...Dynamic Inflating Characteristics of Steel Tube Rockbolts Combined with Blasting Ignition System Gyeongjo Mina, Yunyoung Jeongb, Sewook Oha, Sewoong Parka, Bohyun Kimc, Junggyu Kimd, Hyungsik Yangd and Sangho Choa* a Chonbuk National University, South Korea b Sambo Engineering, South Korea c...

...Laboratory Methods for Investigation on Stress Corrosion Cracking of Rockbolts and Cable Bolts Serkan Saydama*, Saisai Wua, Hamed Lamei Ramandia, Alan Croskya, Wendy Timmsb, Paul Hagana, Bruce Hebblewhitea, Damon Vandermaata, Peter Craiga,c, Honghao Chena and Elias Eliasa a University of New South...

...Some Design Principles for Rockbolting in Underground Excavation Charlie C. Li Norwegian University of Science & Technology (NTNU), Norway [email protected] Abstract This paper focuses on some key design principles for rockbolting in underground rock excavation. The items discussed include...

... Abstract Computer modeling can be used to explore insights into the effect of rockbolt intersecting joints in rock masses and to estimate the effectiveness of the rock reinforcement system. In this paper, the fully grouted rockbolts are modeled within the frame work of the two-dimensional...

... out assuming a ground deformation mode which simulated horizontal compressive deformation of surrounding ground caused by earthquakes, using a 1/20 scale model. The tunnel lining was laid in a soil container with countermeasures such as rockbolts, carbon fiber sheet on the inner surface of the lining...

... was analyzed numerically while varying lengths and fixing conditions based on the test results obtained from various researches. The supportability of the cablebolts was assessed by comparing displacements, hoop stress taken place in shotcrete and axial bolt forces with those when rockbolts were installed...

... Upstream Oil & Gas rockbolt length shotcrete reservoir geomechanics rockbolt right tunnel excavation strength rock bolt NATM Reservoir Characterization RocSupport plastic zone tunnel displacement traditional support system maximum displacement rock mass safety tehran...

... stress, the maximum shear stress of shotcrete and the maximum axial force of rockbolt are also insignificant. Therefore, it is estimated that the stability of the spillway tunnel ensured. Keywords: Emergency spillway; Excavation; Tunnel; Numerical analysis. 1. Introduction It is frequently flooded due...

... ABSTRACT Rock-support interaction concepts, which are applied to support systems such as concrete linings and ungrouted rockbolts, cannot be applied to grouted rockbolts, because of the nature of the structural interaction of the rock mass and grouted rockbolts. In this paper, by assuming...

... of steel pipe umbrella and rockbolts arc deeply investigated in detail. I. INTRODUCTION ConStruction is the 1110st important phase for the stability of ~urrounding rock of tunnel. Therefore. researchers are interested rn the influences of different approaches of tunnel construction On the stability...