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Study on failure mechanism and control techniques of the preparation roadway induced by dynamic mining disturbance
To explore failure mechanism of the roadway subject to dynamic pressures, a preparatory roadway influenced by mining disturbance was systematically studied in this paper.The borehole imaging method was used to explore crack propagation characteristics of surrounding rock under dynamic pressures, and numerical simulation was carried out to investigate evolution laws of the stress around the roadway.Accordingly, a dissymmetrical control technique for the preparatory roadway was proposed based on the principle that the vulnerable area should be paid more attention while proper treatment of small disturbance area is enough.The results showed that the floor and rib of the preparatory roadway were vulnerable areas of the surrounding rock where fractures were distributed by dynamic pressures.As the distance from the dynamic pressure source to the affected roadway decreased, the effects of the dynamical pressure increased.The shape of the vertical stress between the roadway and the dynamic pressure source was a dissymmetrical bimodal arch.Field tests indicated that the deformation and deformation rate of the surrounding rock reduced obviously after adopting the proposed measures, and that the control effects were satisfactory.
Study on failure mechanism and control techniques of the preparation roadway induced by dynamic mining disturbance
To explore failure mechanism of the roadway subject to dynamic pressures, a preparatory roadway influenced by mining disturbance was systematically studied in this paper.The borehole imaging method was used to explore crack propagation characteristics of surrounding rock under dynamic pressures, and numerical simulation was carried out to investigate evolution laws of the stress around the roadway.Accordingly, a dissymmetrical control technique for the preparatory roadway was proposed based on the principle that the vulnerable area should be paid more attention while proper treatment of small disturbance area is enough.The results showed that the floor and rib of the preparatory roadway were vulnerable areas of the surrounding rock where fractures were distributed by dynamic pressures.As the distance from the dynamic pressure source to the affected roadway decreased, the effects of the dynamical pressure increased.The shape of the vertical stress between the roadway and the dynamic pressure source was a dissymmetrical bimodal arch.Field tests indicated that the deformation and deformation rate of the surrounding rock reduced obviously after adopting the proposed measures, and that the control effects were satisfactory.
Study on failure mechanism and control techniques of the preparation roadway induced by dynamic mining disturbance
Yang Jun (author) / Gao Yubing (author) / Liu Shiqi (author) / Peng Yanghao (author) / Zhang Hongwei (author)
2018
Article (Journal)
Electronic Resource
Unknown
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Failure Mechanism of Anchored Roadway Surrounding Rocks under Near-Field Dynamic Disturbance
| Springer Verlag | 2024
Failure Mechanism of Anchored Roadway Surrounding Rocks under Near-Field Dynamic Disturbance
| Springer Verlag | 2024