Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Zhengzheng XIE"'
Publikováno v:
Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Vol 10, Iss 1, Pp 1-20 (2024)
Abstract High-strength bolts have become indispensable support materials in geotechnical engineering, but the incidence of safety accidents caused by bolt fractures under complex geological conditions is increasing. To address this challenge, this st
Externí odkaz:
https://doaj.org/article/fe683ee312604e6fbfe84b8d86bac554
Publikováno v:
Meitan xuebao, Vol 49, Iss 1, Pp 309-319 (2024)
High-frequency, low-energy impacts consistently inflict damage on the surrounding rock and anchoring structure in deep roadways, leading to ongoing instability. The construction of anchoring support system that can withstand these dynamic impact load
Externí odkaz:
https://doaj.org/article/a67e0f789c5d4478a968842fa6f99d14
Publikováno v:
Case Studies in Construction Materials, Vol 20, Iss , Pp e03166- (2024)
The combination of nanocolloidal silica and aluminate cement is a potential technical approach to solve the problem of mudstone grouting, but there is a lack of high-performance admixtures to improve early strength and gel time. The effects of three
Externí odkaz:
https://doaj.org/article/38f839c49b55442ca3f472f296369039
Publikováno v:
SN Applied Sciences, Vol 5, Iss 11, Pp 1-16 (2023)
Abstract With the development of deep mining of coal resources, the problem of deep roadway management is becoming increasingly prominent. This study aims to analyze the deformation and failure mechanism of deep-buried soft rock roadway under the inf
Externí odkaz:
https://doaj.org/article/bf1b5d2437bb49b2bdbe3174c0816a90
Publikováno v:
Journal of Materials Research and Technology, Vol 26, Iss , Pp 3726-3743 (2023)
Micro-pore grouting consolidation constitutes a pivotal technical solution for addressing the issue of water-related weakening in mudstone. Given the engineering challenges such as the sub-optimal injectability of cement slurry materials into mudston
Externí odkaz:
https://doaj.org/article/26de0d83fabb46ee8ff3a6d9e64cdf64
Autor:
Qingli Meng, Lulu Sun, Yingjie Ma, Yuanyuan Wei, Xiaowei Ma, Lu Yang, Zhengzheng Xie, Fang Li, Zhe Wang, Xiaomei Tao, Xia Zhen, Rui Jin, Hongyan Gu
Publikováno v:
BMC Health Services Research, Vol 23, Iss 1, Pp 1-9 (2023)
Abstract Backgroud With the reform of medical system in China, Beijing municipal hospitals explored a new pharmaceutical care model and set up medication therapy management services (MTMs) in ambulatory care since 2019. We were one of the first hospi
Externí odkaz:
https://doaj.org/article/772e76c0ff7c4698814214f9290a02d4
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-22 (2023)
Abstract Since the western region of China, which is typical of extraordinary resource endowments, has gradually emerged as the major mining zone in China, the mining of thick coal seams and roadways with coal-rock composite roof have become more and
Externí odkaz:
https://doaj.org/article/ae9091af3f564ff0ac33b1ffac356e02
Publikováno v:
International Journal of Mining Science and Technology, Vol 32, Iss 6, Pp 1219-1231 (2022)
This paper proposes a digital image processing-based detection algorithm for cross joint traces of coal roadway heading face. Initially, the acquired images were preprocessed, i.e., adaptive correction was conducted for non-uniform illumination image
Externí odkaz:
https://doaj.org/article/bed58fe2fe25404cb414420e38aa2513
Publikováno v:
International Journal of Mining Science and Technology, Vol 32, Iss 5, Pp 1009-1019 (2022)
It’s a universal engineering problem to seal micro-cracks of low-permeability argillaceous rock mass by grouting in the fields of civil engineering and mining. This paper achieved the grouting sealing of low- permeability artificial rocks with the
Externí odkaz:
https://doaj.org/article/3bdf32e319be4faaa62e0b3cef1585fd
Publikováno v:
SN Applied Sciences, Vol 5, Iss 11, Pp 1-1 (2023)
Externí odkaz:
https://doaj.org/article/6673a1afa58a4bbfb82e6ed8a1cabae7