1-17 of 17
Keywords: extraction ratio
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1158
... conditions for different depths and extraction ratios. Design charts were then generated to provide guidance on pillar geometry based on expected demand. Mine-wide models were developed to predict the level of vertical stress and horizontal shear stress for pillars in the different ore-bearing beds...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-635
... factors. The calibrated numerical models are then used to optimize the design of ground support. Upstream Oil & Gas extraction ratio bedding plane joint metals & mining Simulation geometry mining horizon Reservoir Characterization numerical assessment material property equivalent...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-224
... not work well for all types of mines. For example, in the Donovan study [4] this method has been recommended only for thin-seam coal mines. university safety factor us government floor stability extraction ratio pillar stability coal waste moisture content slurry strength reservoir...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7199
... panels. Reservoir Characterization Upstream Oil & Gas tributary area overburden stability analysis structural geology stress-strain response metals & mining room-and-pillar panel geometry panel-scale model ground-reaction curve extraction ratio panel pillar pillar-scale model...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1539
... strata. Barrier columnization, time lag between bed mining, pgnel extraction ratio, and barrier width were determined to be the most significant issues influencing global stability. Implications for two-seam ine design are discussed in the paper. 1 INTRODUCTION The OCI Big Island Mine is one of four...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-1043
... are (1) entry geometry, (2) extraction ratio within panels and in-panel pillar behavior, (3) sequence of excavation and load transfer between adjacent panels, (4) support density, and (5) age of excavations. INTRODUCTION The Waste Isolation Pilot Plant (WIPP) site is located about 40 km east...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-801
... working seam Maximum Subsidence subsidence profile central mining research station Longwall metals & mining overburden extraction ratio descrepancy goal support hard rock layer Rock Mechanics as a Multtdtsctplmary Sctence, Roegiers (ed ) ¸ 1991 Balkerna, Rotterdam ISBN 90 6191 194 X...
Proceedings Papers

Paper presented at the The 28th U.S. Symposium on Rock Mechanics (USRMS), June 29–July 1, 1987
Paper Number: ARMA-87-0883
... (longitudinal) stress. Closure measurements and pressure readings have been taken periodically by mine engineering staff. In 1984 and early 1985, readings were taken sporadically; at one point, several months passed between readings. metals & mining extraction ratio reservoir geomechanics...
Proceedings Papers

Paper presented at the The 22nd U.S. Symposium on Rock Mechanics (USRMS), June 29–July 2, 1981
Paper Number: ARMA-81-0156
... is given to the characteristic transient thermal response of the RW and IF containers, emplaced backfill and the host rock mass. The influence of backfill and rock thermal conductivity, vault extraction ratio and container arrangement within a room is presented to define the combinations of these variables...
Proceedings Papers

Paper presented at the The 22nd U.S. Symposium on Rock Mechanics (USRMS), June 29–July 2, 1981
Paper Number: ARMA-81-0335
... for study. For each case, several visits were made to the mine for collecting the following information: mining height, depth of overburden, extraction ratio, stratigraphic column, a topo map and a mine map which shows the detailed mine layouts including location of the damaged houses. If available...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0265
... metals & mining extraction ratio fringe Model study longwall mining model Artificial Intelligence sand model subsidence model subsidence factor gelatin model subsidence area holographic interferometry model surface gelatin means MODEL S2IJDIES OF SUBSIDENCE OVER ROOM-AND-PILLAR COAL...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0566
... for which seven parameters were studied. The parameters considered were: (I) Young•s Modulus (E) (2) Poisson•s Ratio (v) (3) Lateral Earth Pressure Coefficient (Ko) (4) Extraction Ratio (5) Angle of Internal Friction (•) (Intact and Jointed) (6) Cohesion (So) (Intact and Jointed) (7) Joint Angle (4...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0163
... a single cavern and an array of three caverns. Results are compiled to illustrate stability and support requirements for different cavern height-to-width ratios, in situ stress ratios, and extraction ratios. The paper also describes a finite element heat transfer analysis of a water compensated CAES...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0334
... ABSTRACT : Even though pillars were 88 feet square and only 8 feet high, with entries 32 feet wide to give an extraction ratio of only 46%, the standard room-and-pillar layout at depths in excess of 2,500 feet resulted in undesirable roof conditions. A plan was conceived for using small...
Proceedings Papers

Paper presented at the The 17th U.S. Symposium on Rock Mechanics (USRMS), August 25–27, 1976
Paper Number: ARMA-76-0219
... rooms up to 56 feet in height (17.1 meters). The extraction ratio of the mine is approximately 78 to 80 percent. Due to many different factors, the pillars at Fletcher experienced deterioration in the form of continual surface spalling to splitting. Convergence of the mine, as measured by numerous rod...
Proceedings Papers

Paper presented at the The 14th U.S. Symposium on Rock Mechanics (USRMS), June 11–14, 1972
Paper Number: ARMA-72-0263
... & Gas ground surface extraction ratio structural geology amd plant site Rock mechanics subsidence distortion reservoir geomechanics strength hillman vein operation procedure pillar vein surface distortion safety factor strata coal vein finite element analysis AN EVALUATION OF MINE...
Proceedings Papers

Paper presented at the The 6th U.S Symposium on Rock Mechanics (USRMS), October 28–30, 1964
Paper Number: ARMA-64-501
... the other localities. waste management horizontal closure rate convergence pillar stress dimension parting separation convergence measurement vertical convergence rate US government extraction ratio laboratory pillar horizontal expansion creep rate equation closure rate Serata...

Product(s) added to cart

Close Modal