The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour
The low-permeability characteristic of sandstone-type uranium deposits has become the key geological bottleneck during the in-situ leaching mining, seriously restricting the development and utilization of uranium resources in China. At present, the blasting-enhanced permeability (BEP) and acidizing-...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023095543 |
| _version_ | 1797383996500344832 |
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| author | Qinghe Niu Mingwei Hu Jiabin He Bo Zhang Xuebin Su Lixin Zhao Jienan Pan Zhenzhi Wang Zhigang Du Yuebei Wei |
| author_facet | Qinghe Niu Mingwei Hu Jiabin He Bo Zhang Xuebin Su Lixin Zhao Jienan Pan Zhenzhi Wang Zhigang Du Yuebei Wei |
| author_sort | Qinghe Niu |
| collection | DOAJ |
| description | The low-permeability characteristic of sandstone-type uranium deposits has become the key geological bottleneck during the in-situ leaching mining, seriously restricting the development and utilization of uranium resources in China. At present, the blasting-enhanced permeability (BEP) and acidizing-enhanced permeability (AEP) are confirmed to be mainstream approaches to enhance the reservoir permeability of low-permeability sandstone-type uranium deposit (LPSUD). To clarify the synergistic effect of BEP and AEP, the acid-rock reaction and dynamic impact experiments were conducted, aiming to study the effect of chemical reactions on pore structure, dynamic mechanical properties and failure pattern of sandstone. Results show that with the increasing acid-rock reaction time, the total pore volume of samples is promoted largely and exhibits obvious chemical damage. The change of pore volume depends on the pore size, the 100–1000 nm and 1000–10000 nm pores are more susceptible to acid-rock reactions. The dynamic peak strength and the dynamic elastic modulus are decreased and the dynamic peak strain and strain rate are increased when lengthening the acid-rock reaction time, whose evolution laws can be fitted by the logistic expression, the linear expression and the exponential expression, respectively. The acid-rock reactions also have an influence on the fracture development of samples after the dynamic impact. The damaged fractures on the end faces of samples grow from the isolated short fracture, the isolated long fracture to the fracture network, and the damaged fractures on the sides of samples develop from the non-penetration fractures, penetration fractures to the multi-branch fractures. This study clarifies the physical and chemical combined damage mechanism, demonstrates the potential of reservoir stimulation by uniting the BEP and the AEP, and provides a theoretical reference for the reservoir stimulation of LPSUD. |
| first_indexed | 2024-03-08T21:29:04Z |
| format | Article |
| id | doaj.art-490f96f468b141feaf6fade3558f3d18 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T21:29:04Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-490f96f468b141feaf6fade3558f3d182023-12-21T07:33:23ZengElsevierHeliyon2405-84402023-12-01912e22346The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviourQinghe Niu0Mingwei Hu1Jiabin He2Bo Zhang3Xuebin Su4Lixin Zhao5Jienan Pan6Zhenzhi Wang7Zhigang Du8Yuebei Wei9Key Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China; Liaoning Qingchuang High Tech Construction Industrialization Consulting Co., Ltd, Shenyang, 110179, China; Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, ChinaKey Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China; Liaoning Qingchuang High Tech Construction Industrialization Consulting Co., Ltd, Shenyang, 110179, China; Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, ChinaKey Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China; Liaoning Qingchuang High Tech Construction Industrialization Consulting Co., Ltd, Shenyang, 110179, China; Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, ChinaKey Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China; Liaoning Qingchuang High Tech Construction Industrialization Consulting Co., Ltd, Shenyang, 110179, China; Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, China; Corresponding author. State Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, China.Beijing Research Institute of Chemical Engineering and Metallurgy, Beijing 101149, ChinaBeijing Research Institute of Chemical Engineering and Metallurgy, Beijing 101149, ChinaSchool of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, ChinaSchool of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, ChinaSchool of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang, Henan, 471023, ChinaKey Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China; Liaoning Qingchuang High Tech Construction Industrialization Consulting Co., Ltd, Shenyang, 110179, China; Hebei Technology and Innovation Center on Safe and Efficient Mining of Metal Mines, Shijiazhuang, 050043, ChinaThe low-permeability characteristic of sandstone-type uranium deposits has become the key geological bottleneck during the in-situ leaching mining, seriously restricting the development and utilization of uranium resources in China. At present, the blasting-enhanced permeability (BEP) and acidizing-enhanced permeability (AEP) are confirmed to be mainstream approaches to enhance the reservoir permeability of low-permeability sandstone-type uranium deposit (LPSUD). To clarify the synergistic effect of BEP and AEP, the acid-rock reaction and dynamic impact experiments were conducted, aiming to study the effect of chemical reactions on pore structure, dynamic mechanical properties and failure pattern of sandstone. Results show that with the increasing acid-rock reaction time, the total pore volume of samples is promoted largely and exhibits obvious chemical damage. The change of pore volume depends on the pore size, the 100–1000 nm and 1000–10000 nm pores are more susceptible to acid-rock reactions. The dynamic peak strength and the dynamic elastic modulus are decreased and the dynamic peak strain and strain rate are increased when lengthening the acid-rock reaction time, whose evolution laws can be fitted by the logistic expression, the linear expression and the exponential expression, respectively. The acid-rock reactions also have an influence on the fracture development of samples after the dynamic impact. The damaged fractures on the end faces of samples grow from the isolated short fracture, the isolated long fracture to the fracture network, and the damaged fractures on the sides of samples develop from the non-penetration fractures, penetration fractures to the multi-branch fractures. This study clarifies the physical and chemical combined damage mechanism, demonstrates the potential of reservoir stimulation by uniting the BEP and the AEP, and provides a theoretical reference for the reservoir stimulation of LPSUD.http://www.sciencedirect.com/science/article/pii/S2405844023095543Pore structureAcid-rock reactionHopkinson pressure bar experimentdynamic mechanical parametersFailure pattern |
| spellingShingle | Qinghe Niu Mingwei Hu Jiabin He Bo Zhang Xuebin Su Lixin Zhao Jienan Pan Zhenzhi Wang Zhigang Du Yuebei Wei The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour Heliyon Pore structure Acid-rock reaction Hopkinson pressure bar experiment dynamic mechanical parameters Failure pattern |
| title | The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour |
| title_full | The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour |
| title_fullStr | The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour |
| title_full_unstemmed | The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour |
| title_short | The chemical damage of sandstone after sulfuric acid-rock reactions with different duration times and its influence on the impact mechanical behaviour |
| title_sort | chemical damage of sandstone after sulfuric acid rock reactions with different duration times and its influence on the impact mechanical behaviour |
| topic | Pore structure Acid-rock reaction Hopkinson pressure bar experiment dynamic mechanical parameters Failure pattern |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023095543 |
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