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Influencing Factors on the Output of Coal Fines There are static factors and dynamic factors summarized on the basis of the division of coal fines, as Fig.1 shows.
Static factors Dynamic factors Output influencing factors of coal fines Drilling engineering Reservoir reconstruction Drainage Coal petrography Coal structure Coal seam Fig 1 Output influencing factors of coal fines The Characteristics of Coal Petrography.
Due to the mechanical properties of the coal which has a low Young's modulus and a high Poisson's ratio, coal could deform at lower temperatures and weaker tectonic stress.
The mechanical properties of coal depend on its material composition, coal rank, and water saturation.
Macroscopic type of coal can reflect the material composition of the coal to a certain extent, and different lithotypes have different mechanical properties.

CNT is a considered as the strongest and most resilient material known in additional to astonishing mechanical properties, Eltaher et al. [1].
Defects such as pentagons, heptagons, vacancies, or dopant are found to modify drastically the mechanical, electrical and chemical properties of these nano systems.
It is also noted that, the length and vacancy defect will affect on the modal participation factors and hence on vibrational modes.
Forro, W., Benoit, , & L., Zuppiroli, “Mechanical properties of carbon nanotubes”, Applied Physics A, 69(3), (1999), pp. 255-260
H., Esbati, & S., Irani, “Probabilistic mechanical properties and reliability of carbon nanotubes”, Archives of Civil and Mechanical Engineering, 18(2), (2018), 532-545

The mechanical properties of gas hydrate-bearing sediments are important basic parameters during natural gas hydrate drilling and exploitation.
ZL 2010 2 0253067.3) to study the variation of mechanical properties along with gas hydrate saturation in different sediments.
The key factors to influence the borehole stability include petro-physical and mechanical properties and hydrate dissociation of hydrate-bearing strata.
The mechanical properties of hydrate-bearing sediment are researched mainly by field survey, laboratory test, and theoretic model analysis.
Thus, artificial synthetic specimens are generally used for indoor experimental research on the mechanical properties of hydrate sediment.

Microstructures and mechanical properties and their changes with some factors are briefly introduced.
The factors are included in melting, heat treatment, surface treatment, and so on.
Excellent mechanical properties can be obtained when H13 steel is tempered at 550-650 oC.
The surface treatment can be used to improve the surface mechanical properties of H13 steel and enhance its service life.
Wang, et al, Effects of heat treatment on mechanical properties of H13 steel, Metal Science and Heat Treatment, 52(2010)393-395

Two major challenges in relation to laser welding are abrupt change in metallurgical aspects and actual assessment of the mechanical properties due partly to very narrow heat affected zone (HAZ) and partly to high mechanical properties gradient.
Estimations of microstructure and mechanical properties of the simulated HAZs of an ultrafine grain steel imposed by laser welding with or without post-weld laser tempering were performed.
The actual mechanical assessment of laser welds remains problematic as impact properties can not be measured by the standard techniques due to fracture path deviation phenomenon in Charpy testing of a very narrow weld [6-7].
The main objective of this study is to examine the mechanical and metallurgical behavior of the HAZ of laser welding of ultrafine bainitic ferrite steel by reproducing the thermal cycles and enlarging the volume of the heat affected zone on Gleeble simulator.
Combination of these factors is responsible for evolution of mechanical properties of the ultrafine bainitic ferrite steel imposed by laser welding thermal cycle and subsequent laser tempering thermal cycles.

The two as-cast alloys exhibit good tensile mechanical properties.
Main factors affecting DRX include deformation temperature, speed and degree [14].
Xu, Microstructures and mechanical properties of ZK60-xHo wrought magnesium alloys, Mater.
Xu, Microstructures and mechanical properties of Mg-Zn-Zr-Dy wrought magnesium alloys, Bull.
Li, Microstructure and mechanical properties of ZK60-Yb magnesium alloys, Mater.

These factors can contribute to a reduction in product strength.
Additionally, several factors influence the mechanical properties of the weld, particularly the hardness of the material in the welded area.
Table 1 presents the chemical composition of Alloy 6061, while Table 2 outlines its mechanical properties.
Mechanical Properties of A6061-T6 Alloy [10].
Hafidzal, “Effect of heat treatment on microstructure and mechanical properties of 6061 aluminum alloy,” J.

The mechanical properties of Mg-Zr-Ca alloys are determined from compressive tests, the corrosion behavior is studied using immersion tests, and biocompatibility is evaluated by cell growth factor using osteoblast-like SaOS2 cell.
Mechanical property test.
Compressive properties.
Therefore these hot-extruded alloys can offer good mechanical properties for orthopedic applications.
It is considered that the enhanced mechanical properties of the alloys are related to finer microstructures.

The specific chemical composition and physical and mechanical properties are shown in Tables 4 and 5.
The parameters that have an important influence on the mechanical properties of glass fiber reinforced cement mortar were selected as the influencing factors.
The mechanical properties of GRC specimens were tested according to the L9 (34) orthogonal experiment table.
It shows that the volume content of fiber and the water-binder ratio have a significant effect on the mechanical properties of cement mortar, and the rubber-sand ratio has no significant effect on the mechanical properties of cement mortar.
A semianalytical approach for determining the nonclassical mechanical properties of materials.

The effect of water activation on the physical and mechanical properties of slaked and quicklime composites and the resistance to the effects of the biological environment are studied.
Water is the most important factor determining the technological properties of concrete mix.
To obtain the quantitative dependences of changes in the physical and mechanical properties of the calcareous composites under the influence of various modes of mixing water activation. 4.
The results of the study of the physical and mechanical properties of calcareous composites prepared on the activated mixing water are shown in Fig. 1 (a, b, c).
Obviously, it is precisely under these regimes that the processes are activated to a greater extent affecting the calcareous composite structure formation.