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Keywords: critical value
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Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-169
... critical values, critical crack length L c and critical crack capacity C c, to explain the phenomenon that P r (a) is less than P s. It is concluded that P r (a) is between P r0 and P s when C c appears earlier than L c. Comparing experiments by hydraulic fracturing in 3 boreholes of about 5 m...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-177
... ABSTRACT This paper presents two cases in which the 3-D finite element method was applied in predicting critical value of pressure drawdown (CVPDD) in two wells with openhole completion and well with casing completion, respectively. In this paper, CVPDD was chosen on the basis of maximum...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-1109
... increase of pi beyond pif, the radial cracks will open and extend in a stable manner, until pi attains a critical value, pi,uit, necessary for unstable crack propagation and cylinder failure. -For high values of Po, there will be no radially fissured zone formation, but at pi = Pif, the rock will start...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 35th U.S. Symposium on Rock Mechanics (USRMS), June 5–7, 1995
Paper Number: ARMA-95-0135
... to determine the fracture toughness. This critical value was then used as an index for creep-induced rupture. The crack mouth opening displacement (CMOD) was used to calculate the crack length and the stress intensity factor. Unlike load-point displacement (LPD), CMOD varied significantly when the creep test...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the The 16th U.S Symposium on Rock Mechanics (USRMS), September 22–24, 1975
Paper Number: ARMA-75-217
... Wellbore Design strength strength parameter reservoir geomechanics orientation Reservoir Characterization critical value geostatic stress ratio geostatic loading Rock mechanics plane excavation underground excavation loading excavation surface boundary rock mass equation procedure tunnel...