Article
Energy & Fuels
Yunbo Li, Xingxin Guo, Dangyu Song, Shimin Liu, Jienan Pan, Haifeng Wang
Summary: This study investigates the impact of coal deformation on nanoscale pores and adsorption behaviors through the analysis of undeformed and tectonically deformed coal samples. The results show that intense tectonic stresses facilitate the recombination of small molecular side chains, leading to an enhanced extraction rate. The deformation process of coal causes a significant expansion of pores, especially micropores, and an increased number of micropores due to shear slip, ductile deformation, and maceral fragmentation. The adsorption capacity is influenced by the presence of small molecular structures, and the removal of these structures diminishes adsorption capacity.
Article
Geosciences, Multidisciplinary
Hongyang Liu, Boyang Zhang, Xuelong Li, Chengwei Liu, Chen Wang, Feng Wang, Zhenhua Cui, Deyou Chen
Summary: The geological structures of Sima coal mine in Shanxi Province were analyzed to understand how they control the distribution of coalbed methane. The study found that buried depth and overburden thickness have a linear relationship with CBM content, but there is significant variation within a small range. Faults and collapse columns affect local CBM content, but their influence is not significant on a larger scale. The hanging wall and footwall of a normal fault have different effects on CBM content. Collapse columns have different effects on CBM occurrence depending on their development height, cementation degree, and groundwater runoff conditions.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Jingxue Yan, Baoshan Jia, Baogang Liu, Jinyi Zhang
Summary: In order to understand the importance of methane and carbon dioxide adsorption mechanisms in coal for coalbed methane development, we aimed to investigate the influence of factors such as adsorption pressure, temperature, gas properties, and water content on gas adsorption behavior at the molecular level. Using molecular dynamics (MD) and Monte Carlo (GCMC) methods, we simulated and analyzed different pressure, temperature, and water content conditions using a nonsticky coal sample from Chicheng Coal Mine. Our study established a theoretical foundation for understanding the adsorption characteristics of coalbed methane in coal and provided technical support for improving coalbed methane extraction.
Article
Engineering, Geological
Xuwei Hou, Xiaozhi Zhou, Jienan Pan
Summary: The permeability and mechanical characteristics of ductile rocks surrounding coals were studied, and the optimal ratios and preparation conditions of similar materials were determined. These findings provide a foundation for large-scale simulation experiments and promote the development of coalbed methane.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Thermodynamics
Jun Li, Qiming Huang, Gang Wang, Enmao Wang, Shuang Ju, Cunli Qin
Summary: Slickwater fracturing has a significant impact on the pore structure of coal seams, resulting in a decrease in pore volume and specific surface area, as well as severe blockage of micropores by residual liquid. The development of a gel breaker suitable for slickwater can improve the flowback effect and reduce reservoir damage.
Article
Energy & Fuels
Guanwen Lu, Chongtao Wei, Jilin Wang, Ruiyan Meng, Landry Soh Tamehe
Summary: Differences in pore and surface free energy in tectonically deformed coal affect coalbed methane extraction and mine safety. Strongly deformed coal has larger pore volume and specific surface area, leading to higher contents of adsorbed and free methane.
Article
Energy & Fuels
Haichao Wang, Xinghua Shi, Jijun Tian, Jienan Pan, Liping Yao, Xinke Feng
Summary: Research on tectonically deformed coal (TDC) is important for gas outburst prevention and coalbed methane development. This study used XRD, C-13 solid-state NMR, and coal pyrolysis techniques to compare the macromolecular structural characteristics and gas generation properties between weak TDC (WTDC) and strong TDC (STDC). The results show that strong tectonic stress promotes coalification evolution in advance and has an impact on the structure and gas generation potential of coal.
Article
Geosciences, Multidisciplinary
Hewu Liu, Yu Song, Zhigang Du
Summary: In this study, a molecular dynamics simulation of the shear friction process on primary structure coal was performed. The simulation results show that coal friction is an energy transformation process, with mechanical energy leading to temperature increases and chain motion. Chain diffusion and reorientation are the main modes of chain motion during friction, with different fused aromatic chains exhibiting different orientation changes.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
Lan Hoang, Ngoc Han Tran, Michael Urynowicz, Van Giap Dong, Kim Anh To, Zaixing Huang, Lan Huong Nguyen, Thi Mai Phuong Pham, Duc Dung Nguyen, Canh Duong Do, Quoc Hung Le
Summary: This study comprehensively analyzed the hydrogeological characteristics, coalbed water characteristics, and coal sample characteristics in the Red River Basin. High concentrations of chloride and sodium in the coalbed water were found to be associated with marine or marine-transitional beds. Additionally, a correlation between microbes and chemical components in the coalbed water was established.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Hao Wu, Yanbin Yao, Dameng Liu
Summary: This study investigated the water vapor sorption behavior in different maturity coal samples and identified two types of water adsorption mechanisms: attachment to oxygen functional groups and pore filling in hydrophilic and hydrophobic pores, respectively. The differences in water adsorption characteristics were found to be influenced by pore volume and the proportion of hydrophilic pores. The results also showed that water adsorption on methane adsorption in coal was attributed to the amount and proportion of hydrophilic pores.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Dan Zhou, Caifang Wu, Yu Song, Baoan Xian, Bin Gao, Zhen Zhang, Gaofeng Liu
Summary: This paper discusses the evolution characteristic and implication of coalbed methane (CBM) desorption stages division with the tectonic deformation degree based on the CH4 isothermal adsorption/desorption experiments and desorption efficiency for the primary coal and tectonically deformed coals (TDCs). The results show that the pressure drops for the three desorption stages divided contributing to the CBM productivity increase with the tectonic deformation degree. The study also identifies the reservoir stimulation methods suitable for different TDCs reservoirs and emphasizes the need for special water drainage and depressurization management. The evolution characteristics of the three key pressures and desorption stages division with the tectonic deformation degree can estimate the reasonable flow pressure for CBM production. This study is of great significance for achieving high and stable CBM production in TDCs reservoirs.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Geosciences, Multidisciplinary
Di Gao, Huiling Guo, Bianqing Guo, Kaili Tan, Hengxing Ren
Summary: In this study, the pore structure characteristics of No. 3 coal seams in Qinshui Basin after microbial treatment were analyzed. It was found that microorganisms participated in the degradation of coal reservoirs and promoted the production of methane gas. The modification of meso-macropores was more significant, resulting in stabilized pore diameter, smoother pores, decreased specific surface area, and increased pore volume, which are beneficial for the adsorption and production of coalbed methane (CBM) after microbial treatment.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Environmental Sciences
Chengmin Wei, Chengwu Li, Qiusheng Ye, Zhenfei Li, Min Hao, Shanyang Wei
Summary: This research constructed a mathematical model to accurately predict the emission of coalbed methane and validated the model in the field. The study found that the new model had higher accuracy than the traditional model, leading to improved efficiency in controlling and utilizing coal mine gas disasters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Chengmin Wei, Chengwu Li, Qiusheng Ye, Zhenfei Li, Min Hao, Shanyang Wei
Summary: In this research, a mathematical model for predicting gas emission from coalbed methane excavation workface was constructed, and a new model with higher accuracy and conciseness was proposed and validated. The study also analyzed the sensitivity of gas emission parameters and the participation ratio of gas emission sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Anmin Wang, Jing Li, Daiyong Cao, Yingchun Wei, Liqi Ding, Meng Zhao
Summary: The study investigates the effect of tectonic stress on the nanopore structure and macromolecular structure of tectonically deformed coal (TDC). The results show that the macromolecular structures of both vitrinite and inertinite can be altered by tectonic stress. However, the impact on the pore structure is limited.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Fenglin Chen, Xiaozhuang Cui, Shoufa Lin, Jian Wang, Xueming Yang, Guangming Ren, Weihua Pang
Summary: This study presents new dataset of late Mesoproterozoic diabases in the southwestern Yangtze Block, showing tholeiitic composition, negligible crustal contamination, and likely origin from partial melting of a depleted asthenosphere mantle source. The diabases rule out interaction with subduction-related materials and display characteristics typical of within-plate basalts, indicating intense continental rifting in the region during the late Mesoproterozoic. The widespread intraplate magmatism in the Yangtze Block at 1.2-1.1 Ga suggests that it may not have been involved in the Rodinia assembly at the time.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Lijun Wang, Kexin Zhang, Shoufa Lin, Weihong He, Leiming Yin
Summary: This study investigates the amalgamation of the Yangtze Block and the West Cathaysia terrane in South China, suggesting that they were two separate microcontinents that were accreted through strike-slip movement along the JSP Fault in the early Paleozoic. The findings also propose a comparison between this model and the accretion of terranes in the North American Cordillera.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Gang Zhang, Guangtao Chen, Shenglian Ren, Can Ge, Shoufa Lin, Chuanzhong Song, Longming LI
Summary: This study examines the fault geometry, kinematics, geophysics, tectonic stress field, and tectonic evolution of the Zhouwang fault in the southern Jiangnan tectonic transition zone of the lower Yangtze region in eastern China. Field observations and geophysical data reveal the fault's composition, stages of tectonism, and distinct characteristics at different depths. The tectonic stress field analysis suggests four tectonic movements experienced by the fault, which provides important insights into the geological and tectonic evolution of the region.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Geosciences, Multidisciplinary
Xu Han, Longming Li, Shoufa Lin, Shenglian Ren, Tao Liang, Lamei Feng, Yanpeng Ge, Kejia Lu, Lei Wang
Summary: The tectonic evolution of the North Qinling Orogen is complex, and the formation of Devonian A-type granites in the northeastern North Qinling Terrane indicates they were generated in a continental rift environment, related to the opening of the Palaeo-Tethyan Ocean and the closure of the Shangdan Ocean.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Yanfei Xia, Changqing Yin, Shoufa Lin, Jian Zhang, Jiahui Qian, Shangjing Wu, Jingna Liu
Summary: Minor lenses of high-pressure mafic granulites were discovered in the Badu Complex of the East Cathaysia terrane in South China. These rocks underwent three metamorphic stages and exhibited two decompression processes. Zircon U-Pb dating suggests high-pressure metamorphism occurred at approximately 240-244 Ma.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Yan Zhao, Shoufa Lin, Peng Zhang, Xueming Yang, Yuchao Gu, Zhongwei Bi, Linlin Kou
Summary: The Paleoproterozoic syn-orogenic magmatism in the Jiao-Liao-Ji Belt of the North China Craton includes I-type monzogranite, S-type granites, and adakitic granites, which may have originated from mafic parental magma induced by slab subduction. The complex orogenic evolution model in the Late Paleoproterozoic of the JLJB involves simultaneous slab subduction and partial melting of a thickened crust around 1885 Ma.
PRECAMBRIAN RESEARCH
(2021)
Review
Geosciences, Multidisciplinary
Chao-Yang Wang, En Meng, Shoufa Lin, Yan-Guang Li
Summary: This study focuses on the petrogenesis, geochronology, and isotopic characteristics of metavolcanic rocks in the Tonghua area, shedding light on the crustal evolution history in the northeastern North China Craton during the Neoarchean. The results of zircon dating and isotopic analysis reveal the magmatic activities, metamorphic events, and regional tectonic background, providing insights into the tectonic-thermal evolution in the region. The geochemical data further indicate the rock types and suggest a long-lived continental-margin setting along the northeastern margin of the North China Craton during the late Neoarchean, distinguishing between the Northern Liaoning Block and Southern Jilin Block.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Longming Li, Shoufa Lin, Guangfu Xing, Fan Xiao, Wenjiao Xiao
Summary: An ophiolite suite has been identified in the Zhenghe-Dapu fault zone, Cathaysia block, South China, which suggests that the Cathaysia block may consist of at least two different terranes and its formation may have occurred far later than the Cambrian ca. 520 Ma.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Wenxuan Li, Changqing Yin, Shoufa Lin, Wenjing Li, Peng Gao, Jian Zhang, Jiahui Qian, Hengzhong Qiao
Summary: This study provides detailed information on the petrology, geochemistry, and isotopic composition of granites in the Khondalite Belt in North China, revealing different episodes of magmatism through Paleoproterozoic time. The findings contribute to a better understanding of the geological evolution of the region.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
Xin Lin, Shoufa Lin, Domenico Cicchella, Wensheng Yao, Hanjiang Pan, Zhizhong Cheng, Ganggang Meng
Summary: Terrane recognition and boundary identification are crucial for understanding continental tectonics. However, discrepant interpretations of terranes and boundaries are still common in South China. In this study, a large geochemical dataset was used to characterize proposed terranes and locate their boundaries. Data mining techniques were applied to extract valuable information, and the results showed distinct geochemical patterns at regional and terrane scales. The defined boundaries were supported by geophysical, Nd isotopic, and geological evidence, providing better insights into the origin and assembly of South China.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Computer Science, Interdisciplinary Applications
Yangyang Wang, Chuanzhong Song, Jiahao Li, Shoufa Lin, Zhenwei Li, Fang Yuan, Shenglian Ren
Summary: This study presents the structural deformation and zircon U-Pb geochronological results from Precambrian rocks in the eastern domain of the Jiangnan orogenic belt in South China. The findings suggest that the amalgamation of the Yangtze Block and the Cathaysia Block did not occur until 770 Ma.
EARTH SCIENCE INFORMATICS
(2022)
Article
Geosciences, Multidisciplinary
Jordy de Vries, Shoufa Lin, Cees van Staal, Chris Yakymchuk
Summary: This study conducted a detailed analysis of a metamorphic tectonite belt in northwest China, revealing a new mechanism for eclogite formation that challenges previous tectonic models. The results indicate that the metamorphic trajectory in the area went through multiple different phases, closely tied to a northward subduction process.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Editorial Material
Geosciences, Multidisciplinary
Wenjiao Xiaoa, A. M. Celal Sengor, Yucheng Chai, Shoufa Lin, Songjian Ao, Dongfang Song
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geology
Wenhua Ji, Xiaoyong Yang, Shoufa Lin
Summary: This special issue focuses on the tectonic, magmatic, and metallogenetic evolution of the Central China Orogenic Belt.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Editorial Material
Geosciences, Multidisciplinary
Wenjiao Xiao, A. M. Celal Sengor, Reimar Seltmann, Karel Schulmann, Shoufa Lin, Yildirim Dilek
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
