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The north double-track railway crosscut is excavated through several strata, and the lithology is the fifth coal (0.4~0.6 m thick), Al mudstone (1.8~2.1 m thick), shale (7.6~9.1 m thick), the sixth coal (0.6~0.8 m thick) and fine-grained sandstone (6 m thick).
Tab.2 Main technical parameters of injection pump Air source pressure 0.5-0.63 MPa Air consumption 50 m3/h Grout pressure 7 MPa Grout volume 60 L/min Cylinder diameter 150 mm Machine quality 17.1 kg 2) Burden Based on the number of grouting holes to determine the amount of water, add water to the barrel spices, starting blender stirring slowly, and then based on the water-cement ratio (1:3) ,add 425# cement and ACZ-supplement slowly, add and whip at the same time, grout after mixing well. 3) Grouting (1) Remove the wire of the end anchor, connect the grouting device to the internal thread of anchor, tighten the grouting slowly, and then connect grouting pipe with the injection pump

To simplify the mathematical planning of experiments and to reduce the number of varying factors it was experimentally confirmed that the amount of added active granulated aggregate and the amount of water may be considered the most critical optimization parameters characterizing density, porosity, compression strength, heat conduction and water absorption [16].
[10] Strokova V.V., Ogurtsova Yu.N., Botsman L.N., Influence of active component characteristics on the degree of impregnation of fine-grained concrete during epicrystallization modifying, Bulletin of Belgorod State Technological University named after V.G.

This results in the production of a number of large section, great depth, large flat, super close-ups of the projects.
The surrounding rock mainly consists of medium grain adamellite with huge phenocrysts, and the mechanical parameters of the surrounding rock and the surrounding rock relevant seepage flow parameters are listed in Table 2 when the coupling problem is considered in numerical simulation.

Its products have compact organization, being grained refining, less interior defects and higher quality.
When the thermal fatigue crack forming, along with the increase of cycle number, some small cavities will appear near the crack tip and gradually form micro cracks, and continue to expand amalgamated with the initial main crack, finally cracks are mutually connected to form a crack shaped as mesh or "claw" to cause the mold failure.

Solid KOH grains were put into a crucible (Ni; diameter of approximately 30 mm, depth of 30 mm) and melted at 690℃.
However, after the second PCVM process, the number of etch pits did not increase; only the same etch pits, in the same sites, were present.

Solid-state-recycled Mg alloys show high strength due to the refinement of grains induced by dynamic recrystallization during hot extrusion.
As AZ91 alloy is the most widely used among commercial Mg alloys, it is assumed that a large number of AZ91 chips come from the domestic market.

Reports are also given that the ultrafine or nanoparticle titanium dioxide has been used as photo-stabilizer for a number of polymers subject to UV lights of shorter wavelengths (300-380nm) [6].
The composition of the crystal phase and size of crystal grains were analyzed by X-ray diffraction (XRD) with a diffractometer (D/max-RA model, Rigaku, Tokyo, Japan) employing Cu Kα radiation.

Lastly, the failure mode is a number of T-joints formed plasticity rings, and the damage mode is the cracking of T-joint.
Yan, Laser-TIG hybrid welding of ultra-fine grained steel, J.

Experimental Program Mixture of SFRC consists of fine-grained concrete, with resistance to frost and sprinkler salts, certified for contact with drinking water and stone fraction up to 4 mm, intended for general and construction purposes [20] and reinforced with steel fibers MasterFiber 482 [21] by suction at a dose of 60 kg/m3 and 90 kg/m3 and water.
Acknowledgements This article was created with the financial support of the Ministry of Education, Youth and Physical Education, specifically the Student Grant Competition of VSB-TU Ostrava under the identification number SP2023/058.

The name Twinning Induced Plasticity reflects the main characteristics of deformation mechanism of this steel, i.e. a large number of twinning occur during plastic deformation.
The grain boundaries arising from the twinning deformation result in extreme high strength increase.