Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests
In order to study the effect of cracking on the pore microstructure of coal rock, low-temperature nitrogen adsorption meth-od and mercury injection method were used to study the pore morphology and pore size distribution of coal samples before and after cracking, and then the fractal dimension of po...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Safety in Coal Mines
2024-11-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20222157 |
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| author | Siliang CHEN Zebiao JIANG Xiping QUAN Xifa YANG Qiaoshun MO |
| author_facet | Siliang CHEN Zebiao JIANG Xiping QUAN Xifa YANG Qiaoshun MO |
| author_sort | Siliang CHEN |
| collection | DOAJ |
| description | In order to study the effect of cracking on the pore microstructure of coal rock, low-temperature nitrogen adsorption meth-od and mercury injection method were used to study the pore morphology and pore size distribution of coal samples before and after cracking, and then the fractal dimension of pores in different ranges was calculated based on the data of low-temperature nitrogen and mercury injection combined with the fractal theory. The results show that the pore volume of coal samples increases after cracking. The large pore volume of cracked coal is 1.4−2.2 times that of raw coal, and the micropore volume is 3.7−8.2 times that of raw coal. The fractal dimension of raw coal’s seepage pore and adsorption pore is greater than that of cracking coal at pressure less than 13.8 MPa and low pressure zone, and the fractal dimension of raw coal’s diffusion pore is smaller than that of cracking coal at pressure more than 13.8 MPa but less than 137.9 MPa and high pressure zone. |
| format | Article |
| id | doaj-art-05c321e6f0a34814bcca6a512d3d3bb1 |
| institution | OA Journals |
| issn | 1003-496X |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-05c321e6f0a34814bcca6a512d3d3bb12025-08-20T02:13:56ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2024-11-015511849110.13347/j.cnki.mkaq.20222157MKAQ20222157Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption testsSiliang CHEN0Zebiao JIANG1Xiping QUAN2Xifa YANG3Qiaoshun MO4School of Mining, Guizhou University, Guiyang 550025, ChinaSchool of Mining, Guizhou University, Guiyang 550025, ChinaSchool of Mining, Guizhou University, Guiyang 550025, ChinaSchool of Mining, Guizhou University, Guiyang 550025, ChinaSchool of Mining, Guizhou University, Guiyang 550025, ChinaIn order to study the effect of cracking on the pore microstructure of coal rock, low-temperature nitrogen adsorption meth-od and mercury injection method were used to study the pore morphology and pore size distribution of coal samples before and after cracking, and then the fractal dimension of pores in different ranges was calculated based on the data of low-temperature nitrogen and mercury injection combined with the fractal theory. The results show that the pore volume of coal samples increases after cracking. The large pore volume of cracked coal is 1.4−2.2 times that of raw coal, and the micropore volume is 3.7−8.2 times that of raw coal. The fractal dimension of raw coal’s seepage pore and adsorption pore is greater than that of cracking coal at pressure less than 13.8 MPa and low pressure zone, and the fractal dimension of raw coal’s diffusion pore is smaller than that of cracking coal at pressure more than 13.8 MPa but less than 137.9 MPa and high pressure zone.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20222157co2 fracturingmercury compressionlow temperature nitrogen adsorptionpore characteristicsfractal characteristics |
| spellingShingle | Siliang CHEN Zebiao JIANG Xiping QUAN Xifa YANG Qiaoshun MO Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests Meikuang Anquan co2 fracturing mercury compression low temperature nitrogen adsorption pore characteristics fractal characteristics |
| title | Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| title_full | Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| title_fullStr | Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| title_full_unstemmed | Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| title_short | Study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| title_sort | study on pore structure and fractal characteristics of fractured coal based on mercury injection and low temperature nitrogen adsorption tests |
| topic | co2 fracturing mercury compression low temperature nitrogen adsorption pore characteristics fractal characteristics |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20222157 |
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