Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 17

Published: March 1, 2025

Language: Английский

Citations

0
Failure and Permeability Characteristics of Coal Pillar in Closely Coal Seams Gob Under Multiple Mining DOI Open Access

Hui Qiao,

Song Liu, Lei Dong

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(12), P. 2934 - 2934

Published: Dec. 22, 2024

Coal pillars are loaded and unloaded repeatedly when mining, which lead to fractures in the coal close, open, generate expand. As a result, permeability of is changed. The high rock between upper gobs lower working faces main channels for fresh air entering gob, could induce spontaneous combustion gob. To identifying leakage channels, multiple mining closely seams was numerically conducted with three face layouts. failure characteristic pillar gob under were obtained analyzed. When mined, vertical stress horizontal load unload synchronously all laterally directed zero due no confine on lateral side pillar. middle loads continuously until mined. seam damage shear tension. staggered from face, increases more than 22000 times tension channel flowing into provides favorable conditions

Language: Английский

Citations

0