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基于Busch单孔模型结合Fick第二定律构建了低阶煤损失气量的数学模型,修正了美国USBM方法测试含气量公式。以新疆阜康矿区低阶煤层为研究对象,分别采用修正模型法、等温吸附反演法、美国USBM法进行含气量计算或测试。结果表明:美国USBM法对损失气量估算不准确,其结果比修正模型法和等温吸附反演法低1~3.5 m~3/t。修正后的含气量计算结果与等温吸附反演结果相差不大,更能较真实的反映低阶煤层实际含气量。
Based on Busch single-hole model and Fick’s second law, a mathematical model of low-rank coal loss gas was constructed and the gas content formula of the U.S. USBM method was modified. Taking the low rank coal seam in Fukang mining area of Xinjiang as the research object, the modified model method, the isothermal adsorption inversion method and the USBM method of the United States were used to calculate or test the gas content. The results show that the estimation of lost gas volume by USBM method in the United States is inaccurate, and the result is 1 ~ 3.5 m ~ 3 / t lower than the modified model method and isothermal adsorption inversion method. The corrected gas content calculation results are similar to the results of isothermal adsorption inversion, which can more accurately reflect the actual gas content of low-rank coal seams.