A5004506019- Rock Mechanics and Modeling
- Geoscience and Mining Technology
- Geophysical Methods and Applications
- Landslides and related hazards
- Coal Properties and Utilization
- Geomechanics and Mining Engineering
- 3D Surveying and Cultural Heritage
- Geotechnical and Geomechanical Engineering
- Earthquake Detection and Analysis
- Drilling and Well Engineering
- Mineral Processing and Grinding
- Archaeological Research and Protection
China University of Mining and Technology
2022-2024
Heat transfer and temperature evolution in overburden fracture ground fissures are one of the essential topics for identification via unmanned aerial vehicle (UAV) infrared imager. In this study, discrete element software UDEC was employed to investigate field under different mining conditions. Multiphysics COMSOL were heat influence condition, fissure depth, width, month alternation. The UAV measurements also provided a calibration numerical simulation. results showed that connected...
Abstract Mining-induced ground fissures are common problems associated with mining damage in shallowly buried coal seams the western area of China. To evaluate surface 12203 working face Huojitu Colliery Shendong area, low-altitude infrared aerial surveys were conducted on at static fissure (O-A1) and dynamic (O-A2) face. The temperature evolution patterns fissures, sand plants images analysed. relationship between overburden fractures was revealed, influence range self-healing period...
Coal and rock dynamic disasters occur frequently in deep coal mining. The loading rate affects the mechanical properties behaviors. Uniaxial compression acoustic emission (AE) tests of bump-prone under various rates were carried out, properties, AE spatiotemporal evolution, spatial fractal characteristics analyzed. experimental results indicate that uniaxial compressive strength is positively related to rate, elastic modulus increases before decreasing with rate. failure strain percentage...
Ground fissures are generated during the coal mining process due to overlying strata migration, which provides gas and water seepage channels usually contributes accidents in shallow buried seams with larger height working faces. Thus, evolution features of ground large faces were explored by considering field observation data, similar simulation, numerical simulations. The results show that weathered rock layer above thin bedrock inhibits fracture growth caused mining. Overlying expansion...
Abstract The coal and rock dynamic disasters occur more frequently in deep mining, which is tightly correlated to the instability of pillars under high stress cyclic disturbance load. In this study, strength, deformation behaviors, failure mechanism loading a high‐stress state were investigated by considering influence rate. experimental results indicate that compressive strength positively with rate, patterns, AE amplitude, spatial evolution are same various rates. damage variable shows...
ABSTRACT The frequency of dynamic disasters is escalating in deep coal mining, with an increasing number induced by the combined static and loading. To investigate mechanical behavior sandstone under cyclic disturbance, uniaxial loading, unloading tests equal amplitude were conducted at four different disturbance rates on basis influence loading properties, fracture characteristics, acoustic emission (AE) temporal‐spatial evolution, fractal characteristics AE spatial distribution analyzed....
During coal mining, the mechanical and deformation behavior of overburden is affected by water stress. Therefore, it great significance to study surrounding rock under action hydraulic coupling. For high-intensity mining with shallow seam large strong strata in stope, support often damaged. Based on basic experiments physical similarity simulations, fracture western area coupling was studied. The results show that loading rate range 0.5~5 mm/min, compressive strength sandstone increases...