... circulation system with three wells in the target reservoir, after stimulations in PX-2 and PX-1. Upstream Oil & Gas Reservoir Characterization stress ratio stimulation geothermal reservoir px-2 well amplitude Injection Rate hydraulic stimulation orientation MPa stimulation data...

... Abstract It is of interest to numerically simulate hydraulic fracturing in block caving as an aid to underground mining. UDEC TM software was used to simulate the behavior of a two-dimensional jointed rock mass with a defined undercut under biaxial in-situ stresses. The effect of stress ratio...

... points do not represent a large variation and has a similar tendency in the site. Figure 7. Distribution of the horizontal stress components in the test sits in Seoul. 4.2 Stress ratio (K) In general, the stress ratio (K), which is a ratio of the horizontal principal stress to the vertical principal...

.... Brittle failure behavior with associated exten- sional fracture development has been hypothesized by Kaiser & Kim (2008) as a controlling mechanism in the development of water conductive zones beneath the tunnel invert (or elsewhere around the tunnel depend- ing on shape and stress ratio). Such brittle...

... in general. Depending on the availability ofwater swelling phenomena are expected in middle- or long-term due to the transformation of anhydrite/gypsum. Upstream Oil & Gas Thickness water conductivity wall rock stress ratio tunnel construction sulphate micro crack moisture deformation...

... added. solid waste management residence time fractured rock Upstream Oil & Gas stress effect fracture network hydraulic fracturing stress ratio nuclide transport hydraulic gradient case fluid flow fracture horizontal hydraulic gradient case numerical study diffusion particle...

...)- for which the minimum value of dilatancy follows the maximum stress ratio experienced by the material. 1. INTRODUCTION In recent years, considerable efforts have been devoted to the mathematical development of constitutive elasto-plastic models capable of reproducing those aspects of the observed...

.... stress ratio rubber sheet RC segment airtight lining structure natural gas storage cavern lining structure experimental cavern Upstream Oil & Gas split lining excavation rock mass internal pressure lapse time Deformation Characteristic Reservoir Characterization displacement...