Moisture penetration and distribution characterization of hard coal:Aμ-CT study
Lihai Tan1
Ting Ren2
Linming Dou3
Jian Sun4
Xiaohan Yang5
Ming Qiao6
1.School of Resource Environment and Safety Engineering,University of South China,Hengyang 412001,PR China2.School of Civil,Mining and Environmental Engineering,University of Wollongong,Sydney,NSW 2522,Australia;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Jiangsu 221116,PR China3.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Jiangsu 221116,PR China4.School of Energy and Safety Engineering,Anhui University of Science and Technology,Anhui 232001,PR China5.School of Energy and Safety Engineering,Anhui University of Science and Technology,Anhui 232001,PR China;School of Civil Engineering,The University of Queensland,Brisbane,QLD 4072,Australia6.School of Civil,Mining and Environmental Engineering,University of Wollongong,Sydney,NSW 2522,Australia
摘要：Moisture content of rock/coal can change its mechanical properties and absorption capacities,which can directly affect gas diffusivity,change the stress distribution and hence cause significant impacts on the overall gas or coal extraction process.Observation of the water penetration process and water distribution in the coal matrix will be beneficial for the understanding of the fluid-solid coupling mechanism in hydraulic fracturing,aquifer cracking and coal seam infusion.However,the observation of water penetration process and the determination of water distribution mode were hard to be non-destructively achieved as coal is a non-uniform,inhomogeneous and un-transparent material.μ-CT imaging,which is based on variation of X-ray attenuation related to the density and atomic composition of the scanned objects,enables a four-dimensional(spatial-temporal)visualise of the heterogeneous and anisotropic coal samples.The primary aim of this paper is extending the application of μ-CT imaging to explore the moisture penetration and distribution within coal sam-ples during water infusion process,which has been reported by very little literature.The working principle and procedures of CT imaging was firstly introduced.Then,the determination equation of moisture distribution based on density profile was established.The CT determined moisture content has been compared with weighting method for verification.The paper has demonstrated that μ-CT can be used for non-destructively imaging the moisture distribution within coal samples.
机标关键词：distributionstudycharactercoalhardmoisturepenetration
论文发表日期：2024-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：9( 216-224 )
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