کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
294486 | 511484 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An rescaled range analysis on the characteristics of coal seam development in the Eastern depression of the Liaohe Basin An rescaled range analysis on the characteristics of coal seam development in the Eastern depression of the Liaohe Basin](/preview/png/294486.png)
The characteristics of coal seam development, and the prospects of a favorable coal-forming area, were evaluated for the Liaohe Basin located in China. The Number 3 and Number 9 coal seam thickness series from 60 nearly equally spaced bores in the Eastern depression of the Liaohe Basin were examined by a rescaled range analysis. The results indicate that the Hurst exponents of the Number 3 and Number 9 coal seam thickness series are 0.69 and 0.68, respectively. This suggests the presence of persistence. As the bore spacing increases the Hurst exponent of the Number 3 series gradually decreases (H changes from 0.69 to 0.52) and shifts from persistence to randomness. The Hurst exponent of the Number 9 thickness data gradually increases (H changes from 0.68 to 0.91) and always shows the characteristic of persistence. A combination of geological characteristics and the series data allow the conclusion that it is more suitable for the Number 9 coal seam to form in the Northeastern part of the Eastern depression than the Number 3 coal seam.
Journal: Mining Science and Technology (China) - Volume 21, Issue 2, March 2011, Pages 223–227