Publications by authors named "Dengming Jiao"
Article Synopsis
- The study focuses on the mechanics of a spray system during gas explosions in a specific underground pipeline in Fuxin City, using advanced FLACS numerical simulations to analyze the explosion's characteristics.
- The research compares different spray pressures to identify the optimal conditions for controlling explosions, revealing that spray pressure affects the explosion's intensity in a specific trend across different pressure ranges.
- Results indicate that the explosion's overpressure stages manifest as a rapid increase followed by a gradual decrease, with the most effective explosion suppression occurring at a spray pressure of 0.6 MPa, leading to lower peak pressures and reduced explosion duration.
To improve the prediction accuracy and time-consuming of coal mine gas occurrence law (OL), a new prediction method based on multi-source data fusion is proposed in this paper. Firstly, the method obtains the data of coal mine gas OL, determines the key data required in prediction through decision matrix, and preprocesses the data to reduce the influence of regular noise data. This paper analyzes the basic principle of multi-source data fusion, constructs the prediction model of coal mine gas OL with this technology, takes the optimal value of weighting factor as the input value of the model, and completes the design of coal mine gas OL prediction method based on multi-source data fusion.
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- Coal spontaneous combustion in gob creates risks for gas explosions, particularly in highly gassy and spontaneous combustion-prone coal seams.
- Researchers divided the stope space in Hengda Mine into connected and unconnected zones to study how gas management impacts spontaneous combustion and analyzed several factors like ventilation and nitrogen injection on gas and temperature fields.
- A proposed coordinated prevention method successfully kept gas concentrations below 0.8% during mining, reducing risks of spontaneous combustion and contributing to goals of carbon neutrality and lower greenhouse gas emissions.