{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T13:24:28Z","timestamp":1786973068347,"version":"build-2736575974"},"reference-count":45,"publisher":"American Chemical Society (ACS)","issue":"25","license":[{"start":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T00:00:00Z","timestamp":1686528000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52074108"],"award-info":[{"award-number":["52074108"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52274189"],"award-info":[{"award-number":["52274189"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003488","name":"Henan Polytechnic University","doi-asserted-by":"publisher","award":["AQ20230206"],"award-info":[{"award-number":["AQ20230206"]}],"id":[{"id":"10.13039\/501100003488","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003488","name":"Henan Polytechnic University","doi-asserted-by":"publisher","award":["AQ20230762"],"award-info":[{"award-number":["AQ20230762"]}],"id":[{"id":"10.13039\/501100003488","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004773","name":"Henan University","doi-asserted-by":"publisher","award":["22HASTIT012"],"award-info":[{"award-number":["22HASTIT012"]}],"id":[{"id":"10.13039\/501100004773","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100017700","name":"Henan Provincial Science and Technology Research Project","doi-asserted-by":"publisher","award":["212102310007"],"award-info":[{"award-number":["212102310007"]}],"id":[{"id":"10.13039\/501100017700","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/na","name":"Key Scientific Research Projects of Henan Colleges and Universities","doi-asserted-by":"publisher","award":["22A620001"],"award-info":[{"award-number":["22A620001"]}],"id":[{"id":"10.13039\/na","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,6,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>In order to understand the influence of underground coal fires on coal fractures and pores, mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) are combined to study the development of coal pore and fracture under high-temperature treatment and calculate the fractal dimension to analyze the relationship between the development of coal pore and fracture and the fractal dimension. The results show that the volume of pores and fractures of the coal sample (C200) treated at 200 \u00b0C (0.1715 mL\/g) is greater than that of the coal sample (C400) treated at 400 \u00b0C (0.1209 mL\/g), and both are greater than the original coal sample (RC) (0.1135 mL\/g). The volume increase is mainly due to mesopores and macropores, and the proportions of mesopores and macropores in C200 were 70.15 and 59.97% in C400. The MIP fractal dimension shows a decreasing trend with the increase of temperature, and the connectivity of coal samples improved with the increase of temperature. The changes in volume and three-dimensional fractal dimension of C200 and C400 showed the opposite trend and are related to the different stress of coal matrix at different temperatures. The experimental SEM images confirm that the connectivity of coal fractures and pores improves with the increase of temperature. Based on the SEM experiment, the larger the fractal dimension, the more complex the surface is. The SEM surface fractal dimensions indicate that the surface fractal dimension of C200 is the smallest and that of C400 is the largest, which is consistent with the observations made by SEM. The combination of the two fractal dimensions is used to characterize the self-similarity of coal using the fractal dimension difference. When the temperature increased to 200 \u00b0C, the unordered expansion of the coal sample resulted in the largest fractal dimension difference and the lowest self-similarity. When heated to 400 \u00b0C, the fractal dimension difference of the coal sample is the smallest, and the microstructure of coal shows a regular groove-like development.<\/jats:p>","DOI":"10.1021\/acsomega.3c02480","type":"journal-article","created":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T06:14:45Z","timestamp":1686550485000},"page":"23098-23111","source":"Crossref","is-referenced-by-count":11,"title":["Study of the Microstructure\nof Coal at Different Temperatures\nand Quantitative Fractal Characterization"],"prefix":"10.1021","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5484-4952","authenticated-orcid":true,"given":"Yong-liang","family":"Xu","sequence":"first","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-5959-6951","authenticated-orcid":true,"given":"Xing-wang","family":"Huo","sequence":"additional","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7862-5703","authenticated-orcid":true,"given":"Lan-yun","family":"Wang","sequence":"additional","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang-jun","family":"Gong","sequence":"additional","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ze-cheng","family":"Lv","sequence":"additional","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tian","family":"Zhao","sequence":"additional","affiliation":[{"name":"Henan Polytechnic University (HPU) , , ,","place":["Jiaozuo, China, 454003"]},{"name":"State Key Laboratory Cultivation Base for Gas Geology & Gas Control of HPU , ,","place":["Jiaozuo, China, 454003"]},{"name":"Collaborative Innovation Center for Coal Safety Production & High-Efficient-Clean Utilization , ,","place":["Jiaozuo, China, 454003"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2023,6,12]]},"reference":[{"key":"2026081708271270300_cit1","doi-asserted-by":"publisher","first-page":"1333","DOI":"10.1016\/S0016-2361(99)00055-1","article-title":"The effect of pore structure and gas pressure upon\nthe transport properties of coal: a laboratory and modeling study.\n1. 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China\nCoal Soc."},{"key":"2026081708271270300_cit44","doi-asserted-by":"publisher","DOI":"10.1155\/2022\/7848388","article-title":"Coal Permeability\nVariation during the Heating Process considering Thermal Expansion\nand Desorption Shrinkage","volume":"2022","author":"Su","year":"2022","journal-title":"Adsorpt. Sci. 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