Results 21 to 30 of about 1,131 (181)
INVESTIGATING THE FEASIBILITY OF USING RECYCLED FIBRES INSTEAD OF INDUSTRIAL FIBRES IN SHOTCRETE
Rudarsko-geološko-naftni ZbornikShotcrete is one of the standard systems used in the tunnelling industry, including cement, sand, water, and additives. Adding fibres to shotcrete is a method to enhance its mechanical properties.
Shahla Miri Darmarani +3 more
doaj +1 more source
Applied Sciences, 2022 Wet-mix shotcrete has been widely used to support roadways during the excavation of underground mining. In practice, the mix proportion of wet-mix shotcrete plays a key role in later successful application.
Bin Han +4 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza +4 more
wiley +1 more source
Implementation of a new time-dependent shotcrete constitutive model for 3D tunnel modeling
Results in EngineeringShotcrete behaviors, including modulus and compressive strength, are highly time-dependent. Moreover, freshly applied shotcrete is subjected to loading immediately after application, making its realistic representation both essential and challenging in ...
Sinodos S. Sefene +2 more
doaj +1 more source
Analysis of Support Reaction Curves considering Time-Varying Effect of Shotcrete
Advances in Civil Engineering, 2020 The core content of the convergence constraint method is to determine the reasonable support time and support stiffness. The stiffness of shotcrete in supporting structure is dynamic.
Ya-Qiong Wang, Ming-Rui Luo
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley +1 more source
Numerical Simulations of Restrained Shrinkage Cracking in Glass Fibre Reinforced Shotcrete Slabs
Advances in Civil Engineering, 2017 Modern tunnels in hard rock are usually constructed by drill and blast with the rock reinforced by shotcrete (sprayed concrete) in combination with rock bolts.
Andreas Sjölander, Anders Ansell
doaj +1 more source
Bending Properties of Short-Cut Basalt Fiber Shotcrete in Deep Soft Rock Roadway
Advances in Civil Engineering, 2020 To study the effect of short-cut basalt fiber (BF) on the bending and toughening properties of shotcrete, bending toughness tests of short-cut BF shotcrete slabs with different volume fractions were carried out.
Shaoyang Yan +4 more
doaj +1 more source
Case Studies in Construction Materials, 2021 Coal gangue is one of the largest discharged industrial solid wastes, which is generated in the processes of coal mining and washing. To accelerate the in-situ utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single ...
Peiyuan Chen +5 more
doaj +1 more source
Seismic analysis and design of tunnels within fault ground: A review
Deep Underground Science and Engineering, EarlyView.The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang +6 more
wiley +1 more source