Study on the dynamic response and the hazard of rock burst under the influence of fault slip

Kong, Peng; Liu, Rong; Xing, Luyi; Li, Zhihong; Xu, Chuanwei; Zhang, Zhongteng

doi:10.3389/feart.2022.1034332

Cited by 7 publications

(3 citation statements)

References 27 publications

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“…The simulation of the source induced by hard roof breaking provides a basis for us to more accurately study the dynamic response characteristics of roadway. It is important to note that during dynamic analysis, the boundary conditions of the model are changed from fixed boundary conditions to static boundaries to eliminate refraction and reflection of dynamic stress waves at the model boundaries 27 . The research shows that using local damping to simulate the dynamic analysis of rock mechanics can achieve ideal results, and the local damping of rock is generally 2–5%, so the local damping is selected as 5% in the dynamic calculation 28 .…”

Section: Simulation Methodologymentioning

confidence: 99%

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Peng,

Chang,

Dechuan

et al. 2024

Sci Rep

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Under the condition that the working face was directly covered with hard roof, the abrupt breaking of hard roof release significant amount of energy, thus prone to triggering dynamic disasters such as roadway instability or rockburst. This paper based on the engineering background of the Xieqiao Coal Mine's 11,618 working face, a numerical simulation method was put forward to study the dynamic response of roadway under the disturbance of hard roof breaking and proposed an evaluation index IC for roadway stability. Research indicates that the elastic energy released during the periodic weighting of the hard roof is higher than that released during the first weighting. Under the dynamic disturbance caused by hard roof breaking, the peak stresses of the roadway was slight decreased, accompanied by a significant increase in the range of stress concentration and plastic zone expansion. Roadway deformation patterns are significantly influenced by hard roof breaking, with noticeable increases in deformation on the roof and right side. During the period of hard roof breaking, the possibility of instability of the roadway increase significantly due to the disturbance caused by the dynamic load. The research results reveal the instability mechanism of roadway under the condition of hard roof, and provide a more reliable basis for evaluating the stability of roadway.

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Section: Simulation Methodologymentioning

confidence: 99%

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Peng,

Chang,

Dechuan

et al. 2024

Sci Rep

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“…Cao et al 10 selected rockburst cases and studied the entire failure process of rockbursts through largescale numerical simulations, revealing the disaster-incubating mechanism of rockbursts. Kong et al 11 systematically investigated the evolution mechanism and hazard of rockburst events induced by fault slip under the influence of dynamic loads using various research methods, including field investigations, physical experiments, theoretical analysis, and numerical simulations. Song et al 12 coupling analysis of theoretical analysis, numerical simulation, and physical experiment, Cai et al 13 determined that the interaction between discontinuous structure and mining activity is the key factor that dominates the reactivation of faults and may induce rockburst.…”

Section: Introductionmentioning

confidence: 99%

Study on the Impact Failure Rules of Roadway Floor Induced by Dynamic Load Disturbance under Extremely Thick Conglomerate

Xu,

Dai,

2024

ACS Omega

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The dynamic load resulting from the fracture of extremely thick rock layers directly influences the surrounding rock layers within stopes and roadways, thereby inducing rockburst disasters. Hence, studying the tunnel floor's impact and ground pressure induced by dynamic load disturbance under extremely thick conglomerates is crucial. This study focuses on the 23130 working face of Yuejin Coal Mine as its engineering background. Initially, through similar simulation experiments, the impact characteristics of dynamic load disturbance positions under thick conglomerates on tunnel bottom damage are investigated. Building upon this foundation, finite element numerical simulation is employed to explore the further conglomerate thickness' impact on tunnel floor damage under dynamic load disturbance. Lastly, the accuracy of similar and numerical simulation results is validated by incorporating field examples. Findings reveal that dynamic load disturbance leads to an instantaneous increase in coal and rock mass acceleration in the roof and floor of roadways, followed by a decrease to an equilibrium state, thereby subjecting the interior to high static load conditions. The thickness of conglomerate in the overlying rock layer emerges as a crucial factor affecting tunnel floor rockburst incidents. With dynamic load disturbance, as conglomerate thickness increases, the stress concentration area of the tunnel floor gradually shifts to deeper rock strata. Effective control of tunnel floor rockbursts can be achieved by implementing support measures like anchor rods and cables and managing tunnel deformation and damage under dynamic loads. Dynamic load disturbance under extremely thick conglomerates emerges as a pivotal condition for inducing tunnel floor impact damage. This study provides a theoretical foundation for the safe excavation of similar mine tunnels and for implementing rockburst prevention and control measures.

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“…When coal is close to a fault structure, coal stress increases, and a rock burst is easily induced [9][10][11]. In Central and Western China, coal mining is characterized by thick roofs, large mining depths, high ground stresses, and complex structural conditions which may lead to rock burst disasters.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Rock Burst Mechanism in Extra-Thick Coal Seam Controlled by Thrust Fault under Mining Disturbance

Yang,

Wei,

Chen

et al. 2024

Processes

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A fault is a common geological structure encountered in underground coal mining. Interactions between the discontinuous structure of a fault and mining activities are the key factors in controlling the rock bursts induced by the fault. It is of great importance to study the rock burst mechanism of an extra-thick coal seam under the combined influence of reverse faults and coal mining for the prediction and prevention of rock burst. In this study, we establish a sliding dynamics model of rock mass in a fault zone and analyze the mechanical distribution of fault-induced rock bursts under the combined action of mining disturbances. Additionally, we utilize theoretical calculation and a 3D numerical simulation method to clarify the rockburst mechanism in an extra-thick coal seam controlled by a thrust fault under mining disturbance and a fault. The results showed that the distribution range of the shear stress increment in the fault footwall was larger than that in the hanging wall, revealing a skewed distribution. The fault dip angle and mining thickness exhibit significant influence on the structure around the fault. With increases in the dip angle of the fault and mining thickness, the maximum vertical stress and peak stress first increase and then decrease. A position 80 m away from the fault is the dividing line between the fault-non-affected area and the fault-affected area. The 13,200 working face of the Gengcun coal mine is used as a case study to study the influence of mining disturbances on microseismic events. The results of this study are in good agreement with the theoretical calculations and numerical simulation results.

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Study on the dynamic response and the hazard of rock burst under the influence of fault slip

Cited by 7 publications

References 27 publications

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Study on the Impact Failure Rules of Roadway Floor Induced by Dynamic Load Disturbance under Extremely Thick Conglomerate

Analysis of Rock Burst Mechanism in Extra-Thick Coal Seam Controlled by Thrust Fault under Mining Disturbance

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