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Keywords: rock bolt
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2318
... Abstract The mechanical behaviors of rock joints with and without rock bolt are essential for ensuring the safety of rock engineering and determining support scheme in jointed rock masses. This paper experimentally investigated the shear behavior of unbolted and bolted artificial rough joints...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0429
... ABSTRACT: Rock bolt is one of the major support systems of tunnel engineering. It is used to stabilize suspended rock blocks around an excavation section, reinforce rock mass, and reduce displacement along rock joints. This study proposed a rock bolt model, which includes two parts: a bolt...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1641
... ABSTRACT: New Concept Mining (NCM) has implemented the Dynamic Impact Tester (DIT) to conduct laboratory based dynamic testing on rock bolts. The DIT allows NCM to move rapidly through the R&D cycle for new rock bolts. This allows both a shorter time to market as well as comprehensive...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1364
.... By considering elastic and plastic states of rock bolt during shearing, the rotation of bolt extremity can be calculated analytically. Therefore, the loading angle is obtained from displacing angle. The verification between analytical results and laboratory results from reference research implies...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-246
...) mobile belt in the Central India Peninsular Shield. reservoir geomechanics subsidence parameter rock bolt Reservoir Characterization stope Rock mechanics Investigation metals & mining strength crown pillar ore body manganese ore wall rock structural geology Thickness schist sill...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1021
... measures, consisting of rock bolts and wire mesh. In response to the event, mapping and stability assessment was performed at several locations throughout the tunnel. Rock mapping, scanline surveys, and LiDAR data evaluation were used as the basis for rock mass classification, characterization of rock...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0368
... 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...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-1021
... ABSTRACT: Fully grouted rock bolts are considered the most economical support system for exposed unsupported rock in various mining operations. The paper presents parametric study of an underground metal mine with the horizontal cut-and-fill method of mining at the depth of 150 meters from...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-613
... Abstract: Three new methods for identifying axial forces in ground anchor or rock bolt are presented. Unlike in traditional methods that rely on the use of an electronic device, such as strain gauges or load cells, these new methods do not use electronic devices for reading data, but instead...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-720
... in underground excavation and the displacements at MPBX nodes were observed for previous numerical model calibration. Time dependent numerical models were designed to take into consideration the effect of jointing using discrete fracture network (DFN) and rock bolts in 3DEC. Sensitivity studies were performed...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-456
... be used for evaluating the underground space more efficiently and effectively using a crack density diagram to calculate the rock bolt direction that will best intersect with cracks. In this paper, the authors show the specific content of this system and analyze the results of the evaluation in detail...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-685
... Abstract The construction of some civil and mining structures requires the installation of rock bolt to strengthen, consolidate and stabilize the rock-rock, rock-concrete or concrete-concrete interfaces. In this paper, an experimental study was put on to validate non-destructive methods...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-007
... Abstract Computer modeling can be used to explore and gain new insights into the impacts of rock bolt intersecting joints in rock masses, and to estimate the effectiveness of the rock reinforcement system. In order to achieve this goal, numerical simulation was performed using FLAC3D...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-6952
... Abstract The shear loading performance of fully grouted rock bolts is presented. A new experimental method, two types of rock bolts (D-Bolt and rebar), joint gap opening effect, and three types of host rock material were conducted. The bolts have similar loading capacity whilst the loading...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7089
... Abstract A rock bolt represents the most important element in ensuring stability of rock mass excavations. This paper presents weaknesses and strengths of methods which deal with evaluation of rock bolts. Most widely used is pull-out test, conducted for capacity determination in destructive...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7418
... of the cavern rock mass to variations in a set of critical input parameters. The results of the sensitivity analysis were also used to identify an appropriate minimum operating pressure (mOP) criterion. strength bara storage cavern situ stress natural gas storage cavern rock bolt long-term...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-524
... convergence clay layer rock bolt plane drift area boundary condition excavation convergence rate ARMA 12-524 ~Rrn~ ammc;m tad ri1Mhanici. MYKmbc:n Numerical analysis of room closure rate in an underground potash mine Rahnama, A. Graduate tudent, Department ofMineral Engineering, New Mexico In titute...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-497
... ABSTRACT: Understanding the interaction between rock bolts and underground rock movement is critical for safe and cost effective underground excavation design. Although early research on this subject involved a balance of theoretical analysis and field measurement, recent work has been heavily...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-675
... are transferred to key blocks in the earlier batches batch by batch until the first batch according to a force transfer algorithm. The resultant forces of the key blocks in the first batch are finally utilized for support design. After selection of a rock bolting scheme, the stability of the reinforced rock mass...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-158
... ABSTRACT: In this paper, the impact dynamics of rock bolts with passive friction control is modeled and analyzed. Numerical investigations are performed for the rock bolts with a frictional energy absorber, exemplified by the Roofex bolt of Atlas Copco, under various dynamic loadings...

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