Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Chuanxin Rong"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-15 (2024)
Abstract To investigate the dynamic mechanical behavior and energy dissipation characteristics of low-temperature rock samples under cyclic impact loading, a temperature-controlled impact system that combines Hopkins bars with a low-temperature compe
Externí odkaz:
https://doaj.org/article/cf95e455d06b47708fdcd29effd6614b
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-24 (2024)
Abstract To reveal the velocity distribution law of a gas lift reverse circulation well washing flow field in drilling shaft sinking, a velocity mathematical model of well washing flow field is established. The theoretical analytical solutions and ve
Externí odkaz:
https://doaj.org/article/0b42d1415fdb49ef8c87fff45be9779b
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-17 (2024)
Abstract Existing deep foundation pit support structures are commonly composed of external earth-retaining structures, internal horizontal bracings, and vertical columns. A closed bracing system, often formed by a horizontal support through a bracket
Externí odkaz:
https://doaj.org/article/2bb883bbeb514d36ba11ab1c2a0ce16d
Publikováno v:
Meitan kexue jishu, Vol 52, Iss 7, Pp 168-177 (2024)
The coal mine drilling shaft wall is a single-layer structure, and water leakage in the deep alluvium will seriously threaten mine safety. If there are construction defects in the stubble part of the well wall at the construction stage, it will lead
Externí odkaz:
https://doaj.org/article/2be6526f88a84a15a3d89d653ca6f667
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-22 (2024)
Abstract To elucidate the distribution law of the multiphase coupling slag discharge flow field in gas-lift reverse circulation during drilling shaft sinking, a numerical analysis model of gas–liquid–solid multiphase coupling slag discharge was e
Externí odkaz:
https://doaj.org/article/2d7c9f58afca4bcc85dca370c67fb762
Publikováno v:
Meitan xuebao, Vol 49, Iss 1, Pp 426-441 (2024)
Aiming at the problems of gas lift reverse circulation shaft washing slag discharge and low drilling efficiency in the application of vertical shaft drilling method in the Jurassic strata coal mines in western China, taking ϕ4.2 m advanced drilling
Externí odkaz:
https://doaj.org/article/d8379432ea5947a2b0e1fce8c33f395a
Publikováno v:
Case Studies in Construction Materials, Vol 18, Iss , Pp e02013- (2023)
The ever-increasing generation of aggregates in the construction industry has caused a serious burden on the environmental protection of mountains and ecosystems. The shortage of natural coarse aggregate provides an impetus for the utilization of agr
Externí odkaz:
https://doaj.org/article/2e2217f3ecee44c09a8203ee80ab03e5
Publikováno v:
Applied Sciences, Vol 13, Iss 18, p 10344 (2023)
This article begins with the engineering geological conditions and freezing design scheme of the Gongbei Tunnel’s underground excavation section, then applies the mathematical model theory of the horizontal freezing-tunnel-formation freezing temper
Externí odkaz:
https://doaj.org/article/ea1c7cc1bdc3403d845c599f015eeeea
Publikováno v:
Applied Sciences, Vol 13, Iss 15, p 8874 (2023)
This study investigated the distribution and evolution characteristics of the temperature field during the freezing and excavation of inclined shafts, with the freezing open-excavation section of Shengfu Mine’s main inclined shaft (located in Shaan
Externí odkaz:
https://doaj.org/article/62e3cd5402e74d2588d2147479e3d627
Publikováno v:
Geofluids, Vol 2022 (2022)
Grouting in deep, loose layers are a complex process in which many modes such as infiltration, splitting, and compaction coexist. It is of great significance to establish a realistic, simplified physical model to study the law of slurry diffusion. He
Externí odkaz:
https://doaj.org/article/52b6e222315c4292b753ce480d6628fe