کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
276598 1429549 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deformed coal types and pore characteristics in Hancheng coalmines in Eastern Weibei coalfields
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Deformed coal types and pore characteristics in Hancheng coalmines in Eastern Weibei coalfields
چکیده انگلیسی

Based on SEM observance, the methods of low-temperature nitrogen and isothermal adsorption were used to test and analyze the coal samples of Hancheng, and pore structure characteristics of tectonic coals were discussed. The results indicate that in the same coal rank, stratification and crack are well developed in cataclastic coal, which is mostly filled by mineral substance in the geohydrologic element abundance, results in pore connectivity variation. Granulated and mylonitic coal being of these characteristics, as develop microstructures and exogenous fractures as well as large quantity of pores resulted from gas generation and strong impermeability, stimulate the recovery of seepage coal, improve coal connectivity and enhance reservoir permeability. Absorption pore (micro-pore) is dominant in coal pore for different coal body structure, the percentage of which pore aperture is from 1 to 100 nm is 71.44% to 88.15%, including large of micro-pore with the 74.56%–94.70%; with the deformation becoming more intense in the same coal rank, mesopore enlarge further, open-end pores become thin-neck-bottle-shaped pores step by step, specific surface area of micro-pore for cataclastic coal is 0.0027 m2/g, while mylonitic coal increases to 7.479 m2/g, micro-pore gradually play a dominant role in effecting pore structural parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mining Science and Technology - Volume 22, Issue 5, September 2012, Pages 681–686
نویسندگان
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