"Prediction of groundwater influx into mine openings is one of the more important pre-development problems encountered in mining. A satisfactory method of estimation would provide the information necessary for a mining company to dewater prior to shaft sinking, pre-grout the shaft area, or plan pumping schemes to handle the expected flow.
A standardized field method of estimating groundwater supply from pumping test data was developed by O. V. Theis and others. In the present research problem, the estimation procedure has been simplified by the use of nomograms. Certain modifications in the estimate must be made when a pumping well is replaced by a large diameter opening, such as a vertical mine shaft. Due to large surface area available for influx, a shaft diameter factor has been developed to account for the increased flow. During shaft sinking, influx is less than calculated by the Theis equations due to partial penetration of the water bearing strata; therefore, a correction factor for partial penetration is introduced. Finally, it is necessary to pump water from the shaft bottom at a rate equal to or greater than the rate of influx, in order that shaft sinking may proceed without interruption. An estimate is made of the amount of dewatering caused by pumping.
When pumping test data are analyzed and the results modified by correction factors, an estimate of influx is obtained which is close to that actually encountered during sinking"--Abstract, page vi.
Vaughn, George E., Jr., 1925-1997
Christiansen, Carl R., 1921-1997
Maxwell, James C.
Proctor, Paul Dean, 1918-1999
Mining and Nuclear Engineering
M.S. in Mining Engineering
United States. Bureau of Mines
Missouri School of Mines and Metallurgy
vi, 74 pages
© 1961 Morris T. Worley, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Groundwater flow -- Measurement -- Estimates
Groundwater -- Mathematical models
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Worley, Morris T., "A method of estimating groundwater influx into a vertical mine shaft" (1961). Masters Theses. 4175.