Dynamic modelling of a mining-induced fault slip

Sainoki, Atsushi; Mitri, Hani S.

doi:10.1201/b15683-130

Cited by 2 publications

(1 citation statement)

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“…As their findings revealed, the stress distribution characteristics and intensity of faults were reflected by the presence or absence of acoustic emission events. Sainoki et al [22] conducted numerical simulations using FLAC 3D and concluded that under the influence of mining, the shear displacement of the fault plane changes. According to their findings, the shear displacement is closely affected by the mining depth, the fault friction angle, and the relative position between the fault and coal seam, while the fault stiffness and expansion angle have little influence on it.…”

Section: Introductionmentioning

confidence: 99%

Study on Failure Mechanism of Roadway Surrounding Rock and Hierarchical Continuous Support Technology in Unidirectional Fault Area

Xie,

Mu,

Guo

et al. 2023

Processes

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A fault is a common geological structure in coal mining. Large deformation or even instability and collapse often occur in roadways in fault areas, which restricts the safe and efficient production of mines. With the track roadway of the 5206 working face of Xin’an Coal Mine as the engineering background, this study aims to explore the failure mechanism of surrounding rock under the influence of fault structures. Field investigation and numerical simulation were used comprehensively to analyze the failure characteristics of the surrounding rock under the influence of a unidirectional fault structure. Based on the principle of thick-layer transboundary anchorage, the hierarchical continuous support technology of transboundary anchoring in the fault structure area was proposed. The results show that the stress near the fault area is relatively concentrated, and the rock mass strength is low, which may easily cause the deformation and failure of the surrounding rock under the dynamic stress response. Using the new technology to reconstruct the bearing structure of the broken surrounding rock mass, the deformation of the surrounding rock can be effectively restrained. According to the monitoring feedback, the roadway deformation in the roof and two sides is reduced by 68.5% and 35.4%, respectively; and the maximum evolutionary depth of the roof crack is reduced to 3.5 m from 7.5 m in the original support scheme. Moreover, this study also explored the necessity of wedge anchorage for corner anchor cables and the deformation characteristics of surrounding rock at different fault dip angles. These results provide an important reference for the maintenance and control of coal roadways under the influence of unidirectional fault structures.

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Section: Introductionmentioning

confidence: 99%