-
Article
A microseismic source location method considering diffraction used in tunnel engineering
In order to improve the accuracy of rockburst warning, it is necessary to accurately interpret the microseismic (MS) information obtained during the rockburst development process. However, the MS source locati...
-
Article
Open AccessExperimental study on the failure characteristic and mechanism of granite time-delayed rockburst under true triaxial condition
A series of tests for time-delayed rockburst of granite under true triaxial condition was designed and carried out. By using the true triaxial rockburst test system, an acoustic emission (AE) system, a high-sp...
-
Article
Study on the micromechanical and crack characteristics of granite based on nanoindentation test and discrete element method
Exploring the mechanical properties and crack characteristics of granite at the grain scale is of greatly significant to understand brittle failures, such as spalling, slabbing, and rockburst of deep-buried ha...
-
Article
Rockburst time warning method with blasting cycle as the unit based on microseismic information time series: a case study
Rockburst warning includes prediction of the position, intensity, and timing of potential rockburst. Rockburst time warning refers to the prediction of the moment at or time period during which a rockburst may...
-
Article
Damage evolution and acoustic emission characteristics of hydrochemically corroded limestone
To explore the deterioration characteristics and damage principle of mechanical properties of limestone under the coupling action of aqueous chemical solution and consecutive loading-unloading cycles, the mech...
-
Article
Development and Occurrence Mechanisms of Fault-Slip Rockburst in a Deep Tunnel Excavated by Drilling and Blasting: A Case Study
In this work, an extremely intense fault-slip rockburst case, with a local magnitude of 2.3, observed in a deep tunnel in southwestern China was introduced as a case study. The rockburst caused a large economi...
-
Article
Microseismicity-based method for the dynamic estimation of the potential rockburst scale during tunnel excavation
The severity and harmfulness of a rockburst event are significantly correlated with the scale of rock mass ejection, especially when the rock mass are not supported. This paper presents a microseismicity-based...
-
Article
Identification of potential high-stress hazards in deep-buried hard rock tunnel based on microseismic information: a case study
Rockbursts, stress-induced collapse, and spalling often occur in the excavation process of deep-buried hard rock tunnel, which affect the stability thereof. The early identification of these potential high-str...
-
Article
A rockburst intensity criterion based on the Geological Strength Index, experiences learned from a deep tunnel
The occurrence of rockburst is related to the surrounding rock stress and geological rock mass strength. Rockburst occurs frequently during the construction at a deep tunnel in southwest China (a tunnel with a...
-
Article
Effects of structural planes on rockburst position with respect to tunnel cross-sections: a case study involving a railway tunnel in China
Uncertainty in the locations where rockbursts may occur with respect to a tunnel cross-section greatly increases the difficulty in monitoring and providing warnings of rockbursts and mitigating their effects. ...
-
Article
Characteristic Stress Levels and Brittle Fracturing of Hard Rocks Subjected to True Triaxial Compression with Low Minimum Principal Stress
In this study, true triaxial compression tests were carried out on three types of hard rocks (i.e., granite, marble and sandstone) using rectangular prismatic specimens (50 × 50 × 100 mm3) with low minimum princi...
-
Article
A Method for Dynamic Risk Assessment and Management of Rockbursts in Drill and Blast Tunnels
Focusing on the problems caused by rockburst hazards in deep tunnels, such as casualties, damage to construction equipment and facilities, construction schedule delays, and project cost increase, this research...
-
Article
ISRM Suggested Method for In Situ Microseismic Monitoring of the Fracturing Process in Rock Masses
The purpose of this ISRM Suggested Method is to describe a methodology for in situ microseismic monitoring of the rock mass fracturing processes occurring as a result of excavations for rock slopes, tunnels, o...
-
Article
A Microseismic Method for Dynamic Warning of Rockburst Development Processes in Tunnels
Early warning of rockbursts remains a worldwide challenge in rock engineering. In this work, a microseismicity-based method of rockburst warning in tunnels is proposed to warn of and reduce the risk of rockbur...
-
Article
Microseismic monitoring of columnar jointed basalt fracture activity: a trial at the Baihetan Hydropower Station, China
Severe stress release has occurred to the surrounding rocks of the typically columnar jointed basalt after excavation at the Baihetan Hydropower Station, **sha River, China, where cracking, collapse, and othe...
