Results 41 to 50 of about 1,809 (225)

Stress analysis of crack characteristic of anthracite under dynamic loading

Deep Underground Science and Engineering, EarlyView.
In this article, the dynamic compression test of anthracite under five strain rates is carried out, the evolution law of three kinds of crack characteristic stress is analyzed, and a prediction model of the crack characteristic stress threshold considering the strain rate effect is established. Then, the rationality of crack characteristic stress under
Yun Bai, Feng Gao, Ning Luo, Zhizhen Zhang, Yue Niu, Shanjie Su   +5 more
wiley   +1 more source

Research progress of coal and gas outburst mechanism based on geological structure

Meikuang Anquan, 2022
Aiming at the problem of coal and gas outburst in the process of coal mining in China, this paper first summarizes the research progress of coal and gas outburst mechanism, and points out that the research on outburst mechanism of tectonic belt is of ...
ZHAO Junli, WANG Wenyuan, YANG Wei
doaj   +1 more source

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

Deep Underground Science and Engineering, EarlyView.
In this article, the finite element method‐smoothed particle hydrodynamics adaptive coupling algorithm is applied to numerically simulate and analyze the dynamic response of the slit tube and the crack propagation under high in situ stress. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and ...
Zhe Sui, Liyun Yang, Lijun Wu, Chenxi Ding   +3 more
wiley   +1 more source

Research on gas irradiation feature of tectonic coal

Procedia Engineering, 2011
AbstractUsing gas-diffusion experimental installation created by Chongqing institute of coal science research institute, in different pressure conditions, studied the rule of gas diffusion in tectonically coal. Got the characteristics of the gas diffusion in tectonically coal by analysis of the experimental data, and provided the basis for the gas ...
openaire   +1 more source

Experimental and constitutive modeling investigations on marble in Jinping Underground Laboratory

Deep Underground Science and Engineering, EarlyView.
The objective of this study is to reveal the underlying mechanisms behind the brittle‐ductile transition of the marble through a combination of experimental research and constitutive modeling. A series of triaxial compression and triaxial cyclic loading tests are conducted.
Susheng Wang, Qiang Zhang, Hao Luo, Zhinan Lin   +3 more
wiley   +1 more source

A novel construction approach for the pore structure model principally focuses on the controllable roundness of rock particles

Deep Underground Science and Engineering, EarlyView.
Particle rounding effects comparison of different methods: (a), (b), and (c) are the rounding results using the B‐spline curve method with different R; (d), (e), and (f) are the results of vertex rounding substitution method with different rounding radii.
Jiabin Dong, Ning Yang, Yi Jin, Ying Wu, Dandan Liu, Junling Zheng, Jingyan Zhao   +6 more
wiley   +1 more source

Experimental Analysis of the Mechanical Properties and Resistivity of Tectonic Coal Samples with Different Particle Sizes

Energies, 2021
Because of its weak cementation and abundant pores and cracks, it is difficult to obtain suitable samples of tectonic coal to test its mechanical properties.
Congyu Zhong, Liwen Cao, Jishi Geng, Zhihao Jiang, Shuai Zhang   +4 more
doaj   +1 more source

Coal Deformation, Metamorphism and Tectonic Environment in Xinhua, Hunan

Journal of Geoscience and Environment Protection, 2018
This article discusses in detail chemical composition, molecular structure, microstructure phenomena, estimate of the palaeo-stress, paleo-temperature and the strain rate to deepen the knowledge for the correlation of coal deformation and metamorphism with structural environment in Xinhua Hunan by coal quality analysis, XRD and SEM methods, which ...
Huantong Li, Xiaoyan Zou, Jiafeng Mo, Yifan Wang, Fei Chen   +4 more
openaire   +2 more sources

Strain‐based modeling and analysis for rock blasting and geomechanics applications

Deep Underground Science and Engineering, EarlyView.
This paper introduces a novel strain‐based modeling approach for blasting and geomechanical applications, using measurable variables like particle velocity, strain, and displacement. By bypassing complex constitutive relations, strain‐based models capture critical blasting trends and full‐blast design parameters with minimal calibration.
Ruilin Yang
wiley   +1 more source

Effect of supercritical CO2 on pore structure and desorption characteristics of tectonic coal

Meikuang Anquan
In order to analyze the influence of supercritical CO2 on pore structure and desorption characteristics of tectonic coal, a high-temperature and high-pressure geological environment simulation system was used to treat primary coal and tectonic coal with ...
Fanfan NIU, Erlei SU, Jiaqi WEI, Xinyu ZHU   +3 more
doaj   +1 more source