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Effect of in-situ stresses on fracturing performance of crater blasting under different resistance lines
In deep underground mining, high-stress condition plays a key role in rock blasting. However, the mechanism of rock breaking by blasting under...
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Shear-induced rockburst of double-tunnel rocks subjected to shear loading: A comparative analysis
Understanding triggering mechanism of shear-induced rockburst is of great significance for design, construction and operation in underground...
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Improving blast-induced tunnel profile under different in-situ stresses
Contour blasting techniques with pre-cutting areas are deemed as promising methods to improve the contour quality of tunnel with high in-situ stress....
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Intelligent hybrid model to classify failure modes of overstressed rock masses in deep engineering
Squeezing, slabbing, and strainburst are typical failure modes of overstressed rock masses in deep rock excavation engineering. This study considered...
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Study of slope vibration site effects and energy analysis from CO2 static blasting
The novel CO 2 static blasting method offered good prospects for application as it was more effective than mechanical rock breaking, less vibratory,...
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Numerical investigation of effect of eccentric decoupled charge structure on blasting-induced rock damage
Eccentric decoupling blasting is commonly used in underground excavation. Determination of perimeter hole parameters (such as the blasthole diameter,...
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Damage mechanism and fracture evolution of rock containing defects with LCEM-GFEM method under explosive load
Defects in rock masses have significant influence on the fracture propagation during blasting. In this study, a numerical model is developed using...
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Formation mechanism of rockburst in deep tunnel adjacent to faults: Implication from numerical simulation and microseismic monitoring
Rockbursts were frequently encountered in the construction of deeply buried tunnels at the ****-II hydropower station, Southwest China. In those...
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Experimental investigation on synergetic prediction of granite rockburst using rock failure time and acoustic emission energy
The frequent occurrence of rockburst and the difficulty in predicting were considered in deep engineering and underground engineering. In this work,...
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Numerical study on crack propagation under explosive loads
Dynamic crack propagation in brittle materials plays an important role in understanding the fracture mechanism. Numerical simulations on crack...
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Dynamic response analysis of a small-scaled ACLNG storage tank under penetration and explosion loadings
The all-concrete liquefied natural gas (ACLNG) storage tank promises a great prospect for development. The process of the storage tank being impacted...
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Key technology of gob-side entry retained by roof cutting without coal pillar for hard main roof: A typical case study
This study results from the authors’ long-term efforts to develop key technology of gob-side entry retained by roof cutting under hard main roof....
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Contour blasting parameters by using a tunnel blast design mode
The quality of contour blasting depends on many initial blasting parameters. The parameters including blasthole diameter, rock Protodyakonov...
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Discrimination of mining microseismic events and blasts using convolutional neural networks and original waveform
Microseismic monitoring system is one of the effective methods for deep mining geo-stress monitoring. The principle of microseismic monitoring system...
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Numerical simulation of dynamic fracture properties of rocks under different static stress conditions
When underground cavities are subjected to explosive stress waves, a uniquely damaged zone may appear due to the combined effect of dynamic loading...
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A dynamic constitutive model of ultra high toughness cementitious composites
In this study, an explicit dynamic constitutive model was established for ultra high toughness cementitious composites (UHTCCs). The model, based on...
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Case study of microseismic tomography and multi-parameter characteristics under mining disturbances
Rockburst caused by mining disturbance may cause rock damage. Combining the microseismic (MS) multiparameter, high-magnitude MS event distribution,...
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Experimental investigation on failure process and spatio-temporal evolution of rockburst in granite with a prefabricated circular hole
To study the mechanism of rockburst and its spatio-temporal evolution criterion, a rockburst simulation experiment was performed on granite...
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Acoustic emission precursors of static and dynamic instability for coarse-grained hard rock
To investigate the acoustic emission (AE) precursors of coarse-grained hard rock instability, an experimental study on the rockburst and slabbing...
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Stress initialization methods for dynamic numerical simulation of rock mass with high in-situ stress
In the context of deep rock engineering, the in-situ stress state is of major importance as it plays an important role in rock dynamic response...