International Journal of Mining Science and Technology, Год журнала: 2024, Номер 34(12), С. 1677 - 1692
Опубликована: Дек. 1, 2024
Язык: Английский
Scientific Reports, Год журнала: 2025, Номер 15(1)
Опубликована: Янв. 21, 2025
Pillar stability has garnered significant attention owing to the effects of pillars on coal resource recovery rate, pillar stability, and bump risk. This study examined roadway control principles conventional yield pillars. The were designed as load-bearing structures with a high capacity carry most abutment load, while buffer for transferring rapidly increasing loads adjacent solid ribs by progressive deformation. In order analyze features dynamical evolution vertical stress distribution failure zone during loading, meticulously validated roof–coal–floor composite mathematical model was established.The energy under diverse w/h ratios analyzed, ratio elastic strain release rate introduced evaluate severity. Furthermore, behavior damage mechanism differences between investigated: are strong that bear load transfer sudden nearby gradually deforming. Finally, two case studies in Zhulinshan mine Tashan reported.
Язык: Английский
Процитировано
1
Frontiers in Earth Science, Год журнала: 2025, Номер 13
Опубликована: Март 17, 2025
To solve the problem of large deformations and failure rocks surrounding a dense area at footwall normal fault, we considered F22 fault in fourth mining Dashucun coal mine Hebei Province as research object conducted onsite investigations hidden dangers, such roof caving wall over roadway. The deformation law was obtained using FLAC3D numerical simulation method, factors influencing were analyzed. Consequently, advanced support working face scheme for roadway optimized. After implementing these programs, results showed that with exception belt rise, where rock affected to some extent, subsidence approach two gangs areas could be controlled within 220 mm 320 mm, respectively. Hence, proved conditions met needs project.
Язык: Английский
Процитировано
1
Rock Mechanics and Rock Engineering, Год журнала: 2025, Номер unknown
Опубликована: Март 23, 2025
Язык: Английский
Процитировано
1
Frontiers in Materials, Год журнала: 2025, Номер 12
Опубликована: Фев. 11, 2025
The surrounding rocks in deep roadways frequently undergo dynamic disturbances caused by adjacent blasting or mining activities. These lead to the propagation and coalescence of cracks rock, inducing disasters roadways. However, mechanisms rock crack roadway failures, induced under different positions strengths, remain unclear. To investigate disturbance rocks, large-scale physical model tests are carried out on instability high situ stress disturbance. failure modes loads analyzed. results suggest that conditions ground stress, initiate concentration zones As intensities increase, these can further extend, leading rapid rock. location influences process Under such conditions, often occurs at arch shoulder bottom roadway. When source changes from side wall arch, it is more likely cause damage within bottom, which result
Язык: Английский
Процитировано
0
Frontiers in Earth Science, Год журнала: 2025, Номер 13
Опубликована: Фев. 25, 2025
The freezing method is often adopted to reinforce the surrounding formation during deep foundation pit excavations. According traditional theory of wall design in coal mine construction engineering, it necessary a continuous, thicker wall. multi-turn combination cylinder structure can optimize design, but strength and stability are theoretical technical issues that urgently need be researched solved. In this work, mechanical characteristics frozen walls multi-coil composite cylinders analyzed using methods. Based on elastoplastic theory, combined simplified an axisymmetric plane problem, calculation model expansion force, generated by process, around perimeter circular hole under strain developed. corresponding variable for displacement immobility point circle proposed, progressive achieved through iterative calculations. formulas force process derived considering gradual expansion. results research provide basis permafrost engineering.
Язык: Английский
Процитировано
0
Rock Mechanics and Rock Engineering, Год журнала: 2025, Номер unknown
Опубликована: Март 11, 2025
Язык: Английский
Процитировано
0
Scientific Reports, Год журнала: 2025, Номер 15(1)
Опубликована: Март 19, 2025
The initiation mechanism of rockslides is crucial to the quantitative evaluation slope, especially in slopes containing locked sections. In this study, analysis focuses on tensile fracture sections with stepped joints through rock bridge experiments. Rock experiments under low normal stress were performed samples joints. cracking behavior bridges, including deformation, strength, mode, and damage, analyzed from a macroscopic microscopic perspective. High-angle bridges are highly brittle significant failure precursors. As angle changes, shear strength parameters exhibit negative correlation evolution pattern. Cohesion lower, internal friction higher high-angle bridges. This can be attributed damage plane. Different mechanical modes concentration zones trigger varying bridge. Through comparative experiments, slope bottom tests, numerical simulations, it observed that displacement deflection effect plays key role experimental approach provides valuable insights into research elucidating mechanism.
Язык: Английский
Процитировано
0
Measurement, Год журнала: 2024, Номер unknown, С. 116574 - 116574
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
3
Geomatics Natural Hazards and Risk, Год журнала: 2025, Номер 16(1)
Опубликована: Фев. 12, 2025
Язык: Английский
Процитировано
0
International Journal of Mining Science and Technology, Год журнала: 2024, Номер 34(12), С. 1677 - 1692
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
2