Blar i Institutt for geovitenskap og petroleum på tidsskrift "Journal of Rock Mechanics and Geotechnical Engineering"
Viser treff 1-12 av 12
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A review on the performance of conventional and energy-absorbing rockbolts
(Journal article; Peer reviewed, 2014)This is a review paper on the performances of both conventional and energy-absorbing rockbolts manifested in laboratory tests. Characteristic parameters such as ultimate load, displacement and energy absorption are reported, ... -
Analysis of unlined pressure shafts and tunnels of selected Norwegian hydropower projects
(Journal article; Peer reviewed, 2018)Norwegian hydropower industry has more than 100 years of experiences in constructing more than 4000 km-long unlined pressure shafts and tunnels with maximum static head of 1047 m (equivalent to almost 10.5 MPa) reached at ... -
Discussions on rockburst and dynamic ground support in deep mines
(Peer reviewed; Journal article, 2019)The paper is a summary of discussions on four topics in rockburst and dynamic ground support. Topic1 is the mechanisms of rockburst. Rockburst events are classified into two categories in accordancewith the triggering ... -
Evaluation of earthquake impact on magnitude of the minimum principal stress along a shotcrete lined pressure tunnel in Nepal
(Journal article; Peer reviewed, 2019)In situ stress condition in rock mass is influenced by both tectonic activity and geological environment such as faulting and shearing in the rock mass. This influence is of significance in the Himalayan region, where the ... -
Experimental study and stress analysis of rock bolt anchorage performance
(Journal article; Peer reviewed, 2014)A new method was developed to apply pull-and-shear loads to the bolt specimen in order to evaluate the anchorage performance of the rebar bolt and the D-Bolt. In the tests, five displacing angles (0°, 20°, 40°, 60°, and ... -
Full-scale pullout tests of rock anchors in a limestone quarry focusing on bond failure at the anchor-grout and grout-rock interfaces
(Peer reviewed; Journal article, 2023)Rock anchors are a common safety measure for stabilising large-scale infrastructure, such as bridge towers, retaining walls, rock slopes and windmills. There are four principal failure modes for rock anchors: (a) tensile ... -
Geomechanical analysis of the influence of CO2 injection location on fault stability
(Peer reviewed; Journal article, 2016)Large amounts of carbon dioxide (CO2) should be injected in deep saline formations to mitigate climate change, implying geomechanical challenges that require further understanding. Pressure build-up induced by CO2 injection ... -
Norwegian oil and gas storage in rock caverns - Technology based on experience from hydropower development
(Peer reviewed; Journal article, 2021)Underground storage in rock caverns is widely used in Norway for many different petroleum products, such as crude oil, fuel, propane and butane. Basically, the caverns for such storages are unlined, i.e. containment is ... -
Performance of Identical Rockbolts Tested on Four Dynamic Testing Rigs Employing the Direct Impact Method
(Peer reviewed; Journal article, 2021)Impact drop tests are routinely used to examine the dynamic performance of rockbolts. Numerous impact tests have been carried out in the past decades on independently designed, constructed and operated testing rigs. Each ... -
Principles and methods of rock support for rockburst control
(Peer reviewed; Journal article, 2021)This paper presents the principles of rock support for rockburst control and three rockburst support systems used in deep metal mines. Before the principles of rock support are presented, rock fracture related to strain ... -
Principles of rockbolting design
(Journal article; Peer reviewed, 2017)This article introduces the principles of underground rockbolting design. The items discussed include underground loading conditions, natural pressure zone around an underground opening, design methodologies, selection of ... -
Roughness evaluation in shotcrete-lined water tunnels with invert concrete based on cases from Nepal
(Journal article; Peer reviewed, 2018)Most of the existing roughness estimation methods for water tunnels are related to either unlined or concrete/steel-lined tunnels. With the improvement in shotcrete technology, advancement in tunneling equipment and cost ...