干旱区生态环境知识资源中心(Arid): A Measurement System for Systematic Hydrological Characterization of Unsaturated Fractured Welded Tuff in a Mined Underground Tunnel

Arid

DOI	10.2172/805440
来源ID	OSTI_ID: 805440
	A Measurement System for Systematic Hydrological Characterization of Unsaturated Fractured Welded Tuff in a Mined Underground Tunnel
	R. J. Cook; R. Salve; B.M. Freifeld; Y.W. Tsang
英文摘要	A field investigation of unsaturated flow through a lithophysal unit of fractured welded tuff containing lithophysal cavities has been initiated. To characterize flow in this spatially heterogeneous medium, a systematic approach has been developed to perform tests in boreholes drilled at regular intervals in an underground tunnel (drift). In this paper, we describe the test equipment system that has been built for this purpose. Since the field-scale measurements, of liquid flow in the unsaturated, fractured rocks, require continuous testing for periods of days to weeks, the control of test equipment has been fully automated, allowing operation with no human presence at the field site. Preliminary results from the first set of tests are described. These tests give insight into the role of the matrix (perhaps also lithophysal cavities) as potential storage during the initial transient flow prior to the breakthrough of water at the drift crown, as well as the role of connected fractures that provide the subsequent quasi-steady flow. These tests also reveal the impact of evaporation on seepage into the drift.
出版年	2001
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	58 GEOSCIENCES ; WELL LOGGING EQUIPMENT ; DESIGN ; TUFF ; FRACTURED RESERVOIRS ; HYDROLOGY ; RESERVOIR FLUIDS ; FLUID FLOW ; BOREHOLES ; PERFORMANCE TESTING
URL	http://www.osti.gov/scitech/servlets/purl/805440
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/268297
推荐引用方式 GB/T 7714	R. J. Cook,R. Salve,B.M. Freifeld,et al. A Measurement System for Systematic Hydrological Characterization of Unsaturated Fractured Welded Tuff in a Mined Underground Tunnel,2001.