Improved Calculation Model for the Shortest Spontaneous Combustion Period.
Yulong Gao1,2,3, Siyi Lin2,3, Wenhua Hu2,3
1School of Environment, Harbin Institute of Technology, Harbin 150090, China.
ACS Omega
|September 28, 2020
Summary
A new continuous model accurately calculates the shortest spontaneous combustion period (SSCP) for coal, improving upon traditional methods. This advancement aids in preventing coal fires and mitigating associated risks.
Area of Science:
- Geotechnical Engineering
- Mine Safety
- Combustion Science
Background:
- Coal spontaneous combustion poses significant risks, causing resource loss, fatalities, and environmental damage.
- Calculating the shortest spontaneous combustion period (SSCP) is crucial for prevention but has been a long-standing challenge.
Purpose of the Study:
- To develop an improved, continuous model for calculating the SSCP.
- To overcome the limitations of traditional time summation models in SSCP calculation.
Main Methods:
- A novel continuous model was developed, transforming the traditional time summation into a time integration form.
- The model's accuracy and convenience were validated against traditional and numerical models.
- Sensitivity analysis was performed on key parameters influencing SSCP.
Main Results:
- The continuous model demonstrated good agreement with traditional and numerical models in SSCP calculations.
- The improved model offers enhanced accuracy and convenience compared to the traditional approach.
- Key parameters influencing SSCP include heat release intensity, water content, specific heat capacity, and gas content.
Conclusions:
- The developed continuous model provides a more accurate and convenient method for SSCP calculation.
- This model has the potential to significantly aid in the prevention and control of coal spontaneous combustion risks.
- Further testing in practical mine management is recommended.
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