Hydrochemistry, multidimensional statistics, and rock mechanics investigations for Sanshandao Gold Mine, China

doi:10.1007/s12517-017-2841-3

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Hydrochemistry, multidimensional statistics, and rock mechanics investigations for Sanshandao Gold Mine, China
	Gu, Hongyu; Ma, Fengshan; Guo, Jie; Li, Kepeng; Lu, Rong
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2017-02-01
卷号	10 期号:3
关键词	Water Bursting Hydrochemistry Pca Rock Mechanics Water Sources Mixing Ratios Flow Paths Sanshandao Gold Mine
ISSN号	1866-7511
DOI	10.1007/s12517-017-2841-3
文献子类	Article
英文摘要	Prediction of bursting water in a submarine mine (Sanshandao Gold Mine) is very important. The aim of this study was to understand the water sources, mixing ratios, and flow paths in a mining region by using hydrochemistry, principal component analysis (PCA), and rock mechanics. Field observations reveal that there are unusual geothermal gradients and complicated geological conditions. Samples collected from the surface and every depth of the tunnel were analyzed for various ions and isotopes (O-18 and D). PCA was used to identify the most likely water sources on the foundation of hydrochemistry and a conceptual model. Four kinds of water sources were identified: (1) water mixture of surface freshwater and seawater, (2) brine derived from a deep closed environment, (3) thermal brine derived from the northwestern fault (F3), and (4) Quaternary water. The water sources were variable with time at a sampling site. The combination of water sources in a specific sampling campaign can be decided by the positive scores on principal components (PCs). The PCA results indicate that the first and the fourth kind of water source appear in the deep tunnel with the continual mining activity. Mixing ratio calculations for each sampling campaign show that the first and the fourth kind of water source constitute a small proportion of the total water. The main water sources are the second and third kinds of water. Finally, water flow paths were determined based on the PCA, and rock mechanics is used to explain the change in the water flow paths after excavation. The results show the following: (1) There are several strong water diversion zones that distribute at a certain spacing interval on the large scale and (2) "zonal disintegration" is also found in the tunnel. The fractured zone and the non-fractured zone appear in turn around the tunnel. The rock mass in these two zones represents the tensile and compressive properties, respectively. Thus, volumes of water and permeability of joints and fractures in these two zones are great different.
WOS关键词	HYDRAULIC CONDUCTIVITY ; EXCAVATION RESPONSE ; WATER INTERACTIONS ; TUNNEL EXCAVATION ; END-MEMBERS ; GROUNDWATER ; SURFACE ; RIVER ; GEOCHEMISTRY ; AUSTRALIA
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000394012200013
资助机构	National Natural Science Foundation of China(41372323 ; 41172271) ; National Natural Science Foundation of China(41372323 ; 41172271) ; National Natural Science Foundation of China(41372323 ; 41172271) ; National Natural Science Foundation of China(41372323 ; 41172271)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53060]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Gu, Hongyu
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Gu, Hongyu,Ma, Fengshan,Guo, Jie,et al. Hydrochemistry, multidimensional statistics, and rock mechanics investigations for Sanshandao Gold Mine, China[J]. ARABIAN JOURNAL OF GEOSCIENCES,2017,10(3).
APA	Gu, Hongyu,Ma, Fengshan,Guo, Jie,Li, Kepeng,&Lu, Rong.(2017).Hydrochemistry, multidimensional statistics, and rock mechanics investigations for Sanshandao Gold Mine, China.ARABIAN JOURNAL OF GEOSCIENCES,10(3).
MLA	Gu, Hongyu,et al."Hydrochemistry, multidimensional statistics, and rock mechanics investigations for Sanshandao Gold Mine, China".ARABIAN JOURNAL OF GEOSCIENCES 10.3(2017).