The items discussed include underground loading conditions, natural pressure zone around an underground opening, design methodologies, selection of rockbolt types, determination of bolt length and ...
The amount of reinforcing steel in rectangular beams was determined by RandomTree and the GP_4 group, with an accuracy of 88.98%, this model is presented in Figure 5, where it is observed that the data pattern is based on the effective camber (d), which separates the predictions when d<55 obtaining more steel area and when d>55 …
Twisted or deformed steel bars are commonly used in construction work for reinforced concrete structures such as buildings, bridges, and other infrastructure. These bars have …
1 INTRODUCTION. In the past few years, several advanced research methods, such as intelligent mining, unmanned mining (G. Wang et al., 2022), remote mining, and even machine learning (Duan et al., 2021) have been widely adopted in research on mining engineering.This demonstrates that the knowledge advancement …
To construct corrosion resistant protective underground arches in waterfront structural engineering, steel bars are replaced by basalt fiber reinforced polymer …
Several devices are used to provide support in an underground space. Wooden prop is generally employed for the purpose of passive secondary or short-term support of the mine roadway roof and sides. The wooden prop has various known usage limitation, including low strength, deterioration of wood in humid environment, poor …
AbstractAn appropriate hybrid form of steel and fiber-reinforced polymer (FRP) bars in reinforced concrete members can prevent steel corrosion and ensure capacity and ductility. ... the comparable degree of damage among beams with four different bar configurations indicates the equivalent impact resistance of the beams. ... Key …
in Underground Mine Engineering Xiang Li 1, Weipei Xue 1,2, *, Cao Fu 1, Zhishu Yao 1, * and Xiaohu Liu 1 1 School of Civil Engineering and Architecture, Anhui University of Science and Technology,
In recent years, the mining industry in South Africa has become a major user of fibre-reinforced shotcrete for underground support. In line with this trend, CHRYSO Southern Africa reports growing ...
Steel reinforcement are steel bars that are provided in combination with plain cement concrete to make it reinforced concrete. Hence these structures form steel reinforced …
The Mechanical Performance of Solid Reinforcing Bar Rockbolts . × Close ... this increase directly correlates to an increase in underground mining activity. There are different mining methods for different minerals, and each have their risks. ... of failure Red Blue Orange Yellow 1534 1534 1755 975 0.156 0.156 0.179 0.10 7.12 7.09 7.98 3.93 ...
equivalent cross-sectional area of the SFCB; ... Y.-L., J.-G. Dai, and J. G. Teng. 2017b. "Buckling of steel reinforcing bars in FRP-confined RC columns: An experimental study." ... Jian Zhang, Yang Wei, Gang Wu, Flexural behavior of concrete beams reinforced by partially unbonded steel-FRP composite bars, Engineering Structures, 10.1016/j ...
T he 1 st International Symposium on Fiber Reinforced Shotcrete for Underground Mining (InFUM) was held from October 1 st to 4 th at PUC-Rio. The meeting included lectures and a visit to the Structures and Materials Laboratory with leading experts from the international community to discuss and present advancements and innovations in the use of fiber …
1. Introduction. A new reinforcement, termed steel-FRP composite bar (SFCB), has been introduced in concrete structures to combine the benefits of steel and fiber-reinforced polymer (FRP) bars, which is produced through warping FRP fiber around a steel core [1], [2].The external wrapping of the FRP layer endows the SFCB with exceptional corrosion …
In this paper, the time-varying characteristics of the durability and lateral bearing behaviour of fibre reinforced polymer (FRP) bar-reinforced concrete piles in marine environments are studied.
Rock support generally combines the effects of reinforcement, by such elements as dowels, tensioned rock bolts and cables, and support, with shotcrete, mesh and steel sets which …
@article{Han2022SimplifiedIO, title={Simplified implementation of equivalent and ductile performance for steel-FRP composite bars reinforced seawater sea-sand concrete beams: equal-stiffness design method}, author={Shiwen Han and Chao-Chin Fan and Ao Zhou and Jin-ping Ou}, journal={Engineering Structures}, year={2022}, url={https://api ...
Newcastle, Australia - DSI Underground Australia is pleased to announce today the completion of the Fero Group (Fero) acquisition.DSI Underground Australia manufactures and supplies high quality Australian-made strata reinforcement and ground support products essential to safety and efficiency in the underground mining, infrastructure and …
Many rebar alternatives, such as natural fiber reinforced concrete (NFRC) and polymer concrete, offer sustainable and eco-friendly solutions, reducing the environmental impact of construction activities.
This research was financially supported by the National Key R&D Program of China under Grant No. 2019YFE0119800; the National Natural Science Foundation of China under Grant Nos. 51778024 and 51778019; the Beijing Natural Science Foundation under Grant No. 8202002; and the Key Laboratory of Transport Industry of Bridge …
In order to economically and reasonably solve the problem of mineshaft support in complex geological conditions, the mechanical properties of high-performance …
Based on the above information, this paper takes a sidewall of an underground engineering in Nanjing Jiangbei New District (As shown in Fig. 3) as research object and studies the effects of external ambient temperature, FT, and DT on the temperature change, temperature distribution, volumetric strain and temperature stress …
Newcastle, Australia - DSI Underground Australia is pleased to announce today the completion of the Fero Group (Fero) acquisition.DSI Underground Australia manufactures and supplies high quality …
TUF-STRAND SF "structural fibers" are a patented polypropylene / polyethylene synthetic macro-fiber successfully used to replace steel fibers, welded wire mesh and conventional reinforcing bars in a wide variety of applications. TUF-STRAND SF fibers comply with ASTM C1116, Standard Specification for Fiber Reinforced Concrete and Shotcrete, and …
This article presents advantages in the application of precast/prestressed concrete in structural frames. Using pretensioned concrete components in conjunction with a composite cast-in-place ...
The main problem encountered in steel reinforced concrete structures is the corrosion of the steel bars which eventually results in the failure and disintegration of the structure. Fiber-reinforced polymer (FRP) rebar has been considered as an alternative for this since corrosion is a material problem.
However, with the increase in the density of urban building clusters and the continuous development of underground spaces, complex engineering conditions are inevitably encountered during urban tunnel construction, such as underground pile groups, deep foundation pit supporting structures, and reinforced concrete (RC) (Li et al., …
Two types of failure modes were observed (1) pure pull-out failure of steel bars from the mortar and (2) tensile splitting of mortar, depending on the employed mortar types and steel diameters. The bond stress between the steel bars and cement mortars varied between 1.4 MPa and 7.9 MPa for the tested samples.
Two inner ring steel bars and two outer ring steel bars wit h diameters of 10 mm were arranged in each model specimen. In the inner and outer ring s, 178 vertic al steel bars with diameters of 10 mm
In Underground Mining, we offer the following Services to you: ... We are offering you a wide variety of rock bolts consisting of steel bars, strand and hollow bars as well as GRP glass fiber reinforced systems. Consequently, we can always provide you with the optimum solution for the individual requirements of your mine.
