Experimental research on creep characteristics and failure mechanism of mining roadway in nearly vertical coal seams DOI Creative Commons
Peng Bai, Zhiyong Li, Yu Cong

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: June 19, 2024

Introduction: Nearly vertical coal seams present a significant challenge for the mining industry due to their difficult accessibility. However, these account substantial proportion of world’s reserves. Therefore, it is vital conduct research on disaster control techniques safe seams. Method: The team used experimental research, theoretical analysis, and numerical calculation methods investigate creep characteristics failure mechanisms layered sandstone roadway in nearly seam. Results discussion: These findings revealed that maximum moment concentrated stress located side roof was positioned middle structure, making more susceptible transverse shear failure. On other hand, structure floor prone slip initiated from bottom structure. This led asymmetric instability roadway. practical implications this are results could help inform development techniques.

Language: Английский

Crack-tip propagation laws and energy evolution of fractured sandstone DOI

Yu Jiao,

Yujun Zuo,

Zhijie Wen

et al.

Engineering Failure Analysis, Journal Year: 2024, Volume and Issue: unknown, P. 108832 - 108832

Published: Sept. 1, 2024

Language: Английский

Citations

3
Research on the prediction of tar potential and maceral recognition based on artificial neural network: A case study of tar-rich coal from north Shaanxi, China DOI
Shiyong Zhao,

Jinwen Fan,

Dechao Wang

et al.

Fuel, Journal Year: 2024, Volume and Issue: 377, P. 132827 - 132827

Published: Aug. 18, 2024

Language: Английский

Citations

2
A selection methodology on reasonable width of stabilized coal pillar for retracement channel in longwall working face DOI Creative Commons
Pengfei Shan, Meng Zheng,

Xingping Lai

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Aug. 1, 2024

In this paper, the No. 30201 working face of a specific colliery was determined as study area in Yushen mining area, China. The objective paper is to determine optimal position for pressure regulation measures during final stage. A mechanical calculation model stabilized coal pillar developed. analytical solution front abutment function obtained. Limit equilibrium theory and beam were employed compute critical width value pillar. analysis focused on examining spatiotemporal relationship between rotational deformation main roof stability retracement channel. utilized numerical simulation investigate failure characteristics surrounding rock stress redistribution within face. Through comprehensive analysis, reasonable 15 m successfully implemented field practices. method using Artificial Neural Network (ANN) select proposed. input ANN through theoretical analysis. Four models BP, WOA-BP, PSO-BP, CPSO-BP trained. accuracy each evaluated by three quantitative metrics: MAE, MRE, RMSE. MAE 0.9489, showing reduction 70.87% compared BP model, 55.84% WOA-BP 51.26% PSO-BP model. MRE 0.0559, which 71.51%, 56.29%, 53.24% lower than other models, respectively. RMSE 1.0617, 68.92%, 56.13%, 53.03% four values 12.7 m, 16.3 14.1 15.2 respectively, indicating that can effectively

Language: Английский

Citations

1
Experimental research on creep characteristics and failure mechanism of mining roadway in nearly vertical coal seams DOI Creative Commons
Peng Bai, Zhiyong Li, Yu Cong

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: June 19, 2024

Introduction: Nearly vertical coal seams present a significant challenge for the mining industry due to their difficult accessibility. However, these account substantial proportion of world’s reserves. Therefore, it is vital conduct research on disaster control techniques safe seams. Method: The team used experimental research, theoretical analysis, and numerical calculation methods investigate creep characteristics failure mechanisms layered sandstone roadway in nearly seam. Results discussion: These findings revealed that maximum moment concentrated stress located side roof was positioned middle structure, making more susceptible transverse shear failure. On other hand, structure floor prone slip initiated from bottom structure. This led asymmetric instability roadway. practical implications this are results could help inform development techniques.

Language: Английский

Citations

0