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Keywords: water pressure
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0262
... ABSTRACT: The law of hydraulic pressure in the cracks is the basis for studying the hydraulic fracturing of rock mass and concrete. According to the characteristics of hydraulic fracturing of high dams and deep tunnels, the flow model of the fractures under constant water pressure is...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0655
... tensile crack Reservoir Characterization Wellbore Design numerical analysis water pressure hydraulic fracturing mechanics geomechanics symposium specimen wellbore integrity inner flaw tip june 2016 Gonçalves da Silva geomechanics symposium geothermal reservoir experiment American Rock...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0630
... deformation analysis fluid particle dda analysis wall particle disk block DDA block DDA analysis model particle mp analysis Particle Simulation water particle Upstream Oil & Gas polygon block disc block water pressure water flow 1. INTRODUCTION Topographically the mountainous area in...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0415
... water pressures, and temperatures. Water circulated through the reservoir was measured for flow rate, pressure and temperature. Also, an overburden pressure was applied to the slabs to simulate actual overburden soil and rock. The workability of the laboratory-scale experimental setup for the geothermal...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0563
... of contact stresses along the contact interfaces were significantly affected by the lateral water pressure. 1. INTRODUCTION flow in porous media tbm tunnel segmental water pressure Reservoir Characterization waterflooding gasket test result gasket-to-groove contact interface...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-587
... energy plane complex reservoir porosity hydraulic fracturing pore water pressure fracture system tensile strength permeability Mech fracture finite element Bazant Detournay hydraulic fracture propagation equation 1. INTRODUCTION The recent advances in hydraulic fracturing of oil and...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-141
...: Section 2 describes the test setup used in the tests and Section 3 describes the device used to apply water pressure in the pre-existing flaws. Section 4 describes the imaging methods used in the tests, namely the High-Resolution camera and the High-Speed Video camera, while Section 5 describes the data...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-164
... abutment weak rock mass model test foundation reinforcement deformation abutment structural plane stability rock mass reservoir geomechanics specimen geo-mechanical model test weak structural plane water pressure upstream oil & gas displacement 1. INTRODUCTION Jinping I Hydropower...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-502
... over approximately five seconds corresponding to crack initiation and propagation. The AE setup was used in a series of hydraulic fracturing experiments on granite specimens. It was found that for one particular specimen, few emissions were observed until the applied water pressure reached 90% of the...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-666
... them. Schleiss points out that when a lining is pervious, seepage will flow into the surrounding rock mass through cracks, joints, or fractures, with the result that the internal water pressure will exert a load not only on the inner surface of the lining but also within the rock mass itself [1]. As...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7561
... Abstract We developed recently a new apparatus which allows laboratory fracturing experiments under tri-axial compression up to 15 MPa with pore water pressure up to 15 MPa. Silica sands with particle size of about 125&#956m are used as the simulated formation materials. In addition to...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-118
... displacement and water pressure in the partially undercut slope, but also to perform as a criterion for failure warning system during mining operation. The monitoring data obviously shows that the displacement of the undercut slope related to the undercut operation and the precipitation amount. This field...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-676
... directed network. Node and branch laws of water flow in discrete fracture networks are derived based on the conservation of mass and energy. The topology theory is applied in order to search the subways of water flow, and to calculate water pressures and flow rate in each branch of a weighted, directed and...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-236
... stability, limit equilibrium analyses using Bishop Method and a finite element analysis including ground water pressures and additional support interactions are both used. 2. GEOLOGICAL, GEOTECHNICAL AND HYDROGEOLOGICAL INVESTIGATION The stratigraphic sequence starts with a Permo-Triassic subduction...
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-10-116
... exist great difficulties in the construction of the tunnel. Reservoir Characterization discontinuity surface fracture characterization convergence water pressure rock mass characteristic new qidaoliang tunnel Upstream Oil & Gas tunnel excavation sandstone Fracture Zone dip angle...
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-10-193
... & Gas east wall hydraulic fracturing debris open pit Elfen workflow rock mass Reservoir Characterization intrusive centre water pressure horizontal displacement contour upper bench udec result fault system strength pebble breccia dyke dyke expansion joint fabric 1. INTRODUCTION The...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-199
... has been examined. More disturbances in the contours of hydraulic head and pore water pressure have been observed near the tunnel periphery. The change in permeability upon redistribution of stresses is a function of the opening/closure of the joints. It has also been shown that the orientation and...
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-06-1126
... fracture network rock mass fracture application discrete fracture network FracMan Elfen intensity hydraulic fracturing strength characterisation water pressure pillar Rock Mech 1. INTRODUCTION The use of numerical models that incorporate the effects of fracturing is well established. Models...
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-01-0077
... pore pressure response was extremely slow, corresponding to a permeability of -10 '22 m 2. Swelling and velocity reduction were also observed. In undrained hydrostatic compression tests, negative pore water pressures were measured, arising from capillary forces. However, other evidence indicates that...
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-99-0071
... adjacent Swingle's Quarry failed during uncontrolled dewatering in 1983 and permanently buried the drowning victims thought to be lost in that quarry. rock slope subject Piezometer quarry water level water pressure alignment law enforcement drawdown water drawdown stability quarry water...

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