کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1757193 1523011 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of gas adsorption on mechanical properties and erosion mechanism of coal
ترجمه فارسی عنوان
تاثیر جذب گاز بر خواص مکانیکی و مکانیزم فرسایش زغال سنگ
کلمات کلیدی
جذب گاز؛ زغال سنگ؛ تغییر شکل و شکست؛ فرسایش
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• Triaxial compression test of gas-bearing coal were carried out.
• The adsorbed gas erosion effects of coal was quantified.
• Cohesion softening model was established.

In order to study coal deformation and fractured mechanism under pore gas action, we chose gases N2 and CH4 as pore fluids, and carried out triaxial compression test of gas-bearing coal. To further explore the effects of gas erosion on coal deformation and failure, we tested the deformation and rapture process of coal during gas adsorption equilibrium under fixed axial load and confining pressure. The results showed that gas adsorption decreases coal's solid surface energy and lowers coal's compressive strength, leading to larger plastic deformation in coal and final rupture instability. From the physicochemical angle, we quantified the adsorbed gas erosion effects of coal based on both Griffith crack extension theory and Mohr–Columb strength criterion, explored the mechanical characteristics and erosion damage process of gas containing coals and put forwarded their mathematical models. These models can describe the experimental phenomena fairly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 30, March 2016, Pages 531–538
نویسندگان
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