气候变化领域集成服务门户(CCPortal): The Complicated Link Between Material Properties and Microfracture Density for an Underground Explosion in Granite

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DOI	10.1029/2020JB019894
	The Complicated Link Between Material Properties and Microfracture Density for an Underground Explosion in Granite
	Swanson E.; Wilson J.; Broome S.; Sussman A.
发表日期	2020
ISSN	21699313
卷号	125 期号:11
英文摘要	Geophysical techniques are often implemented as quick and inexpensive ways to locate and characterize fractures in the subsurface, which is important for a number of geoscience fields. Seismic velocities are the most widely used proxies for identification of fractures, but the correlation is not always well defined. Here we present material property data: unconfined compressive strength, bulk density (ρ), Young's modulus (E), Poisson's ratio (ν), P wave velocity (Vp), and S wave velocity (Vs), in conjunction with microfracture densities measured on samples of granite collected before and after underground chemical explosions. Results indicate the relationship between fractures and material properties is complex, even in this single-lithology environment. We interpret that this complexity arises from varying fracture mechanisms (e.g., dilation-inducing fractures vs. compression-inducing fractures) in different parts of the core, due to differences in stress conditions. Additional complexity may result from chemical interactions between the fresh fractures and the fluids in the area. Water content appears to have a significant, if not dominant, role in the unconfined compressive strength of the samples. We suggest caution when using elastic property measurements as a proxy for fracturing in areas of explosion-induced damage, or in other areas where a variety of mechanisms induce fracturing. ©2020. The Authors.
英文关键词	elastic properties; granite; material properties; microfractures
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187506
作者单位	Los Alamos National Laboratory, Los Alamos, NM, United States; Sandia National Laboratories, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Swanson E.,Wilson J.,Broome S.,et al. The Complicated Link Between Material Properties and Microfracture Density for an Underground Explosion in Granite[J],2020,125(11).
APA	Swanson E.,Wilson J.,Broome S.,&Sussman A..(2020).The Complicated Link Between Material Properties and Microfracture Density for an Underground Explosion in Granite.Journal of Geophysical Research: Solid Earth,125(11).
MLA	Swanson E.,et al."The Complicated Link Between Material Properties and Microfracture Density for an Underground Explosion in Granite".Journal of Geophysical Research: Solid Earth 125.11(2020).