Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Hewu Liu"'
Publikováno v:
Frontiers in Earth Science, Vol 10 (2023)
The apertures of cleats and micro-fractures in coal play an important role in the permeability of the coal bed. In this study, optical microscopy and scanning electron microscopy were used to investigate the morphology of cleats and micro-fractures a
Externí odkaz:
https://doaj.org/article/958f1a7c19124000b52a2b5e16451b7c
Publikováno v:
Frontiers in Earth Science, Vol 10 (2023)
Shear friction is an important deformation process in tectonically deformed coals (TDCs) and is closely related to the dynamic metamorphism of coal. In the current study, we perform a molecular dynamics (MD) simulation of the shear friction process o
Externí odkaz:
https://doaj.org/article/05f04bb9f9934b628e2828ab25cba7f3
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
Coal deformation is closely correlated with the distribution of organic maceral groups, however, molecular dynamics (MD) simulations of vitrinite nanoindentation have rarely been conducted. In this study, the vitrinite substrate for indentation was c
Externí odkaz:
https://doaj.org/article/e58963ffbfb44925bbb1b71e69429d19
Publikováno v:
In Journal of Geochemical Exploration May 2018 188:11-23
Publikováno v:
Energy & Fuels. 37:1857-1871
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e402df7d23dd5e5588928291fd94ecfb
https://doi.org/10.1021/acs.energyfuels.2c03548
https://doi.org/10.1021/acs.energyfuels.2c03548
Autor:
Hewu Liu
Publikováno v:
ACS Omega. 7:35942-35950
The dynamic metamorphism of tectonically deformed coals (TDCs) is closely correlated with the occurrence of coalbed methane. Here, a Raman detection technique was used to characterize two primary coals and 14 TDCs sampled from the Huaibei coalfield,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18f6aba0f38b48d48a53a42983bc9d26
https://doi.org/10.1021/acsomega.2c04737
https://doi.org/10.1021/acsomega.2c04737
Autor:
Hewu Liu, Chenliang Hou
Publikováno v:
Processes; Volume 10; Issue 9; Pages: 1875
The chemical structures of tectonically deformed coal are significantly altered by stress. However, the stress response of non-covalent bonds in deformation experiments and the role of non-covalent bonds in the deformation process of coal have not be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::896effadbdd17bc070e8c0534509009f
Publikováno v:
Minerals, Vol 9, Iss 7, p 389 (2019)
Geochemical characteristics of rocks in fault zones have been extensively studied, while there are limited studies on coal occurring in fault zones of underground coal mine. In this study, five coal samples were carefully collected from a reverse fau
Externí odkaz:
https://doaj.org/article/23203c041cd84e81b73ed63ce326c5f4
Publikováno v:
Fuel. 222:258-268
To understand the physic-chemical evolutionary characteristics and mechanisms of coal chemical structure, sub-high temperature and high pressure coal deformation experiments were conducted by using the self-developed TRTP-2000 experimental system. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::527df6e0d3e1398c0d9b1f68c6575ad1
https://doi.org/10.1016/j.fuel.2018.02.117
https://doi.org/10.1016/j.fuel.2018.02.117
Publikováno v:
Arabian Journal of Geosciences. 12
Coal organic macromolecular structure can be significantly altered by tectonic stress, but such macromolecular models are seldom reported. Here, based on the ultimate analysis, FT-IR, XPS, and 13C NMR results, three molecular models of primary coal (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fd179ba670983ce6a99e13713eced02
https://doi.org/10.1007/s12517-019-4909-8
https://doi.org/10.1007/s12517-019-4909-8