Zobrazeno 1 - 10
of 239
pro vyhledávání: '"XUN XI"'
Publikováno v:
Fractal and Fractional, Vol 8, Iss 11, p 669 (2024)
This study investigates the effect of thermal cracking on the tensile strength of granite through a combination of experimental testing and numerical simulations. The primary objective is to understand how thermal stress, induced by heat treatment at
Externí odkaz:
https://doaj.org/article/591ae0abaa4043d39d7b3662a2b17e67
Publikováno v:
International Journal of Coal Science & Technology, Vol 10, Iss 1, Pp 1-21 (2023)
Abstract Automatic roadway formation by roof cutting is a sustainable nonpillar mining method that has the potential to increase coal recovery, reduce roadway excavation and improve mining safety. In this method, roof cutting is the key process for s
Externí odkaz:
https://doaj.org/article/18a9d51f2e0445d68c6c556f70c3a04d
Publikováno v:
Energy Science & Engineering, Vol 11, Iss 6, Pp 2202-2217 (2023)
Abstract Gob‐side entry formation by roof cutting is a new technology for no pillar coal mining, which can maximize coal resources and reduce roadway drivage ratio. However, the mechanical behavior of the formed entry is complex while it is crucial
Externí odkaz:
https://doaj.org/article/0fdd42b265214c60966d53ccc5cd1062
Publikováno v:
BMC Oral Health, Vol 23, Iss 1, Pp 1-9 (2023)
Abstract Background The purpose of this study was to assess morphological changes of the upper anterior alveolus after retraction of a maxillary incisor by applying three-dimensional (3D) superimposition of pretreatment (T1) and posttreatment (T2) co
Externí odkaz:
https://doaj.org/article/270d8d3094af44a68750126a3437d33c
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 6, p 869 (2024)
The demand for critical minerals has increased extraction activities in coastal deep mines where challenges such as high stresses, chemical corrosion, and mining disturbance impacts are present. This study investigated the effects of chemical corrosi
Externí odkaz:
https://doaj.org/article/830278ed0c904196b53f4d308d9df097
Publikováno v:
International Journal of Coal Science & Technology, Vol 10, Iss 1, Pp 1-12 (2023)
Abstract The stability of coal pillar dams is crucial for the long-term service of underground reservoirs storing water or heat. Chemical damage of coal dams induced by ions-attacking in coal is one of the main reasons for the premature failure of co
Externí odkaz:
https://doaj.org/article/39fc2dcd2671405a9f244ee997534dd5
Publikováno v:
Journal of Materials Research and Technology, Vol 22, Iss , Pp 1572-1594 (2023)
The cavity disasters induced by dynamic disturbances are hazards to the cavity safety and may cause substantial damage to the entire subsurface project. The dynamic mechanical responses of the cavern are crucially important in rock engineering design
Externí odkaz:
https://doaj.org/article/fd8bfeda87c0443eb701fb74b3aedcbb
Publikováno v:
工程科学学报, Vol 44, Iss 10, Pp 1778-1788 (2022)
In mineral and geothermal resource co-mining, the underground rock is often affected by mining stress, and fractures of different shapes, such as single fractures, T-shaped fractures, and Y-shaped fractures, are generated. To increase the reservoir p
Externí odkaz:
https://doaj.org/article/12fd83c19b41406f934596465d831472
Publikováno v:
工程科学学报, Vol 44, Iss 10, Pp 1746-1754 (2022)
Hot dry rock (HDR) is an underground rock with high temperatures (usually above 180 °C), low porosity, and low permeability. The extraction of geothermal energy from HDR generally requires the stimulation of man-made reservoirs. In the enhanced geot
Externí odkaz:
https://doaj.org/article/f63cc2a8bcdb46c394a3e4cae9e9dba3
Publikováno v:
工程科学学报, Vol 44, Iss 10, Pp 1669-1681 (2022)
With the continuous increase in mining depths for mineral resources, the high-temperature thermal damage caused by deep earth temperatures has become a critical factor that restricts the safe and efficient mining of mineral resources. High-temperatur
Externí odkaz:
https://doaj.org/article/e116e268fba3446d8c44fd9433d2b173