A5024264218- High-Velocity Impact and Material Behavior
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Rock Mechanics and Modeling
- Erosion and Abrasive Machining
- Drilling and Well Engineering
- Geotechnical Engineering and Underground Structures
- Dam Engineering and Safety
- Tunneling and Rock Mechanics
- Reservoir Engineering and Simulation Methods
- Geological Studies and Exploration
- Advanced Surface Polishing Techniques
- Concrete and Cement Materials Research
- Seismic Imaging and Inversion Techniques
- Fluid Dynamics Simulations and Interactions
Chongqing Jiaotong University
2020-2021
Tsinghua University
2018
Abrasive Water Jet (AWJ) technology has vast application prospects in the assisted drill‐blasting of tunnel excavation, with advantages fast‐breaking speed, low tool wear, less dust, and good mobility. Nevertheless, AWJ some limitations shortcomings, such as small effective fracturing range parameter mismatch, which influence effect AWJ. To solve abovementioned issues, it is necessary to study failure mechanism rock impacted by nozzle effects on fragmentation. Based coupling algorithm Smooth...
Abrasive water jet (AWJ) breaking technology is suitable for the maintenance and repair of concrete structures, generating minimal dust, low tool wear, no vibrations or selective destruction. The failure features mechanisms subjected to AWJ impact are fundamental issues technology, which also related safety quality engineering construction. Based on computed tomography (CT), scanning electron microscopy (SEM), image processing this paper studied fragmentation pattern removal mechanism under...
Abstract In order to study the crack evolution rules of hydraulic fracturing rock with different hardness, a numerical model was established. It explored expansion length, width, propagation rate and initiation pressure hardness rocks. The results show that along length were positively correlated width negatively hardness. addition, considering effect in-situ stress difference, it took granite as an example, studied difference on propagation. is found increases, decreases, shows linear...
Pre-existing fracture and secondary cracks in rock mass are formed by natural power, such as magma condensed to igneous rocks tectonic movement. The orientation inclination of these fractures obey certain laws relating the stress, temperature, minerals, water so on. Therefore, react differently under same external loading on condition various inclination, fissure apertures, stiffness joint roughness. To simulate crack propagation, experiments hollow cylinder cut one oblique interface...
Abstract High-pressure water jet crushing concrete has significant advantages in safety, quality and environmental protection, which a broad application prospect the maintenance reconstruction of building. Nevertheless, it still some problems such as high threshold pump pressure large specific energy consumption. Water breaking with liquid nitrogen (LN 2 ) cold shock assistance combined low-temperature-induced fracturing hydraulic impact can effectively reduce working improve utilization...