Results 31 to 40 of about 324,854 (212)
Alexandria Engineering Journal, 2021 In deep coal and rock mass engineering, extensive initial damage problems caused by excavation and unloading are critical to the long-term deformation and stability of underground projects.
Peng Huang +4 more
doaj +1 more source
Formalization of the General Model of the Green Economy at the Regional Level [PDF]
, 2016 The paper focuses on the study of the problems of the economic and mathematical modeling of the green economy at the regional level. The purpose of the research is the development of economic and mathematical tools for the economic and ecological systems’
Gengut, I. B. +2 more
core +3 more sources
Meitan xuebao, 2023 In the mining of nearly horizontal open-pit coal mines, transportation flat plates are usually arranged on the end-slope. Reciprocating transport operations of large heavy-duty trucks cause significant cyclic loading and unloading effects on the ...
Yanlong CHEN +5 more
doaj +1 more source
CONDITIONS OF THE CHROMOSOMAL DAMAGE IN COAL MINERS
Hygiene and sanitation, 2019 Working in coal mines, despite all achievements of modern science and technology, still remains among the most dangerous occupations to the health. The review of researches about the chromosomal damage in coal miners was performed. We searched information in the following databases - PubMed, http://www.sciencedirect.com and in the electronic library ...
Yu. E. Kulemin +4 more
openaire +1 more source
Meikuang Anquan, 2021 Uniaxial compression was performed on frozen and untreated frozen coal samples under natural and natural saturated conditions. The strength and deformation characteristics of coal samples were analyzed, and the AE characteristics and damage evolution ...
FAN Guowei, SHANG Junning
doaj +1 more source
Experimental studies on the shear resistance of original coal-shale joint [PDF]
, 2017 Purpose. Experimental study and theoretical modeling of the shear resistance of original coal-shale joint. Methods. A two-segment model was developed to describe the shear resistance-shear displacement curves obtained from the direct shear tests of ...
Dong, H, Guo, B, Wang, L
core +2 more sources
Mechanism of dilatation catastrophe of coal and gas outburst
Meitan xuebaoCoal and gas outburst mechanism, as a century old global problem, has entered a bottleneck period in its prevention and control at this stage. Faced with the continuous occurrence of outburst accidents, it is still difficult to answer numerous scientific
Chaojie WANG, Xiaowei LI
doaj +1 more source
Damage law and mechanism of coal-rock joint structure induced by liquid nitrogen at low temperature
Scientific Reports, 2022 The width and degree of connectivity of coal-rock joints directly affect the seepage capacity of flow energy such as gas. To study the damage law and mechanism of the coal-rock joint structure under the action of liquid nitrogen, two methods of liquid ...
Hewan Li +4 more
doaj +1 more source
矿业科学学报, 2023 This experimental study probes into the evolution patterns of fine damage and mechanical and seepage characteristics of coal rocks using the coal rock triaxial servo experiment system by employing three types of pretreatment methods, namely heating ...
Qi Xiaoghan +5 more
doaj +1 more source
Damage characteristics and energy storage evolution law of coal with pressure relief borehole
Meitan kexue jishuIn the environment of deep strong mining-induced stress, phenomena such as borehole collapse, closure and compaction are prone to occur in large-diameter pressure relief boreholes in coal seams, and the pressure relief effect shows obvious time-effect ...
Yanchun YIN +5 more
doaj +1 more source