A5066001152- Coal Properties and Utilization
- Combustion and Detonation Processes
- Geoscience and Mining Technology
- Energetic Materials and Combustion
- Risk and Safety Analysis
- Fire dynamics and safety research
- Geomechanics and Mining Engineering
- High-Velocity Impact and Material Behavior
- Hydrocarbon exploration and reservoir analysis
- Rock Mechanics and Modeling
- Structural Response to Dynamic Loads
- Combustion and flame dynamics
- Wind and Air Flow Studies
- Safety and Risk Management
- Traffic Prediction and Management Techniques
- Advanced Combustion Engine Technologies
- Simulation and Modeling Applications
- Industrial Gas Emission Control
- Nuclear Engineering Thermal-Hydraulics
- Polymer crystallization and properties
- Coal and Its By-products
- Coal Combustion and Slurry Processing
- Nuclear Issues and Defense
- Tunneling and Rock Mechanics
Beijing Institute of Technology
2022-2024
Shandong University of Science and Technology
2017-2024
Swinburne University of Technology
2024
Xi'an Jiaotong University
2024
Pipeline transportation has become the main mode of natural gas transportation. Due to inevitable aging, corrosion, and third-party damage, pipeline leakage accidents occur frequently. Leakage in tunnel will lead accumulation gas, potential explosion risk threaten tunnel's safety. It is significant elaborate on diffusion behavior leaked space for traceability points formulation safety technical measures. In this paper, a scale-down experimental platform built, influence pressure...
To evaluate the explosion hazard of CH4/H2 mixtures, experiments were conducted in a long and closed pipeline with length-to-diameter ratio 51 built-in obstacles, characteristic parameters deflagration shock waves analyzed under different hydrogen blending ratios (0 ≤ λ 100%) equivalence (0.5 Φ 3). The results indicate that within range = 0.8–1.2, overpressure (PP) exhibits "two-zone" structure distribution. When 0 80%, PP shows an initial increase then decrease both regions, while to...
In this report, the influence of pre-oxidation degree and ventilation flow on parameters spontaneous combustion coal (temperature, gas concentration, exothermic intensity) was studied in six sets programed temperature experiments. The experimental results showed that exerted a positive effect early stage coal-oxygen recombination reaction, but an inhibitory later oxidation reaction. Air supply rate had correlation with initial samples 90 °C parameters. negative 140 samples. Meanwhile,...
After coal seam mining, the residual is soaked with accumulated water in goaf, and its spontaneous combustion characteristics were changed after air-dried. To study reoxidation of air-dried coal, temperature-programmed experiments carried out, cross point temperatures index gases investigated. Results showed that temperature raw (146.3 °C) was reduced to 137.1 °C it pre-oxidized at 90 °C. The water-soaked, (96 h) 122.5 °C, while (90 111.5 Although CO produced initial slow oxidation phase,...
The low-temperature oxidation law of coal and rock mass is the basis to study spontaneous combustion in goafs. In this paper, laws coal, oil shale, mixtures shale were studied by using laboratory programmed heating experiments combined with a field beam tube monitoring system. results from showed that heat released was less than coal. Coal had lower carbon monoxide (CO)-producing temperature mixture obvious inhibiting effects on CO production an average concentration about 38% for Index...
The addition of ammonia and hydrogen into natural gas fuel is an effective method to reduce carbon emissions. This study aims investigate the effect adding on mechanism combustion emission characteristics. Based a self-developed mixed deflagrate experimental platform, characteristics, chemical reaction kinetics fuels under different composition ratios (natural 0-100%, 10-85%, 0-100%) were studied. results indicate that propagation deflagration shock wave can be categorized initial stage (
To improve the borehole sealing effect of coal seam water infusion, especially that with low permeability and high rigidity, this study investigated performance test optimization two cement‐based materials. The requires high‐pressure infusion. Result shows when water‐cement ratio is 0.4 amount fiber expansive agent 10%, new material displays microexpansion. In addition, 1‐day compressive strength reaches 16 MPa. This result satisfies requirement under 30 MPa also excellent. According to...
Preliminary communication
The paper presents the damage results of thick steel plates subjected to local blast loading using experimental and numerical approaches. Three with a thickness 17 mm under contact explosion trinitrotoluene (TNT) explosives were tested, damaged parts scanned scanning electron microscope (SEM). ANSYS LS-DYNA software was used simulate plate. By analyzing comparing simulation results, influence law TNT acting on plate, mode reliability verification simulation, criterion for judging plate...
Aluminum powder has been widely applied to various industries. However, its high activity and burn rate can cause serious explosion risks. Many factors affecting the of aluminum have determined, yet moisture content not included. In present work, minimum explosible concentrations powders with different contents were measured a 20-liter test apparatus using accident in Kunshan, China, as study case. The experimental results suggest that concentration dramatically increases increase first...
To accurately characterize the mesoscopic properties of NEPE (Nitrate Ester Plasticized Polyether) propellant, mechanical contraction method was used to construct a representative volume element (RVE) model. Based on this model, macroscopic response propellant at strain rate 0.0047575 s−1 simulated and calculated, parameters cohesive zone model (CZM) were inversely optimized using Hooke–Jeeves algorithm by comparing simulation results with uniaxial tensile test propellants. Additionally,...