The Porosity Dynamic Model of the Compacted Broken Coal
release_zl25pjj55bgd3ekjsb7uw7brtq
by
Xuefeng Han, Tingxiang Chu, Minggao Yu, Jiangkun Chao, Zhihui Ma, Xinlei Yang
Abstract
In order to study the dynamic change law of the porosity of the compacted broken coal under different axial stress loading, based on the environment of the broken and compacted coal in the gob, aiming at the influence of the porosity on the spontaneous combustion of the coal, combined with the fractal theory, the fractal model of the porosity of the broken coal is established. A self-designed "testing device for permeability evolution and spontaneous combustion characteristics of crushed coal under pressure" is used to carry out axial loading test on selected coal samples in the gob. By comparing and analyzing the calculated results of void dynamic evolution model and experimental data, it is found that the relative error of void dynamic evolution model is between 2.8% and 6.2%, which meets the engineering needs. According to the stress-strain curve, initial accumulation state parameters, fractal dimension of initial crushing, and particle size distribution, the change of porosity under different compacted conditions can be predicted by the model, which has certain significance for identifying the change of compacted broken coal porosity and analyzing the process of coal spontaneous combustion and oxidation.
In application/xml+jats
format
Archived Files and Locations
application/pdf 3.0 MB
file_dm6qd5i5dvhurdfuoysvel67sq
|
downloads.hindawi.com (publisher) web.archive.org (webarchive) |
Open Access Publication
In DOAJ
In ISSN ROAD
In Keepers Registry
ISSN-L:
1687-8086
access all versions, variants, and formats of this works (eg, pre-prints)
Crossref Metadata (via API)
Worldcat
SHERPA/RoMEO (journal policies)
wikidata.org
CORE.ac.uk
Semantic Scholar
Google Scholar