Study on Physicochemical Properties and Rock-Cracking Mechanism of High-Energy Expansion Agent

Yansong Zhang, Li Cai, Jing Shi and Xiangrui Wei ()
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Yansong Zhang: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Li Cai: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Jing Shi: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Xiangrui Wei: College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Energies, 2022, vol. 15, issue 19, 1-17

Abstract: Aiming at the shortcomings of the current rock-breaking technology, a new type of high-energy expansion agent for energetic materials based on combustion-to-detonation was developed. By characterizing the basic physical and chemical properties of the high-energy expansion agent (HEEA) such as morphology, particle size distribution, and pyrolysis characteristics, the work performance of different types of high-energy expansion agents was analyzed in combination with the energy characteristics. The results showed that the relationship between the expansion work done by the gas to the outside world was W HEEA- I > W HEEA- II > W HEEA- III under the same quality of HEEA combustion. The damage effect of high-temperature and high-pressure gas cracking specimens generated by deflagration of HEEA was obvious, having the rule that the disturbance damage of rock caused by low heat and high gas specific volume was smaller, and the damage degree of rock caused by high heat and low gas specific volume was larger. The mechanism of HEEA combustion and detonation in confined space is revealed, which provides a theoretical basis for the application of HEEA-cracked rock.

Keywords: high-energy expansion agent; safety; combustion detonation; rock technology (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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