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Keywords: shotcrete
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-007
... was built using the NATM method with thin permanent shotcrete initial and final liners separated by a sprayed on waterproofing membrane. The project also includes the rehabilitation and enlargement of the 100-year-old double track Mont Royal Tunnel which is about 5 km long. The REM also consists of 3.6 km...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-022
... by Rockplan also included investigating the effects of a change in the rock mass quality and reduced horizontal stress magnitude. geologist reservoir characterization scenario shotcrete europe government displacement magnitude geology geological subdiscipline escalator shaft foundation layout...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-025
... china government mechanism construction highway tunnel reservoir characterization university collapse mechanism journal in-situ monitoring geological subdiscipline steel shotcrete numerical simulation chengdu university liangwangshan tunnel arch 15th ISRM Congress 2023 & 72nd...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-051
... to overloading of the supporting inner lining rather than the rock itself). geology lining excavation relaxation deformation europe government overburden compressive strength invert degradation shotcrete ground transportation tunnel prediction figure 5 convergence geologist gsi figure 4...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-067
.... reservoir simulation strategic planning and management geology europe government sweden government artificial intelligence geologist estimation deviation tunnel skewness technology geotechnical characteristic rock mechanic construction shotcrete assessment kth royal institute emphasis...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-253
... rigid supports, leading to brittle failure. Accordingly, the authors have been developing new deformation-controlled supports that can reduce stress acting on steel supports, shotcrete, and rock bolts by gradually resisting high ground pressure while controlling tunnel deformation. Here, we report...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-258
... ABSTRACT: Shotcrete is a widely used rock reinforcement method that significantly impacts the carbon footprint of underground construction and mining. The sustainability of shotcrete can be improved by, e.g., replacing a portion of cement in the mix with low-carbon materials or minimizing...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-263
... ABSTRACT: The bond strength at the aggregate-cement paste interface is affected by the microstructure of the interfacial transition zone (ITZ). However, the influence of substrate crystal structure on the rock-shotcrete interface behaviour has received limited attention. This study...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-341
... ABSTRACT: At sequenced tunnel drives, next to the rock mass conditions, the advance rates of the single excavation stages and the moment of ring closure determine the performance of shotcrete linings. Especially in heterogeneous rock masses, the investigation of the optimum ring closure moment...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-254
... steel mesh q-system norwegian geotechnical institute shotcrete geobrugg ag diameter 3 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Rational design for tunnel ground support with membranes based on the geomechanically classification of Q by Barton...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-074
... Abstract The use of unlined/shotcrete lined pressure tunnels and shafts are very cost effective solutions for the hydropower project and therefore are being implemented worldwide. However, the ground conditions at the area of concern should be favorable regarding both minimum principal stress...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-030
... and decreases the effect of interrelation between the blocks. This type of structures presents complex stability conditions for carrying out excavations. tunnel shotcrete discontinuity figure 5 construction gallery reservoir characterization aqueduct tunnel stability figure 2 upstream oil...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-035
... to the stopes. This damage can impact the development rate as rehabilitation needs to be executed to guarantee the staff's safety. In the deepest areas, part of level 18 and level 19, the shotcrete is used in operational cycle of the ramps development: infracycle and incycle. It means that the shotcrete occurs...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-089
... Abstract Fiber reinforced shotcrete has been used as primary surface rock support, providing the necessary post-crack performance and strain capacity. Both polypropylene and steel fibers have been added on the mix composition in order to achieve the necessary deformation capacity of the fiber...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-258
... Abstract The shotcrete at Cuiabá mine consists of a mixture of cement, aggregates, water, fibers and admixtures. The fibers are crucial to this support since they act in the post-cracking stage, maintaining its integrity and some load-carrying capability. Actually, the Cuiabá mine is subject...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-255
... Abstract In this paper, formulas are proposed for rational and realistic sizing of barricades made of development waste rock as cemented paste backfill retaining structures in underground mining operations. The formulas, which take into account the application or not of shotcrete, allows...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-254
... metals & mining shotcrete formula upstream oil & gas barricade reservoir characterization strength shotcrete application stope equation stability application paste backfill compressive strength reservoir geomechanics wrb gneiss shear strength calculation brazil...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-304
... of the model considering its benefits for the modelling of HSSR material. structural geology calibration axial deformation application figure 8 compression kpa figure shotcrete simulation numerical simulation residual strength result stress-strain relation reservoir characterization...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-156
... amplification fracture instrumented d-bolt mpbx upstream oil & gas geophone shotcrete rock mechanic intersection lkab metals & mining displacement deformation frequency anchor symposium reservoir characterization excavation sensor borehole displacement sensor...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-278
... law with softening behaviour and an oriented criterion integrated in the continuum model. As a result, a flexible support is advised, based on a high density bolt system and a thin lay of shotcrete. This methodology has been developed in the case of Gilboa in Israel, except the schistosity which has...

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