Results 181 to 190 of about 3,077,132 (240)

Oxidative DNA damage in peripheral blood lymphocytes of coal workers

International Archives of Occupational and Environmental Health, 1995
Reactive oxygen species are important mediators of both mineral dust-induced (malignant) lung disease and in vitro DNA damage. Therefore, we studied in vivo oxidative DNA damage in coal workers who had been chronically exposed to silica-containing dust.
R P, Schins, P A, Schilderman, P J, Borm
openaire   +2 more sources

The mechanism of damage in gas-bearing coal–rock combination bodies and gas seepage in coals

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
ABSTRACTWith the gradually exhausted shallow coal resources, many coal mines have been carried forward to the deep mining stage.
Feng Du, Kai Wang, Gongda Wang, Yao Huang, Liangping Yi   +4 more
openaire   +1 more source

Influence of coal seam floor damage on floor damage depth

Environmental Earth Sciences, 2022
Xiaoge Yu, Yifei Liu, Haibin Fan
openaire   +1 more source

Deterioration evolution mechanism and damage constitutive model improvement of sandstone–coal composite samples under the effect of repeated immersion

The Physics of Fluids
Underground reservoirs in coal mines, consisting of goafs (By goaf, we mean the space that remains underground after the extraction of valuable minerals), are commonly utilized for mine water storage and drainage, with their primary load-bearing ...
Tianqi Jiang, Chun Zhu, Yang Qiao, T. Sasaoka, H. Shimada, A. Hamanaka, Wei Li, Bing Chen   +7 more
semanticscholar   +1 more source

Damage to underground coal mines caused by surface blasting

International Journal of Surface Mining, Reclamation and Environment, 1993
ABSTRACT An investigation of the potential damage to underground coal workings as a result of surface blasting is described. Seismometers were installed in a worked out area of an underground mine, and the vibrations caused by nearby surface blasting recorded. These measurements were used to derive peak particle velocities.
A.B. Fourie, R.W. Green
openaire   +1 more source

Coal Permeability Damage Caused by Production Pressure Difference

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2012
Abstract Due to the special physical and mechanical properties and gas production mechanism of coal reservoirs, the changes of their physical properties are different from those of conventional reservoirs during the coalbed methane development process, of which the dynamic change in permeability is the most significant.
S. Tao, Y.-B. Wang, D.-Z. Tang, H. Xu, Y.-M. Lv   +4 more
openaire   +1 more source

Study on the Coal Damage and Fracture Mechanism under Multiple Actions of Blasting Stress Wave

The Arabian journal for science and engineering, 2021
Huaibao Chu, Xiaolin Yang, Chang Wang, W. Liang   +3 more
semanticscholar   +1 more source

Microscopic damage field in coal induced by water jets

Journal of Loss Prevention in the Process Industries, 2018
Abstract This paper uses experiments and simulations to investigate the fragmentation process of coal subjected to water jets. The experiments are conducted using computed tomography (CT) and digital image processing technology to reconstruct the damage field of an impacted coal core, and a numerical model is established based on the arbitrary ...
Yongzhi Xue, Hu Si, Zili Yang, Dayang Xu
openaire   +1 more source

Investigation into the nonlinear damage model of coal containing gas

Safety Science, 2012
By taking the nonlinear deformation properties of coal into consideration, the nonlinear constitutive equation was founded. And in view of the compressible property of gas, the idea of compressive energy of gas was introduced. According to the continuous damage theory and mesoscopic damage theory, it is assumed that the damage variable has a power ...
Xiaobin Yang, Yongjun Xia, Xiaojun Wang
openaire   +1 more source

Fatigue damage evolution of coal under cyclic loading

Arabian Journal of Geosciences, 2018
The experimental study of fatigue damage to coal under cyclic loading is important for guiding the design of pillars in underground coal mines where the pillars may be affected by repeated mining activity. In this paper, the strength, deformation, energy dissipation, and fatigue of samples of coal from a mine in China are studied using cyclic loading ...
Yong-Jie Yang, Lu-Yi Xing, Hui-Qiang Duan, Lei Deng, Yan-Chao Xue   +4 more
openaire   +1 more source