Numerical simulation of roadway deformation and failure under different degrees of dynamic disturbance

Jia, Ce; Li, Sheng; Fan, Chunhua; Rong, Hai; Yang, Lei; Pu, Ziang

doi:10.1038/s41598-022-24128-2

Cited by 4 publications

(2 citation statements)

References 43 publications

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“…According to Equations ( 8) and (10), the radial displacement of the road caused by the different degrees of the attenuation stress wave is: The total displacement potential function of the roadway-surrounding rock under P-wave disturbance is as follows [34]:…”

Section: Dynamic Response Of Rock Mass Surrounding the Roadway Under ...mentioning

confidence: 99%

“…The dependence between wave velocity and stress in elastic and non-elastic stage was studied in the paper [9]. Jia et al [10] conducted FLAC3D simulations to analyze roadway deformation and failure under different dynamic disturbances and how significantly dynamic stress influences roof deformation. Han et al [11] studied the dynamic fracture behavior of rock materials and found that increasing dynamic load will promote crack initiation and propagation.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Mitigation Effect of Overlying Weakening Strata in Underground Coal Mines

et al. 2023

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Artificial construction of a weakening zone over the roadway is an essential method for preventing coal bursts and rock bursts caused by strong mining tremors. However, concerning the seismic absorption and load reduction capabilities of an artificial structural weakening zone, the degree of rock mass damage to the roadway under weakening zone protection remains unclear. This study employed principles of elasticity and UDEC (Universal Distinct Element Code) to explore the seismic attenuation and load reduction capabilities of the weakening zone. The results indicate that the absorbing ability of the weakening zone increases exponentially with its weakening coefficient. Under the same dynamic load disturbance, when the weakening coefficient rises from 0.00 to 0.99, the sidewall displacement from the elastic wave source side changes from 0.400 m to 0.228 m. The total number of cracks in the roadway-surrounding rock, and the ranges of overstressed zones decreased linearly. The critical threshold of the roadway resisting the mining tremor disturbance increased. In particular, when the mining tremor is located directly above the roadway, the initial deformation of the roof is the largest, and the cumulative deformation of the rib is greater than the roof. By creating a weakening zone with a coefficient exceeding 0.95, the roadway remains unaffected by the 20 MPa dynamic loading. The study provides a theoretical basis for controlling coal burst that is triggered by mining tremors.

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Section: Dynamic Response Of Rock Mass Surrounding the Roadway Under ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Mitigation Effect of Overlying Weakening Strata in Underground Coal Mines

et al. 2023

View full text Add to dashboard Cite

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Analysis of Rock Mass Parameters and Plastic Zone of a Tunnel in Southwest Mountainous Area

Wang,

Zhang,

Ren

et al. 2023

KSCE J Civ Eng

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An innovative destressing technology and key parameters determination in both sides of a deep roadway

Jiang

Chen

Xie

2023

Sci Rep

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The general or single supporting theory and technology of the shallow surrounding rock of the roadway are not suitable for solving the problem of continuous large deformation of the both sides under the continuous migration of coal mass in the deep domain of the roadway side. Furthermore, the general destressing technology of dense drilling in the roadway destroys the shallow anchorage domain while releasing the stress. Therefore, this study proposes the “shallow supporting and deep destressing” synergism technology. This technology provides puissant supporting in the shallow domain of roadway sides, and at the same time, large destressing holes are excavated at the coal mass migration channel in deep stress peak domain far from the anchorage domain, conducting destressing regulation of roadway sides. This technology can shift stress peak domain of the roadway side to solid coal side of destressing hole without destroying the shallow anchorage domain, and at the same time, provide a buffer space for that coal mass in the deep domain of the roadway side continuously migrates to the anchorage surrounding rock, creating a beneficial stress circumstances for the roadway stability. The “shallow supporting and deep destressing” synergism technology can solve the contradiction between the shallow surrounding rock supporting and the continuous migration of coal mass in deep domain. The field application results show that the innovative destressing technology can effectively solve the problem of surrounding rock control in deep roadway.

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Numerical simulation of roadway deformation and failure under different degrees of dynamic disturbance

Cited by 4 publications

References 43 publications

Seismic Mitigation Effect of Overlying Weakening Strata in Underground Coal Mines

Seismic Mitigation Effect of Overlying Weakening Strata in Underground Coal Mines

Analysis of Rock Mass Parameters and Plastic Zone of a Tunnel in Southwest Mountainous Area

An innovative destressing technology and key parameters determination in both sides of a deep roadway

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