A5103147556- Rock Mechanics and Modeling
- Coal Properties and Utilization
- Hydraulic Fracturing and Reservoir Analysis
- Geotechnical and Geomechanical Engineering
- Geophysical Methods and Applications
- Geoscience and Mining Technology
- Drilling and Well Engineering
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geomechanics and Mining Engineering
- Hydrocarbon exploration and reservoir analysis
- NMR spectroscopy and applications
- Atmospheric and Environmental Gas Dynamics
- Mineral Processing and Grinding
- Methane Hydrates and Related Phenomena
- Geophysical and Geoelectrical Methods
- Infrastructure Maintenance and Monitoring
- Non-Destructive Testing Techniques
- Seismology and Earthquake Studies
- Hydraulic and Pneumatic Systems
- Fire effects on concrete materials
- Geological Modeling and Analysis
- Landslides and related hazards
- Electromagnetic Launch and Propulsion Technology
- Geotechnical Engineering and Underground Structures
Chongqing University
2017-2025
Taiyuan University of Technology
2023
China Coal Technology and Engineering Group Corp (China)
2015
State Key Laboratory of Gas Disaster Detecting, Preventing and Emergency Controlling
2015
Shandong University of Science and Technology
2008
Resistivity will have different response characteristics to the hydraulic fracture propagation process. In this work, a resistivity testing system for fracturing specimens was established. and acoustic emission (AE) information were jointly analysed determine dynamic of during propagation. The results show that water exert competitive influence on connection structure circuit, there are two significant peak points in curve, presenting double therein. data specimen with larger area much from...
Liquid carbon dioxide phase transition explosion has attracted significant attention due to its special advantages in coal seam fracturing. However, existing studies lack detailed explanations of the dynamic damage mechanism and comprehensive analyses crucial influencing factors. This paper investigates effects pressure rise rate, confinement pressure, borehole arrangement on fracture propagation using numerical simulations. The main conclusions are as follows: shear primarily occurs around...
Liquid carbon dioxide (L-CO2) phase transition blasting technology, known for its high efficiency, environmental friendliness, and controllable energy output, has been widely applied in mine safety fields such as coal roadway pressure relief seam permeability enhancement. However, the synergistic control mechanism between L-CO2 loads situ stress conditions on fracturing enhancement remains unclear. This study systematically investigates key process parameters of deep seams using response...
To optimize the performance of RC-DTH air hammer, a mathematical model detailing each phase piston’s movement has been constructed in present work. Simultaneously, novel piston structure hammer (Type B) with diverse internal flow proposed. The impact structurally modified is analyzed using Computational Fluid Dynamics (CFD). Additionally, an energy testing system for developed to confirm validity numerical simulation results. Research results have shown that enhancing both intake stroke...
According to the characteristics of coal-rock dynamic disasters and hydraulic slotting, mechanism load barrier static pressure relief in slotting is proposed. The stress distribution a coal mining face slotted area section pillar analyzed by numerical simulation. results show that slot formed can effectively alleviate concentration transfer high-stress deeper seam. When blocking propagation path seam, wave intensity transmitted into greatly reduced, so risk disaster reduced. A field...
Based on the analytical solution of gas diffusion in spherical coal particles with a constant coefficient, calculation method time-varying coefficient is proposed by constructing objective function. The behavior methane, nitrogen and carbon dioxide was studied. results show that increase time, coefficients exhibit an attenuation characteristic, eventually approaching limit value individually. larger than smallest. Significant phenomenon limited observed for strong adsorption capability....
Abstract Complex civil structures require the cooperation of many building materials. However, it is difficult to accurately monitor and evaluate inner damage states various material systems. Based on a convolutional neural network (CNN) acoustic emission (AE) time‐frequency diagram, we used transfer learning method for classifying AE signals different materials under external loads. The results show CNN model can classify cracks that come from based signals. recognition accuracy reach 90%...
Coal and gas outburst is a dynamic phenomenon with violent eruptions of coal from the working seam. It has been proved that rapid desorption within short period necessary for occurrence an outburst. Due to limitation present test condition, characterization first 60 s not researched sufficiently. In study, experimental apparatus ability high-frequency data collection was developed. Initial methane carbon dioxide in experimentally studied. Both initial were studied different equilibrium...
Resistivity is the core electrical parameter of coal-field prospecting technology to identify geological anomaly areas. Studying change characteristics resistivity coal under loading helpful further improve accuracy electric in delineating abrupt area structure and enhance ability reduce avoid disasters mine production processes. In this study, raw coal-like specimens was monitored uniaxial compression. The influence mechanism coupling moisture on analyzed. Additionally, law during...