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Keywords: excavation
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Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-011
... stresses after excavations. The main interest of the simulations was the determination of deformations and peak/relief stresses during excavations and the stabilizing effect of vertical pillars to the mine. Four vertical pillars were included into the model. Stability and sizes of the pillars were not...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-014
... Norwegian University of Science and Technology Norway ABSTRACT In situ rock stresses are directly associated with the stability of underground openings and thus the state of in situ rock stress is a crucial factor for the design of underground excavations. The consequences of the rock stresses are rock...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-061
... Abstract At Outokumpu Chrome Oy Kemi chromite Mine, Finland rock mechanical problems caused by rock stress occur in unfavorable geotechnical conditions. Maximum rock movements are about 10 to 20 cm. This has led the need to repair the rock support and re-excavation. A research program...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-022
... Abstract The construction of the Romaine-3 surface powerhouse requires an important excavation of approximately 98 m (left to right bank direction) by 64 m (upstream-downstream direction) and 80 m deep in the rock mass. The water intake tunnel as a length of approximately 1.8 km including the...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-038
... brittle fault zones intersect the planned station. These pose interesting challenges in the project that were dealt with rock mechanical analysis including the study of the effect of the stress state and excavation sequencing. The analysis were used to guide, and advise the engineering design and layout...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-060
... Abstract Excavation of long deep tunnels through adverse ground conditions by shielded TBMs requires thorough rock stability analyses to evaluate the possibility of entrapment of the machine. This refers to the assessment of ground pressure and displacement in tunnel walls. For this purpose...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-055
... Abstract A method to back calculate stress state change was developed in Dynamic Control of Underground Mining Operations (DynaMine) research project. The purpose of this method is to provide real-time estimates of the stress state change caused by excavation. In this paper the method is...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-025
... Abstract Rantatunneli is a project of moving highway 12 into a tunnel in the city of Tampere. The excavation work was finished in the summer 2015. The tunnel will be operational in 2017. The twin tunnel will be the longest highway tunnel in Finland with the length of 2.3 kilometres. The...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-143
... notice that an optimistic assessment of in-situ stresses may result into costly design surprises during the excavation stage. Consideration of incoherency in the computed in-situ stress magnitudes and orientation resulted into lowering of the caverns level farther 5 m from the surface than the design...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-059
... rockburst prediction slenderness bologna university structural geology rockburst strength value loading University Rock mechanics specimen excavation Carrara marble Italy exploitation Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-024
... ABSTRACT: The Skaland mine is a graphite mine in Senja island, North of Norway. The mine is located in a granite rock (possibly be Migmatite). The owner of the mine – Leonard Nilsen and Sons (LNS) – plans for a new excavation profile, and the stability of the excavation needs to be checked for...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-004
... rock stress may bring forth additional difficulties in rock support design. It is crucial to take into account the in-situ rock stress in designing of the shape and orientation of underground works and selecting of excavation methods and rock support. With a number of examples of real projects the...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-104
...Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 Second fine inversion of regional in-situ stress field considering the excavation disturbance effects of pilot tunnel G.Q. Chen State Key Laboratory of Geohazard Prevention and Geoenvironment...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-055
... phenomena disclosed during the excavation of the auxiliary tunnels and the underground testing sites. Based on these data, the multi-methods integration analysis is carried out to estimating the regime, orientation and magnitude of the in-situ stress at this site. The analysis indicates that the accuracy of...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-111
..., Hast (N. Hast) first carried out the work of earth stress measurements in the Scandinavian Peninsula. Reservoir Characterization lithosphere back-analysis method application structural geology displacement earthquake prediction excavation stress measurement Upstream Oil & Gas...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-051
...Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 Features of in situ stress in a crystallized batholith and its influence on the rockbursts of tunnels J.Q. Ma College of Highway, Chang an University, Xi an, China ABSTRACT: During the excavations...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-001
... ABSTRACT: The variability of in situ rock stress is discussed in relation to different scales: the tectonic/regional scale, site scale, excavation scale, borehole/measurement scale, and microscopic scale. The factors causing the stress variability are rock inhomogeneity, rock anisotropy...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-081
... stress evaluation by means of the overcoring method related to an white marble alpine underground quarry is reported in this paper. The stress measurements were made on the walls of two new underground rooms, excavated to increase quarry exploitation, and they involved a comparison of the values obtained...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-091
... excavated radius, the stress level, and the nonuniform stress field of the tunnel with UDEC technique. The growth curves of the energy dissipation quantity and the energy dissipation ratio were concave with stress level increasing and the non-uniform stress field aggravating. The growth curve of the energy...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-096
... ABSTRACT: Excavation induced stress change is a significant and considerable factor to drive the brittle failure in the underground opening. Rockburst, as a type of brittle failure, has became a great threat to the construction of mining, traffic tunnels, hydropower station etc. With Hoek...

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