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Article
Influence of Weak Dynamic Disturbances on Rockburst Occurring in the Borehole Containing a Small-Scale Single Structural Plane: An Experimental Study
Structural plane plays an important role in affecting the rockburst, especially when it is subjected to an external dynamic disturbance. To investigate the influence of weak dynamic disturbances on a structura...
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Article
Influence of Axial Stress on Borehole Rockburst: Insights from True-Triaxial Tests using Granite Specimens
In this study, structural model tests using cubic granite specimens of 100 mm × 100 mm × 100 mm with a centered horizontal circular hole of 50 mm diameter were used to investigate the influence of axial stress...
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Article
A two-step method for predicting rockburst using sound signals
Rockburst (equal to strainburst in this paper), a typical catastrophic geohazard, poses a major threat to the safety of employees and infrastructure in deep rock engineering. Fortunately, accidents can be redu...
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Article
Influence of Principal Stress Direction on the Fracture Characteristics of Granite with an Inverted U-Shaped Cavity
The direction of in situ stress is an important factor influencing the fracture characteristics of the surrounding rock of underground tunnels. In this study, to investigate the influence of the principal stre...
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Article
A sound-based machine learning method for crack-type recognition in hard rock
The recognition of tensile and shear cracks during hard rock cracking is critical for early warning of rockbursts in deep rock engineering. However, direct observation of cracking inside hard rocks by imaging ...
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Article
Experimental Study on the Influence of a Small-Scale Single Structural Plane on Rockburst in Deep Tunnels
To investigate the influence of a small-scale single structural plane with hard fillings in the surrounding rock of deep tunnels on the rockburst process, a series of biaxial compression tests were conducted o...
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Article
Experimental Study on the Effects of Water Saturation on the Microseismic and Acoustic Emission Characteristics of Sandstone in Different Stress States
To investigate the evolution characteristics of microseismic (MS) and acoustic emission (AE) of sandstone before and after water saturation in different stress states and the precursory information of rock fai...
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Article
Characteristics of microseism generated during rock shear failure under different normal stress conditions: an experimental study
To investigate the characteristics of the acoustic emission and microseism occurring during rock shear failure, we conducted a series of direct shear tests on the cubic specimens under different normal stress ...
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Article
Construction Technology of Micro Bench Cut Method for Weak Rock Tunnel with High In-situ Stress
Taking Shanyang tunnel of Dali to Ruili (DaRui) railway as background, the construction technology of micro bench cut method for weak rock tunnel with high in-situ stress is established by combining the full-f...
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Article
Experimental Study on the Failure Characteristics of Granite Subjected to Weak Dynamic Disturbance Under Different σ3 Conditions
During underground excavation, rocks are generally subjected to weak dynamic disturbances caused by blasting, machine vibration, rockburst. To investigate the failure characteristics of hard rock subjected to ...
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Article
Experimental study on the characteristics of microseismic signals generated during granite rockburst events
Rockburst is a typical catastrophic phenomenon in deep underground excavation. Microseismic (MS) monitoring is an extremely significant technique for rockburst prediction. The effectiveness of rockburst warni...
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Article
Mechanism of Structural–Slip Rockbursts in Civil Tunnels: An Experimental Investigation
Structural–slip rockbursts are frequently faced in civil tunnels, which pose huge threats to the safety of personnel and equipment in tunnels. In this study, the core features of structural–slip rockbursts wer...
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Article
Cracking Characteristics of the Surrounding Rocks of a Hydraulic Tunnel Under High Geothermal Conditions: A Model Test
In the present study, a physical model test was used to investigate the cracking characteristics of the surrounding rocks of hydraulic tunnels under high geothermal conditions. Based on similarity theory, a si...
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Article
Effect of initial minimum principal stress and unloading rate on the spalling and rockburst of marble: a true triaxial experiment investigation
Hard rock often performs as brittle failures, such as cracking, spalling, and rockburst, induced by excavation in deep underground engineering. To understand the effect of the minimum principal stress and unlo...
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Article
Effect of the propagation direction of the weak dynamic disturbance on rock failure: an experimental study
Weak dynamic disturbance caused by drilling and blasting, adjacent rockburst, and machine vibration is a key factor to rock failure/rockburst during underground excavation. Meanwhile, the propagation direction...
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Article
Fracture evolution during rockburst under true-triaxial loading using acoustic emission monitoring
This paper investigates the fracture evolution during rockbursts of granodiorite and basalt that appeared to be representatives of two different rockburst modes under true-triaxial loading using acoustic emiss...
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Article
Effect of initial damage on remotely triggered rockburst in granite: an experimental study
A remotely triggered rockburst is a typical engineering geology disaster that occurs during the excavation of hard rock at depth. Damage in the rock mass naturally exists and will also be induced by the constr...
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Article
True-Triaxial Experimental Study on Mechanical Behaviours and Acoustic Emission Characteristics of Dynamically Induced Rock Failure
Dynamic disturbance is an important factor for the failure of surrounding rocks in underground engineering projects, particularly under high static stress conditions. In this study, three dynamic disturbances ...
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Article
Experimental study on energy dissipation of fragments during rockburst
In this study, rectangular prismatic coarse-grain granites were analyzed through an application of a modified true-triaxial rockburst testing system. Various loading rates were considered in a process in which...
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Article
Influence of loading rate on strainburst: an experimental study
Rockburst is a geological disaster in highly stressed ground. As a typical rockburst, strainburst is an ejection failure phenomenon caused by tangential stress concentration, which is frequently encountered in...
