A5026950537- Rock Mechanics and Modeling
- Geomechanics and Mining Engineering
- Geotechnical and Geomechanical Engineering
- Landslides and related hazards
- Tunneling and Rock Mechanics
- Geophysical Methods and Applications
- Geoscience and Mining Technology
- Drilling and Well Engineering
- Grouting, Rheology, and Soil Mechanics
- Earthquake Detection and Analysis
- Coal Properties and Utilization
- Mineral Processing and Grinding
- Advanced Combustion Engine Technologies
- earthquake and tectonic studies
- Structural Response to Dynamic Loads
- High-Velocity Impact and Material Behavior
- Combustion and flame dynamics
- Geotechnical Engineering and Underground Structures
- Tailings Management and Properties
- High-pressure geophysics and materials
- Atmospheric chemistry and aerosols
- Dam Engineering and Safety
- Mechanical stress and fatigue analysis
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
Shandong University of Science and Technology
2015-2024
Shanghai Ocean University
2023
Shanghai Jiao Tong University
2001-2022
Changsha University of Science and Technology
2019-2021
Ministry of Science
2017-2019
Anhui University of Science and Technology
2015
China University of Mining and Technology
2014-2015
Heilongjiang University of Science and Technology
2014
Strain burst occurs within highly stressed hard rocks in underground excavations. A prerequisite for strain bursting is that excess energy exists to eject material after rock failure. Both the and surrounding mass will contribute energy. However, proportion of contributed from each currently not well understood. This issue be quantitatively investigated this study. In paper, sources conversion during are first illustrated two conceptual models. The portions dissipated released differentiated...
Abstract Acoustic emission (AE) signals contain substantial information about the internal fracture characteristics of rocks and are useful for revealing laws governing release energy stored therein. Reported here is evolution rock failure with different master crack types as investigated using Brazilian splitting tests (BSTs), direct shear (DSTs), uniaxial compression (UCTs). The AE parameters typical modes each type were obtained, mechanism discussed. From observed changes in parameters,...
The stability of coal–rock composite structures is essential for the safety coal mine production. To explore failure characteristics and energy evolution law structures, uniaxial cyclic loading–unloading tests gypsum–rock combination specimens are conducted. Test results show that peak stress elastic modulus increase linearly with increasing rock strength, as well intensity. When strength increases, accumulation rate a specimen decreases, but total accumulated increases before prepeak...
Using gangue backfilling in underground coal mining not only controls the roof deformation gob area but also reduces amount of waste rock. However, due to limitations complicated engineering conditions, steep seam is widely applied. In this study, a long-distance technology with scraper winch for was proposed and applied flexible shield supporting working face Datai Mine, Beijing. Aiming at problem decreasing ratio field practice, numerical simulation carried out research moving law goaf....
Abstract Field investigations have proven that layer‐crack structures make an essential contribution to rock burst occurrence in brittle coal or mass. This paper first studies the mechanical behavior of red sandstone specimens with different geometric configurations vertical fissures (ie, fissure width, length, and number) through uniaxial compression Brazilian tests. Then, digital speckle correlation method (DSCM) acoustic emission (AE) technique are used record deformation failure...
Rock joints exhibit hysteresis shearing behavior and produce energy dissipation under shear cyclic loads, which however cannot be accurately depicted by existing constitutive models. This paper establishes a model for associated of rock joints. Analytical expressions the during processes are derived. Derivation indicates no in elastic stage. When load exceeds boundary, nonlinear takes place. Validations with experiments show that proposed provides good conformities direct curves loops, can...
Abstract The surrounding rock of swelling soft roadway has high clay mineral content, strong expansibility after encountering water, low strength and poor cementation. is prone to large deformation under the influence complex geostress. Combined with support change development 2# coal in Hongqingliang mine, through geological survey, field observation indoor test, failure mechanism traditional method “anchor bolt + anchor cable mesh shotcrete” was revealed by adjustment stress excavation...
Blasting presplitting is an effective method for preventing rock bursts in thick hard roofs. In this study, two adjacent working faces the No. 10 mining area of Jining 2 coal mine were considered as case studies, and conditions face construction parameters roof blasting introduced. The microseismic characteristics during period analyzed, indices evaluating proposed. Accordingly, influence on surrounding was evaluated. results showed that frequency events changed with stage face. After...
With the increasing depth of coal mining each year, rock burst has emerged as one most severe dynamic disasters in deep mining. The research status prevention and control theory is summarized. Focused on mining, major issues encountered researching bursts are Subsequently, scientific connotation stress relief-support reinforcement cooperative mines proposed. Then, mechanisms underlying directions coordinated present a preliminarily theoretical framework for outlined. To tackle key problems...