... ABSTRACT Shotcrete is a support system that is sprayed onto the surface of excavated tunnels and mines to create a self-supporting layer. It is an economic and integral solution to ground support in civil and mining construction projects. To ensure the long-term stability and safety...

... ABSTRACT: This paper aims to provide insights into the effectiveness and failure mechanism of shotcrete lining in mine developments. For this purpose, a two-dimensional numerical program based on the Finite-Discrete Element Method (FDEM) was utilized to simulate an instrumented section of a 10...

... head outside consolidation grouting ring, shotcrete and secondary lining is about 490m, 260m and 255m, respectively. Considering the pressure reduction of drainage holes, the average external water pressure head of secondary lining is 170m. Without drainage holes, the underground water level around...

... been achieved using numerical analyses to compare Updated design span curves (Ouchi et al., 2009) support capacity requirements for changes in drift profile, different bolting considerations, influence of shotcrete, The Weak-RMR system of classification influence of support in the floor...

... the carbon footprint and conserving natural aggregates. This research aims to understand the applicability of crushed waste glass in shotcrete production. Several mix designs with up to 50% of sand replacement were prepared and tested according to standard recommendations. Mechanical strength and fracture...

... is unavoidable, spiling and shotcrete arches are used to manage the increased squeezing rate. This paper reflects techniques that have been used to enhance safety in our travel ways by effectively monitoring and managing squeezing ground at Turquoise Ridge. metals & mining ramp rehab convergence...

... shotcrete data mining extensometer CPF primary stope overcut backfill sill pillar footwall contact CRF secondary stope 1. INTRODUCTION The Kittilä Mine, owned and operated by Agnico Eagle Finland, is a gold mine located in Finland, 150 km north of the Arctic Circle at 66 latitude. The mining...

... technique using reinforced ribs of shotcrete (RRS). This technique has replaced expensive steel sets and cast concrete arches in tunnels in Norway. The shape of RRS and its support capacity is similar to sprayed lattice girders. However, RRS is more flexible in application because it is not prefabricated...

... structure, wedge modeling, and subsequent stabilization design. Improvements consisting of rock bolts and shotcrete for portions of the tunnel are currently under design. Software facilitated the use of LiDAR data to efficiently assess rock structure throughout the tunnel and supplement field measurements...

... performance of four different rigid and flexible support systems. These systems were (i) lattice girder with shotcrete, (ii) lattice girder with shotcrete and additional steel ribs, (iii) steel fibre reinforced shotcrete (SFRS) and (iv) multi-layers of steel arches. Our analysis shows that despite...

...1. INTRODUCTION Underground metal mines typically use a combination of rockbolts, wire-mesh and shotcrete or fibercrete (usually 5 to 15 lb/yd3 of macro-synthetic fibers) to support excavations. These products and their installation sequencing are determined by both geotechnical and operational...

... Upstream Oil & Gas knowledge management US government metals & mining Pakalnis correlation proceedings strength support design shotcrete excavation Nevada RMR mesh classification database calculation rock mass Engineer guideline design curve Ground Support Surface Support...

... on the TSL is known, the effective permanent support time of the TSL can be estimated by the proposed relationship. 1. INTRODUCTION metals & mining liner application creep rupture envelope dead weight shotcrete design engineer Upstream Oil & Gas specimen TSL rupture envelope thin...

... Characterization drain hole shotcrete structural geology rock bolt weakness zone SBLW Pakistan strength rock support redesign rock slide divide pier contractor construction Upstream Oil & Gas discontinuity neelum jhelum hydroelectric project excavation reconstruction Engineering Team 1...

... ABSTRACT: Providing efficient support system which prevents failures and deformations is one of the most important issues during tunnel construction especially in weak grounds. When conventional support systems such as rock bolts, shotcrete, wire mesh, steel frames and lattice girders cannot...

... permanent rock anchors, shotcrete and rock mesh. Construction included extensive work performed on ropes, including vegetation grubbing, rock scaling, drilling for and installing double corrosion rock anchors, the grouting, tensioning and testing of rock anchors, shotcrete placement and high tensile...

... Engineer recommendation Nevada support recommendation shotcrete ground support recommendation design recommendation support pressure 1. INTRODUCTION Ground conditions at underground gold mines in Nevada range from good to extremely poor and implementing the most appropriate ground support can...

... surface support systems [5, 6, 8, 12, 13, 15, 17] metals & mining strength liner thin spray-on liner performance criterion liner 3 Wellbore Design criterion tensile toughness Reservoir Characterization toughness value tensile modulus shotcrete TSL support system ultimate...

... such as regions truncated by faults. metals & mining stope reservoir geomechanics Reservoir Characterization Upstream Oil & Gas central stope stability analysis greenfield platinum project machine learning Artificial Intelligence preliminary support design support design shotcrete...

.... This important aspect provided us the ability to monitor ground movement very early on and track progression of rockmass deformation and changes as the cave matured drawbell strike drive excavation shotcrete picrite unit cave footprint support system operation footprint new afton orientation...