Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China

doi:10.1155/2020/8810648

	Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China
	Luo, Junhui 4,5; Wu, Yong 4; Mi, Decai 4; Ye, Qiongyao 4; Huang, Haifeng 2; Chang, Zhenchao 2; Chen, Qinglin 2; Zhang, Tao 1; Sun, Guanhua 7; Wang, Xueheng 6
刊名	ADVANCES IN CIVIL ENGINEERING
	2020-08-30
卷号	2020 页码:15
ISSN号	1687-8086
DOI	10.1155/2020/8810648
英文摘要	Carbonaceous rock is a special soft rock containing TOC organic carbon 6%similar to 40%. In order to reveal the influence of engineering characteristics of carbonaceous rock on the engineering construction, firstly the stratigraphic distribution of carbonaceous Rocks in Guangxi is investigated, and the genetic mechanism and tectonic environment of carbonaceous rocks are discussed. Secondly, the influence of pore microstructure on the disintegration characteristics of carbonaceous rocks is analyzed. The role of geochemical characteristics of carbonaceous rocks (mineral composition, TOC total organic matter content, and type) on engineering properties is revealed. Finally, combined with the distribution, structure, microstructure, and microscopic characteristics of the previous studies, the disintegration mechanism of carbonaceous rocks in water swelling and heat dehydration is discussed. The results are as follows. (1) Carbonaceous rocks in Guangxi are mainly distributed in Devonian, Carboniferous, and Cambrian systems. It is mainly formed in anoxic and reductive deep water basins, slopes, and relatively confined coastal lagoons and swamps. The carbonaceous rocks in the Devonian Luofu formation are most typical. (2) The pores of carbonaceous rocks are divided into mineral pores, organic matter pores, and microfracture, which are mainly mineral pores. The more developed pores in mineral pores are intragranular dissolved pores. Secondly, mineral intergranular pores and a small amount of intergranular dissolution pores and less inner pores. Organic matter porosity increases with the increase of shale organic carbon content and maturity, but the shale porosity and adsorption capacity decrease when shale maturity reaches more than 2.4%. (3) Clay minerals in carbonaceous shale mainly consist of illite and illite/montmorillonite layer, which have water swelling and heat dehydration. The total average value of TOC (total organic matter content) is more than 1%, which belongs to carbonaceous rocks of medium high grade hydrocarbon source rocks. Organic matter is mainly dominated by type I and II1-II(2)type with large hydrocarbon generating potential, which is prone to oxidation-reduction reaction and cause rock disintegration.
资助项目	Science and Technology Project of Guangxi[GuikeAC16380119] ; Science and Technology Project of Guangxi[AD19110124]
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000572083000007
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24816]
专题	中科院武汉岩土力学所
通讯作者	Luo, Junhui
作者单位	1.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China 2.Guangxi Beitou Transportat Maintenance Technol Gr, Nanning, Peoples R China 3.Guangxi Rd & Bridge Engn Grp Co Ltd, Nanning 530200, Guangxi, Peoples R China 4.Guangxi Commun Design Grp Co Ltd, Nanning, Peoples R China 5.Guangxi Xinfazhan Commun Grp Co Ltd, Nanning 530029, Guangxi, Peoples R China 6.Guangxi Inst Geol Survey, Nanning 530023, Guangxi, Peoples R China 7.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Luo, Junhui,Wu, Yong,Mi, Decai,et al. Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China[J]. ADVANCES IN CIVIL ENGINEERING,2020,2020:15.
APA	Luo, Junhui.,Wu, Yong.,Mi, Decai.,Ye, Qiongyao.,Huang, Haifeng.,...&Liu, Xianlin.(2020).Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China.ADVANCES IN CIVIL ENGINEERING,2020,15.
MLA	Luo, Junhui,et al."Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China".ADVANCES IN CIVIL ENGINEERING 2020(2020):15.