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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0029
... formula MPa empirical value mechanics relative error Drilling excess pore pressure foundation Modeling & Simulation criterion pressure coefficient prediction model formation fracture pressure ARMA 29 Control number of paper A prediction model for fracture pressure in shallow stratum of...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0332
... fracturing stages. The 3D fracability indexes can be calculated and optimized. shale gas hydraulic fracturing complex reservoir Upstream Oil & Gas fracture toughness Reservoir Characterization structural geology strength experiment formula brittleness index natural fracture evaluation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1918
..., defined by (Equation) where summation over repeated indices is assumed here and in the following. The tensorial B in principle relates all stress components to the induced pore pressure. reservoir geomechanics formula implication transverse isotropy Reservoir Characterization elastic...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-344
..., formation pressure, wellbore pressure and tubing length. Artificial Intelligence Engineering different condition perforation condition Upstream Oil & Gas Modeling & Simulation formula initial pressure peak pressure perforation interface Completion Installation and Operations...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0942
... reservoir behavior. Geomechanical properties were calculated using existing correlations and relation. Those properties included the Young’s modulus, Poisson’s ratio, tensile strength, UCS, and pore pressure. Upstream Oil & Gas well logging correlation calculation log analysis formula...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-1017
... for Rock Mechanics (ISRM). In contrast to the previously published linear and exponential relations, our empirical relation exhibits dimensional unity between the two sides of the empirical formula, which is preferable in terms of both physical meaning and mathematical form. Furthermore, the...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0363
... formula ccnbd shale disc Rock mechanics hydraulic fracturing fracture toughness isrm method Wang gas shale shale disc MPa shale sample international journal specimen mode-i fracture toughness Mining Science shale experimental study tensile strength toughness mechanics 1 1...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-210
...] studied the effect of loading process on permeability of coal particle with size distribution. Reservoir Characterization inrush Rock mechanics experimental study Engineering initial porosity water-sand seepage characteristic seepage characteristic mining Upstream Oil & Gas formula...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-467
... simulate the train vibration load including static load and dynamic load [4]. The vibration force can reflect the irregularity, additional dynamic load and corrugation of rail surface effect. Its mathematical expression is as follow: tptptpptF 3322110 sinsinsin)( (1) In the formula, p0 is static wheel load...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-497
... 10 and 14. Observations used include sets of readings of mining height, road width and mining depth for each section. The [1] together with [2] safety factor formulae were used in the MC simulation of observed data. The idea was to select the formula which was most suitable ARMA 15-497 Coal mine...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-501
... remedial measures implemented. The mine adopted a Voussior Arch designed supported bord span of 12m at implementation phase. The adopted design was supported by the Hedley and Grant formula [1]. The designed pillars would support the weight of the overburden within the pillar tributary area. The mine is...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-817
.... PILLAR STRENGTH Lunder and Pakalnis [2] have proposed the following general empirical strength formulae for hard rock pillars: b a S h w BAKP (2) where, Ps is the pillar strength [MPa], K is the strength constant related to pillar material [MPa], w is the pillar width [m], h...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7443
... hydraulic fracturing pore pressure stability diagram Reservoir Characterization plasticity pore stress state fracture closure fracture breakdown Upstream Oil & Gas formula horizontal stress situ stress plane breakout equation tectonic strain fracture principal stress 1. INTRODUCTION...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-435
... & Gas formula argument fluid modeling equation of state compressibility natural fracture conclusion reservoir geomechanics net pressure expression fracture compliance compressibility argument fracture propagation Lacazette Wellbore Design Raaen pressure drop fracture radial fracture...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-302
... and on the value of crack width size on its outline and cross-sectional area. fracturing materials Upstream Oil & Gas formula Reservoir Characterization proppant stress state estimation Deformational Characteristic reservoir geomechanics fracturing fluid borehole outline state...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-326
... values from the empirical formulas used in ARMPS and LaModel. It seems reasonable that the overburden geology, depth, extraction panel width, and mining height should have a significant effect on the extent and magnitude of the abutment load. However, the current empirical formulas do not incorporate all...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-118
..., especially for predicting loads on the support structures. Zaslavskiy recommended using formula (2) for junction as well as for parallel openings. Maximum displacement according to formula (2) is at B/D = 0.57. Zaslavskiy explains this effect by failure of the pillar between openings in vicinity of the...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-016
... CONSTRUCTION SITE Displacement prediction in Er’tan underground power house was carried through by using the new empirical opening displacement formula in this section. Fig.2 showed the curve of the stress difference against the distance from side wall to intact rock mass after excavation. The stress level...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-074
... details. Results of 41 performed PLT tests are evaluated using ASTM and ISRM formulas as well as Unal method. It seems like the result of Unal analysis is more consistent and reliable. INTRODUCTION Bakhtiary dam and hydro power plant project is located in Lorestan Province, southwest of Iran. Dam will...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1154
... ABSTRACT: Salamon and Munro?s (1967) strength formula has been used successfully in South African collieries over nearly four decades. However, many post-1967 collapses that took place in old workings, led the research to concentrate on seam and coalfield specific strength formulae. Altogether...

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