Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method

doi:10.1016/j.compgeo.2021.104445

	Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method
	Wang, Ben 4,5; Li, Haibo 4,5; Shao, Zhushan 3; Chen, Shihai 2; Li, Xiaofeng 1
刊名	COMPUTERS AND GEOTECHNICS
	2021-12-01
卷号	140 页码:17
关键词	High-pressure gas blasting Hybrid continuum-discontinuum method Rock fracturing Fragmentation Blast
ISSN号	0266-352X
DOI	10.1016/j.compgeo.2021.104445
英文摘要	To study the rock-breaking mechanism resulting from high-pressure gas blasting, a hybrid continuumdiscontinuum method considering the actual breakage of rocks was presented in this study. The mechanical parameters were calibrated against the uniaxial compression test and Brazilian disc test, and the capabilities of simulating blast-induced fractures were verified by laboratory tests. After that, the differences in rock-breaking mechanism between explosive blasting and high-pressure gas blasting were compared from the perspectives of peak pressure and loading rate. The results indicated that the crack patterns, fracture mode and vibration attenuation induced by high-pressure gas blasting were significantly different from that of explosive blasting: (a) no crushing zone and fewer radial cracks were formed in high-pressure gas blasting and the spalling cracks were absent near the free face in high-pressure gas blasting; (b) the difference of rock fracture mode in high-pressure gas blasting and explosive blasting indicated that the tensile fracturing was the dominant fracture mode in high pressure gas blasting which is different from the catastrophic fragments due to compressive-sheared fracturing surrounding the borehole in explosive blasting; (c) the intensity and attenuation factors of peak particle velocity both increased with the increase of peak pressure or loading rate, which indicated that the peak particle velocity induced by explosive blasting results in more intense and faster attenuated vibration disasters than that of highpressure gas blasting.
资助项目	National Key R&D Program of China[2020YFA0711802] ; National Natural Science Foundation of China (NSFC)[51779248]
WOS研究方向	Computer Science ; Engineering ; Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000703522000002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28534]
专题	中科院武汉岩土力学所
通讯作者	Li, Xiaofeng
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong 999077, Peoples R China 2.Huaqiao Univ, Xiamen 361021, Peoples R China 3.Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ben,Li, Haibo,Shao, Zhushan,et al. Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method[J]. COMPUTERS AND GEOTECHNICS,2021,140:17.
APA	Wang, Ben,Li, Haibo,Shao, Zhushan,Chen, Shihai,&Li, Xiaofeng.(2021).Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method.COMPUTERS AND GEOTECHNICS,140,17.
MLA	Wang, Ben,et al."Investigating the mechanism of rock fracturing induced by high-pressure gas blasting with a hybrid continuum-discontinuum method".COMPUTERS AND GEOTECHNICS 140(2021):17.