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Keywords: extraction ratio
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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 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 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-224
... could not stand the overburden stress in some cases [4]. Backfilling can increase mine stability specifically pillar stability, as slurry applies confining pressure to the pillars [7]. Backfilling helped extraction ratio to be ARMA 15-224 Underground Disposal of Fine Coal Waste Siavash Zamiran Southern...
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
... m of interburden. As part of the mine planning effort, three-dimensional finite difference modeling was conducted to predict two-seam mining stress conditions while considering the crucial creep behavior of the host strata. Barrier columnization, time lag between bed mining, panel extraction ratio...
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
... machine learning reservoir geomechanics Upstream Oil & Gas anhydrite Artificial Intelligence extraction ratio Reservoir Characterization solid waste management geotechnical factor nuclear waste repository stability excavation sequence pillar Waste Isolation Pilot Plant room 7...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-801
...) as below :- 801 l. Dimensional factors a) Thickness of the seam excavated b) Size (specially the width) of the seam c) Depth of the seam d) Dip of the seam 2. Operational factors a) Method of working (longwall or bord-and-pillar) b) Type of goal support c ) Extraction ratio d) Presence of workings...
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-81-0335
..., extraction ratio, strat- igraphic colu m, a topo map and a mine map which shows the detailed mine layouts including location of the damaged houses. If available, interviews were held with the personnel involved in the mining opera- tion that resulted in the damage of the residential houses. Several visits...
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
... 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 which satisfy par- ticular maximum temperature...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0163
... descriptions are given for the stress con- centrations developed around the cavern periphery for both a single cavern and an array of three caverns. Results are compiled to illustrate stability and sup- port requirements for different cavern height-to-width ratios, in situ stress ratios, and extraction ratios...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0265
... according to the desired extraction ratio. ( top of the block a plate with 16 square holes was placed and enclosures were made around the plate. The plate was connected to a micrometer firmly placed on the bottom of the box. As the micrometer is turned the plate moves vertically. The vertical movement...
Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0566
... in rock mechanics. The parametric study presented in this paper is the excavation of an underground cavern for which seven parame- ters 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...
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
... Js repeated until the bottom of the ore horizon is reached, leaving 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...
Proceedings Papers

Paper presented at the The 14th U.S. Symposium on Rock Mechanics (USRMS), June 11–14, 1972
Paper Number: ARMA-72-0263
... metals & mining Reservoir Characterization Upstream Oil & 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...
Proceedings Papers

Paper presented at the The 6th U.S Symposium on Rock Mechanics (USRMS), October 28–30, 1964
Paper Number: ARMA-64-501
... Measured by USBM c (Stress Relief Method) 1600 1300 1300 aBased on actual measurement of room and pillar areas. bBased on nominal extraction ratio in the whole panel of rooms. CReport APRL E 40.1 Stress Determinations and Borehole Deformation Studies by L. Ober% USBM, Applied Physics Research Laboratory...

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