Search
Search Results
-
Strength characteristics of rock anchored by NPR bolt with different preloads
This study compares the strength characteristics of rocks anchored by NPR bolts and ordinary bolts with varied preloads, based on the mechanical...
-
Geomechanics model test and numerical simulation of 2G-NPR bolt support effect in an active fault tunnel
Active faults are a common adverse geological phenomenon that can occur during tunnel excavation and has a very negative impact on the construction...
-
Research on the Energy Constitutive Model and Static Load Anchorage Characteristics of a Novel Mace-Type Energy Release Bolt
Based on the shortcomings of traditional bolts in the process of supporting surrounding rock, the structural composition and working principle of new...
-
Study on the impact resistance of prefabricated fractured red sandstone samples with different dip angles reinforced by bolt-grouting
With the development of underground engineering, dynamic disasters, such as rock bursts, are becoming increasingly serious. Bolt-grouting combined...
-
An Ultrasonic Rock Bolt Sensing Technology (I): Methodology and Laboratory Studies
Rock bolts play a critical role in ground support in mining, tunneling and construction. Being able to obtain timely information on rock bolt load...
-
Numerical Modeling of Rock Bolt Support in Case of Rheological Behavior of Rock Mass in Deformation
AbstractThe article presents a geomechanical model of a tunnel with rock bolt support. The numerical modeling is performed in ANSYS. The effect of...
-
Bolt Profile Geometry Effect on Load-Bearing Characteristics of Fully Grouted Rock Bolts
AbstractA series of laboratory pull-out tests were performed on several types of bolts to investigate the effect of profile geometry of resin grouted...
-
Large-scale field test on deformation mechanism and stability enhancement of soil slope reinforced by the micro-NPR bolt
Bolts play a critical role in landslide disaster prevention and control as an effective slope reinforcement method. Generally, the Poisson's ratio...
-
Semi-analytical Study for Cylindrical Tunnels Reinforced by Bolt-Grouting in Elastic–Brittle–Plastic Surrounding Rock Considering Nonlinear Seepage
The bolt-grouting reinforcement method can reduce water inflow and reinforce the surrounding rock in a tunnel. However, analytical theories on...
-
Progressive Failure of Blocky Rock System: Geometrical–Mechanical Identification and Rock-Bolt Support
Excavation of shallow-buried, hard rock masses usually leads to the instability of rock blocks delimited by discontinuity planes. Classic block...
-
Stability of bolt-supported concealed bedding rock slopes with respect to bi-planar failure
Bi-planar failure is one of the most common issues encountered in concealed bedding rock slopes (CBRSs). Fully grouted bolts are widely adopted to...
-
Stress analysis of full-length grouted bolt under shear deformation of anchor interface
The bolt anchoring force is closely related to the shear properties of the anchor interface. The shear stress distribution of full-length grouted...
-
Numerical Modeling of Split-Set Friction Bolt
Other than grouted type of rock bolts, such as resin or cement encapsulated bolts, friction type of bolts are also getting popular in mining and...
-
The Influence of Bolt Density on Welded Wire Mesh Performance
Rock reinforcement and surface support are typical components of ground support systems. Analytical design approaches tend to treat the ground...
-
Deformation and force analysis of inclined bolt under roadway roof separation
Full-length bonded bolt is widely used in roadway support. The structure of coal measure strata makes the roadway roof prone to separation. When the...
-
Application and research of NPR bolt for shallow-buried large-span metro tunnel
During the excavation of shallow-buried large-span metro tunnel, the surrounding rock is easily affected by the excavation disturbance, using the...
-
Effect of Cyclic Shear Loading on Shear Performance of Rock Bolt Under Different Joint Roughness
The mechanical and deformation properties of bolted joints are important research issues in rock mechanics and rock engineering. Quite a few tests...
-
Design of rock bolt-based goaf edge support for conventional depillaring with stowing
Rock bolts have replaced the conventional cog/chock as roof support from underground coal mines working with continuous miner (CM) technology in Bord...
-
Physical Model Study on Brittle Failure of Pressurized Deep Tunnel with Support System
Severe instability disasters of hard rock often occur in pressurized deep tunnels with support systems. To investigate the deformation...
-
OpenMP Parallel Finite-Discrete Element Method for Modeling Excavation Support with Rockbolt and Grouting
In the past, the number of CPU cores/threads was usually less than 8/16; now, the maximum number is 128/256. As a CPU-based parallel method, OpenMP...
