Theory and numerical simulation study on the plastic slip failure mechanism of multi-layered coal seam Floors-A case analysis DOI Creative Commons
Ning Kong, Xuyang Chen, Xufeng Wang

et al.

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 16, 2025

Coal seam mining induces disturbances in underground floors, leading to plastic failure, which presents significant safety risks, particularly areas with underlying pressurized water. Accurately assessing the maximum depth of such floor failure is crucial for ensuring safe operations. This study investigates evolution apparent resistivity 4,301 working face using network parallel electrical method. The observed was found be 19.3 m. Based on these measurements, slip theory a homogeneous rock layer applied, incorporating parameters as burial and height. Five mechanical models multi-layer composite floors were developed, calculated 18.26 also explores impact factors height, depth, internal friction angle layers depth. results demonstrate that exhibit 23.1% reduction average compared floors. Numerical simulations confirmed under disturbance 19.2 m, shear identified predominant mode. findings from theoretical analysis, numerical simulations, field measurements align closely, validating applicability research provides critical support operations coal seams above confined aquifers effective water control strategies.

Language: Английский

Energy absorption and failure behavior of honeycomb structure scaffold reinforced cementitious composites made of different materials DOI

Gaofang Zhu,

Hongwen Jing, Zhenhua Li

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 476, P. 141309 - 141309

Published: April 14, 2025

Language: Английский

Citations

0
Effect of 3D-printed polymer with negative Poisson's ratio structure on the mechanical characteristics of cemented tailings backfill DOI Creative Commons
Jiangyu Wu, Shihao Li,

Louyan Shen

et al.

Case Studies in Construction Materials, Journal Year: 2025, Volume and Issue: unknown, P. e04665 - e04665

Published: April 1, 2025

Language: Английский

Citations

0
Loading directionality of single-through fissure effects on mechanical properties of grouted rock DOI
Jiangyu Wu, Fuxiang Zhang, Zhenhua Li

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(5)

Published: May 1, 2025

Grouting reinforcement of rock masses containing numerous joints and fissures is significant for ensuring the safety deep mining underground structures. To quantify influence fissure loading directionality on mechanical properties grouted rocks, Brazilian splitting tests rocks were conducted with acoustic emission digital image correlation monitoring. A corresponding three-dimensional discrete element model was constructed to reproduce crack force chain evolution laws during process in tests. The failure mechanism under different angles between direction through analyzed. results show that initially increase then decrease as angle increases, transitions from being dominated by interface fracture medium splitting. strain-concentrated zones all are located along middle part specimen. As zone shows a inclination. When small, cracks tend extend propagate more readily at interface. number induced tensile-shear gradually decreases. main load-bearing chains also an offset, which highly consistent evolution. distribution high-strength distinctly directional, tendency aligning strain field. specimen exhibits higher when uniform larger.

Language: Английский

Citations

0
Study on mechanical properties and acoustic emission characteristics of concrete-high water composites under uniaxial compression DOI Creative Commons
Yue Cao, Lei Sun, Xiaowu Zhang

et al.

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 9, 2025

Under complex stress, a rigid filling body can easily cause the shear failure of gob-side entry retaining (GSER) roof, and flexible serious deformation roadway side. The combined with soft upper lower respond to needs support strength GSER. In this paper, uniaxial compression test acoustic emission (AE) characteristic concrete-high water composite (CHWC) specimens different height ratios (Height = High layer height/CHWC height) were performed explore influence ratio on CHWC specimens. results show that when is 10% 20%, stress-strain curve has secondary compaction, elastic, plastic stages. peak compressive negatively correlated high positively concrete layer. strain increases first then declines increase ratio. When ≤20%, plays major role in bearing capacity. about 224.4% 348% uttermost pure specimen (the same composition concrete). ≥30%, overall structure gradually fails after instability layer, stratification give full play role. research provide reference for applying technology

Language: Английский

Citations

0
Theory and numerical simulation study on the plastic slip failure mechanism of multi-layered coal seam Floors-A case analysis DOI Creative Commons
Ning Kong, Xuyang Chen, Xufeng Wang

et al.

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 16, 2025

Coal seam mining induces disturbances in underground floors, leading to plastic failure, which presents significant safety risks, particularly areas with underlying pressurized water. Accurately assessing the maximum depth of such floor failure is crucial for ensuring safe operations. This study investigates evolution apparent resistivity 4,301 working face using network parallel electrical method. The observed was found be 19.3 m. Based on these measurements, slip theory a homogeneous rock layer applied, incorporating parameters as burial and height. Five mechanical models multi-layer composite floors were developed, calculated 18.26 also explores impact factors height, depth, internal friction angle layers depth. results demonstrate that exhibit 23.1% reduction average compared floors. Numerical simulations confirmed under disturbance 19.2 m, shear identified predominant mode. findings from theoretical analysis, numerical simulations, field measurements align closely, validating applicability research provides critical support operations coal seams above confined aquifers effective water control strategies.

Language: Английский

Citations

0