... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... 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...

... (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...

..., 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...

... 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...

... 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...

... 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...

... Wellbore Design cohesion internal friction Reservoir Characterization compute rock mechanics parametr study excavation reservoir geomechanics extraction ratio parametric study extreme value Upstream Oil & Gas experiment critical parameter joint angle interaction numerical...

.... 779.&1 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- ap -pillar layout at depths in excess of 2,500 feet resulted in undesirable roof conditions. A plan was conceived for using small pillars...

... deterioration Mortar casing and cementing strength extraction ratio diameter mining research st pillar ground control pillar alan weakly ABSTRACT n The purpose of this paper is to present a viable method of reinforcing rock pillars by utilizing fully grouted reinforcing steel and a cement...

... 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...

... 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...