2020
DOI: 10.2298/tsci2006979s
|View full text |Cite
|
Sign up to set email alerts
|

Effect of low temperature damage on tensile strength of coal under the liquid nitrogen freezing

Abstract: To explore the influence of low temperature damage on the tensile strength of coal under the liquid nitrogen freezing, the Brazilian splitting tests are conducted on the bedding coal in this paper. The tensile strength, macro fracture surface morphology, failure path and micro-structures of the coal samples before and after liquid nitrogen treatment were analyzed systematically. The results show that the tensile strength of coal after liquid nitrogen freezing is reduced, the macro fracture su… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2

Citation Types

0
1
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
6

Relationship

0
6

Authors

Journals

citations
Cited by 7 publications
(2 citation statements)
references
References 15 publications
0
1
0
Order By: Relevance
“…Stimulation processes are needed in coal beds, tight sandstones, and shale to accelerate recovery since permeability and porosity of the reservoir formation are some of the main factors that affect the rate of oil and gas recovery [9]. Thus, developing technologies in the oil and gas industry is needed to increase the production and recovery factor to cover human energy needs [10][11][12][13]. Hydraulic fracturing is widely recognized as the primary technique for enhancing gas production rates, particularly in regions where water resources are abundant.…”
Section: Introductionmentioning
confidence: 99%
“…Stimulation processes are needed in coal beds, tight sandstones, and shale to accelerate recovery since permeability and porosity of the reservoir formation are some of the main factors that affect the rate of oil and gas recovery [9]. Thus, developing technologies in the oil and gas industry is needed to increase the production and recovery factor to cover human energy needs [10][11][12][13]. Hydraulic fracturing is widely recognized as the primary technique for enhancing gas production rates, particularly in regions where water resources are abundant.…”
Section: Introductionmentioning
confidence: 99%
“…In single injection, injection time is varied to fracture coal rock. In cyclic injection, the number of freeze–thaw cycles is varied; coal rock is weakened as it is repeatedly frozen and thawed. Coal rock pore structure is clearly changed by cyclic injection, while the effect of single injection is less clear. As a coal rock fracturing fluid, LN 2 produces no waste or water pollution; the fracturing process is more stable and has few unintended consequences. As a new means to fracture coal rock, LN 2 fracturing can increase coal rock permeability and enhance unconventional oil and gas production while avoiding the shortcomings of traditional fracturing. …”
Section: Introductionmentioning
confidence: 99%