A review on fracturing technique with carbon dioxide phase transition

With continuously increasing urban construction, more underground projects require the breaking of rocks near sensitive areas, such as hospitals, schools, and residential areas. On one hand, since conventional blasting that uses explosives has a negative impact on the safety of the surrounding build...

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Published in工程科学学报 Vol. 43; no. 7; pp. 883 - 893
Main Authors Sheng-tao ZHOU, Xue-dong LUO, Nan JIANG, Zong-xian ZHANG, Ying-kang YAO
Format Journal Article
LanguageChinese
Published Science Press 01.07.2021
Subjects
carbon dioxide
harmful effect
load characteristics
rock breakage
rock-breaking mechanism
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Summary:With continuously increasing urban construction, more underground projects require the breaking of rocks near sensitive areas, such as hospitals, schools, and residential areas. On one hand, since conventional blasting that uses explosives has a negative impact on the safety of the surrounding buildings and brings about noise and flying rocks, the use of explosives are sometimes not allowed. On the other hand, the efficiency of mechanical rock excavation is very low, resulting in a low speed of rock excavation and high operation cost. In view of this situation, techniques that incorporate carbon dioxide phase transition fracturing have been tried in rock fragmentation in complex and sensitive environments such as those mentioned above. Furthermore, carbon dioxide phase transition fracturing is also regarded as an ideal substitute for the explosives in the field of coal permeability improvement. As an environmentally friendly rock-breaking technology, carbon dioxide phase transition fracturing has the advantag
ISSN:2095-9389
DOI:10.13374/j.issn2095-9389.2020.11.05.006