煤粒瓦斯放散模型对比分析
Comparison Analysis on Gas Emission Model of Coal Particle
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摘要: 根据煤粒瓦斯放散的机理，将常见的几种放散模型分为扩散型、渗透型、实验型3类。通过放散模型和实验结果的对比，表明渗透模型中的新解吸式与实验结果的拟合度最高；然后绘制了4种煤样在不同初始瓦斯压力下新解吸式和实测结果的对比曲线，发现两者在各种条件下都比较吻合。因此，新解吸式可较准确地描述煤粒瓦斯的放散规律，有助于指导工程实践，进一步分析还得出煤粒中的瓦斯放散更符合达西定律。Abstract: According to the mechanism of gas emission in coal particle, several common emission models were divided into three kinds, namely diffusion, permeation, and experiment type. Comparing emission models with experimental results, it showed that the new desorption formula in permeation models and experimental results had the highest fitting degree. Then the contrast curves of four kinds of coal samples between the new desorption formula and the experimental results under different initial gas pressure are plotted, it is found that they are consistent with each other in different conditions. Therefore, the new desorption type could describe the gas emission law in coal particle more accurately, which was helpful to guide the engineering practice. The further analysis indicated that the gas emission in coal particle accorded with Darcy law better.
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Keywords:
- coal particle /
- gas emission /
- diffusion model /
- permeation model /
- emission mechanism
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