Study on the damage law of coal rock affected by different alternating periods of cold and heat [PDF]
Meitan kexue jishu, 2023 Temperature is an important factor affecting the physical properties of coal and rock, and as a solid medium, coal and rock have the properties of thermal expansion and contraction.
Hewan LI +4 more
doaj +2 more sources
Research Progress of Coal Damage under Unsteady Load in China
Geofluids, 2021 Coalbed methane mining, suppression of coal dust, and elimination of dynamic disasters are closely related to the expansion of coal body cracks and internal damage. Understanding the expansion mechanism of pore-cracks is critical to investigate coal body
Xi Chen +3 more
semanticscholar +2 more sources
Meitan xuebaoAbundant coal and coalbed methane resources are endowed in the vast basins of China. Mining disturbance alters the primary stress and fracture fields, thereby impacting the transportation and distribution of coalbed methane as well as gas extraction ...
Tong ZHANG +6 more
doaj +2 more sources
Study on the effect of moisture on mechanical properties and impact energy index of coal
Meikuang Anquan, 2023 Coal destruction is an energy-driven destabilization phenomenon. In order to investigate the effect of moisture on energy accumulation and dissipation during coal destruction, uniaxial compression tests on coal samples with different water content states
ZHANG Junjie, YUAN Xinli, ZHANG Hanqiao, CHEN Yi, HAN Guoqing, NIAN Guoxing
doaj +2 more sources
Deformation and damage dynamic characteristics of coal–rock materials in deep coal mines [PDF]
International Journal of Damage Mechanics, 2017 The deformation and damage characteristics of surrounding rock grow gradually with the increase of mining depth, and the mechanical behavior and damage mechanism of coal–rock materials vary greatly. In order to reveal the deformation and damage dynamic characteristics of coal–rock materials in deep mines, the macroscopic deformation characteristics of ...
Jiankun Xu +5 more
openaire +2 more sources
Micro-damage model of gas-bearing coal under load and instability identification criteria [PDF]
Meitan xuebaoThe distribution of pores and skeletons within coal reservoirs significantly affects the migration of gases and the occurrence of gas dynamic disasters. To further explore the micro-damage mechanisms in gas-containing coal, a detailed study of the micro ...
Baisheng NIE +10 more
doaj +2 more sources
Mechanical properties and damage constitutive model of coal with different water content based on energy principle [PDF]
Meitan kexue jishuIn order to explore the energy evolution law and damage evolution characteristics of coal and rock mass in the process of deformation and failure under different water content, the uniaxial compression test of coal and rock mass in Shuangma No.1 Coal ...
Yongjiang YU +4 more
doaj +2 more sources
Influence of Incremental Impact on the Damage of Coal-Rock under Unidirectional Constraint
Advances in Civil Engineering, 2019 Taking the briquette sample as research object, the influence of the incremental impulse (momentum) on the damage of coal-rock under different uniaxial axial pressure was studied by using the self-developed pendulum impact dynamic loading test device ...
Hongbao Zhao +4 more
doaj +2 more sources
Influence of pore-fracture structure characteristics of coal rock on its damage evolution law [PDF]
Meitan kexue jishuThe development and expansion of fractures in coal rocks are the primary causes of mining disasters, such as gas outbursts, rock bursts, and instability of coal pillars.
Yiqing ZHAO +5 more
doaj +2 more sources
Experimental study and application of hydraulic fracturing in underlying coal seam [PDF]
Meitan kexue jishuThe coalbed methane resource under goaf is rich, but has not been effectively developed for a long time. Hydraulic fracturing technology stands as an effective means to augment coalbed methane recovery.
Yongxin LU +7 more
doaj +2 more sources