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Keywords: rock bolt
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-071
... Abstract Rock bolt is one of the main supporting members in recent tunnel construction. There are two opinions for using the rock bolt in weak ground, which can be assumed to be continuum ground; rock bolt is effective for weak ground, and rock bolt is almost no effect for weak ground. To...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-134
... reinforcement systems work to ensure the stability of underground excavations. Rock bolts together with cables bolts have been commonly used as an effective underground support system and an element of reinforcement to improve excavation stability. The principle of rock bolting is one of the most researched...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-159
... Abstract To improve the effective use of rock bolt support system for practical and economic considerations in support system. A generic rock bolt design procedure usually starts with the identification of the rock mass strength, which is a process to minimize the deformation induced by the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-261
... University are presented: rock bolt modelling in collaboration with Kajima/Japan; rock grouting modelling and simulations under the joint NTU/SINTEF TIGHT project. Rock bolt models based on the discontinuous deformation analysis (DDA) are developed to study the interface behaviour, and laboratory tests...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-069
... shotcrete lining, steel ribs with sliding gaps and so-called energy absorbing rock bolts applied to mining sites where rock bursts and/or large deformation are likely to occur. In Japan, on the other hand, multiple-layered support has been applied to such geologically weak grounds. However, such strong...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-075
... conditions, the tunnel support materials may yield due to ground pressure and tunnel deformation. As a result, the tunnel may lose its stability due to reduced effectiveness of the tunnel supports. Rock bolt has been widely used as one of the essential tunnel supports, and many studied have been carried out...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-163
... Abstract Reserachers have been trying to find the economical ways to solve steel corrosion problem for long years. Although noncorrosive and high strength composite rock bolts have been produced since 80's, steel is still the most widely used rock bolt material due to its cheaper prices. In...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-164
... presents a specifically designed rock bolt, called Tension and Compression Coupled Yielding bolt, which can provide support for both squeezing and burst-prone rockmass encountered in mining and tunneling at depth. The new bolt mainly consists of a steel rod and two additional anchors. The steel rod is a...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-165
... Abstract Rock bolts are essential supports in NATM tunnels and underground mines. A conventional mechanical rock bolt is usually a passive support that is activated by rock mass movement, and then stress equilibrium is achieved passively. The expanding type of the new bolt, similar to swellex...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-338
... condition node rock system rockbolt element tensile force structural geology displacement rockbolt grouted rockbolt Upstream Oil & Gas asian rock mechanics symposium arms8 rock bolt shear force Unit shear force soft rock interface 8th Asian Rock Mechanics Symposium ARMS8 14-16 October...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-166
... ABSTRACT The main aim of the present research work is to investigate the effect of joint orientation on the strength and modulus enhancement of the jointed rock due to provision of rock bolts. Laboratory tests have been carried out on the jointed rock specimens (without and with rock bolts) of...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-161
... day time) becomes possible without using electricity. ground anchor devise optical fiber Akutagawa deformation sensor experiment application axial force measurement displacement rock bolt sun light cable plastic optical fiber axial force proceedings sensor deformation A new...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-168
... lattice girders should be replaced with slightly light support include three meters long rockbolts and ten centimeters of shotcrete cover. Upstream Oil & Gas rockbolt length shotcrete reservoir geomechanics rockbolt right tunnel excavation strength rock bolt NATM Reservoir...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-169
... systems. The temporary support system for section I consists of three bars lattice girders embedded in a 15 cm shotcrete layer and two wire mesh φ8 and for section II consists of 5 cm shotcrete layer with wire mesh φ8 and rock bolts. Also the permanent support system for sections I and II consists of 30...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-093
... ABSTRACT The stability of underground structure made especially in jointed rock mass is utmost important to designer, engineers and operators. Rock bolting is generally being practiced to reinforced excavation walls and roof by minimizing the movement of rock joints. In this study, a numerical...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-086
... study weak rocks are simulated the contact bond strength used is very less. tunnel alignment Reservoir Characterization shotcrete steel excavation rock condition thick shotcrete rock bolt construction lattice girder contractor head race tunnel adit tunnel support system...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-102
... Abstract: Numerical procedures of ‘enriched finite element method (or EFEM)’ are introduced in this paper for analyzing interaction between fully grouted bolts and rock mass. In EFEM, an element that is intersected by a rock bolt at any arbitrary direction is called ‘enriched’ element. Nodes...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-104
... are found to be good by implementing the rock support measures as systematic rock bolts, shotcrete and rock anchors. Some of the identified potential slide mechanisms are sensitive for joint water pressure and drainage holes are bored as part of the support measures. Behaviour of the surrounding rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-170
... the rock mass together with empirical charts for design criteria such as rock bolt spacing for ground control. During and following construction, validating model predictions is necessary to assess their performance. Parameter adjustment, or even the physics incorporated within the model, can be made...
Proceedings Papers

Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-084
... computer program was prepared for solving the problem on the basis of numerical methods. 1. Introduction In rock engineering, rockbolts have been used to stabilize openings for many years. The rock bolting system may improve the competence of disturbed rock masses by preventing joint movements, forcing...

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