The Dynamic Response and Failure Model of Thin Plate Rock Mass under Impact Load

Li, Feng; Dong, Xinhui; Wang, Yue; Liu, Hanwu; Chen, Chuang; Zhao, Xin

doi:10.1155/2021/9998558

Cited by 7 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The extreme values of the amplitude curves of these three action points showed two stages as follows: rst increasing and then decreasing; the vibration curves of 2# and 4# action points reached the peak after 2.25 cycles, and that of 6# action point the peak after 1. 25 Effective vibration modes and predominant frequency of interface vibration under impact load. Based on Hilbert Huang transform (HHT), the interface vibration waveforms were decomposed by EEMD [20][21][22][23],…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Vibration response of the interfaces in multi-layer combined coal and rock mass under impact load

Wang

Xiang

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The stress wave generated by impact or dynamic load would have significant reflection and transmission at the rock-coal or rock-rock interfaces in the process of propagation, resulting in dynamic effects such as dynamic tensile, stress superposition and mutation. These dynamic effects would lead to obvious vibration at the interfaces which is a key factor leading to dynamic damage and failure of coal and rock mass. In the process of underground engineering excavation, the dynamic damage of a series of layered rock masses is the important factor causing geological disasters. Based on the two-dimensional similar material simulation experiment, the coal and rock mass combined by five layers of fine sandstone, medium sandstone, coal, coarse sandstone and mudstone is taken as the research object, single and multi-point excitation (synchronous / step-by-step) were used to test the time-history vibration curves of rock-coal and rock-rock interfaces under impact load. It was concluded that the change of extreme value of vibration amplitude presented two stages: first increase and then attenuation. Most of them needed 2.25 cycles to reach the peak value, and the dynamic attenuation of amplitude conformed to the law of exponential. Based on Fast Fourier transform (FFT), the spectrum structures of amplitude-frequency of interfaces vibration were studied, and the two predominant frequencies were 48.9Hz~53.7Hz and 92.4Hz respectively. Based on Hilbert-Huang transform and energy equation, 5~7 vibration modes (IMF) were obtained respectively by decomposing the time-history curves. The three modes IMF1、IMF2、IMF3 contained high energy and were effective vibration modes. IMF2 accounted for the highest proportion and was the main vibration mode whose predominant frequencies were concentrated in 45.6Hz~50.2Hz. Therefore, IMF2 played a decisive role in the whole vibration process and had an important impact on the dynamic response, damage and failure of coal and rock mass. In real condition, the actual predominant frequencies could be converted according to the size and mechanical properties of coal and rock mass, and the vibration response characteristics of the interfaces between coal and rock mass under impact load were preliminarily revealed.

show abstract

Section: Resultsmentioning

confidence: 99%

“…combined with energy formula: , the energy distributions and marginal spectrum of the decomposed waveforms were obtained [24][25].…”

Section: Resultsmentioning

confidence: 99%

Vibration response of the interfaces in multi-layer combined coal and rock mass under impact load

Wang

Xiang

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…These dynamic effects lead to obvious vibration at the interfaces, which is a key factor leading to dynamic damage and failure of coal and rock mass [13][14][15][16]. Meanwhile, Li et al demonstrated that the initial location of damage and failure can be determined by the lowest frequency effective vibration mode [17]. These articles illustrate that the study of coal rock vibration signals can help to initially reveal the vibration response characteristics of the coal rock interface under impact loading.…”

Section: Introductionmentioning

confidence: 99%

Vibration Response of the Interfaces in Multi-Layer Combined Coal and Rock Mass under Impact Load

Wang

Xiang

et al. 2023

Processes

View full text Add to dashboard Cite

The stress wave generated by impact or dynamic load will produce significant reflection and transmission at the rock coal or rock interface during the propagation process. This will produce dynamic effects such as dynamic tensile, stress superposition and mutation. These dynamic effects will lead to obvious vibration at the interfaces, which is a key factor leading to dynamic damage and the failure of coal and rock mass. In the process of underground engineering excavation, the dynamic damage of a series of layered rock masses is one of the important factors causing geological disasters. Based on the two–dimensional similar material simulation experiment, the coal and rock mass combined of five layers of fine sandstone, medium sandstone, coal, coarse sandstone and mudstone was taken as the research object, and single and multi-point excitation (synchronous/step-by-step) were used to test the time–history vibration curves of rock–coal and rock–rock interfaces under impact load. It was concluded that the change of extreme value of vibration amplitude presented two stages: first increase, and then attenuation. Most of them required 2.25 cycles to reach the peak value, and the dynamic attenuation of amplitude conformed to the law of exponential. Based on Fast Fourier transform (FFT), the spectrum structures of the amplitude–frequency of interface vibration were studied, and the two predominant frequencies were 48.9~53.7 Hz and 92.4 Hz, respectively. Based on the Hilbert-Huang transform and energy equation, 5~7 vibration modes (IMF) were obtained by decomposing the time–history curves. The three modes, IMF1, IMF2, and IMF3, contained high energy and were effective vibration modes. IMF2 accounted for the highest proportion and was the main vibration mode whose predominant frequencies were concentrated in 45.6~50.2 Hz. Therefore, IMF2 played a decisive role in the whole vibration process and had an important impact on the dynamic response, damage and failure of coal and rock mass. In real conditions, the actual predominant frequencies can be converted according to the size and mechanical properties of the coal and rock mass, and the vibration response characteristics of the interfaces between coal and rock mass under impact load were preliminarily revealed. This study can provide reference for monitoring and early warning of coal and rock dynamic disasters, prevention and control of coal and gas outburst and technical development.

show abstract

“…However, due to the limitation of the research subjects of the isotropic plastic materials, this works only considered the thickness distortion and ignored the inherent capability of width distortion. Based on the framework, Li et al [27] further expanded the application scope to obtain the similarity of isotropic elastic-plastic coupling situation. Meanwhile, Davey et al [28] developed a scaling system with width and thickness distortion for isotropic and anisotropic elastic materials based on equation analysis method.…”

Section: Introductionmentioning

confidence: 99%

Similarity laws of geometric and material distortion for anisotropic elastic plate subjected to impact loads

Wang,

Chang,

et al. 2023

International Journal of Impact Engineering

View full text Add to dashboard Cite

The Dynamic Response and Failure Model of Thin Plate Rock Mass under Impact Load

Cited by 7 publications

References 15 publications

Vibration response of the interfaces in multi-layer combined coal and rock mass under impact load

Vibration response of the interfaces in multi-layer combined coal and rock mass under impact load

Vibration Response of the Interfaces in Multi-Layer Combined Coal and Rock Mass under Impact Load

Similarity laws of geometric and material distortion for anisotropic elastic plate subjected to impact loads

Contact Info

Product

Resources

About