... got the rock specimens with intrinsic fracture, then carried out seepage tests with high seepage pressure (>1 MPa), in order to study the seepage regulation with different seepage pressures and confining pressures. The result stated that the relation between coefficient of permeability and net...

...;Yumlu 2001; Caceres Doerner 2005). metals & mining Displacement Contour CRF stope sudden loss knowledge management Simulation contour loading Canada strength vertical stress contour sublevel fracture stope confinement MPa secondary stope tensile stress development Rock...

... different confining pres- sures ( 3 = 2 MPa and 6 MPa) and pore pressures (p = 0 MPa, and 0.5 MPa). After, a series of multiple- step triaxial creep tests were performed under the same stress ( 3 and p) conditions at a constant temperature and humidity so that we can investigated the coupled effect...

... stress mechanical characteristic production monitoring renewable energy hydropower station analytical solution analytical method equation thickness direction high-temperature tunnel thermal conductivity MPa tensile stress tunnel compressive stress internal water pressure Rock...

... Testing failure mode MPa porous sandstone compaction band Haimson reservoir geomechanics criterion sandstone Bentheim sandstone failure-plane angle Magnitude Rock Characterisation, Modelling and Engineering Design Methods Feng, Hudson & Tan (Eds) © 2013 Taylor & Francis Group, London, ISBN...

... 50 SE to 85 SE 15 J4 160 65 SW to 85 SW 8 Random R1 130 55 SW to 40 NE 8.5 joints R2 190 60 SE to 75 NW 12.5 R3 30 60 NW 2 R4 55 30 NW to 60 SE 6 Table 2. The ground stress test value. Depth SH Sh Sv (m) (Mpa) (Mpa) (Mpa) SH/Sv 80 3.75 0.83 1.44 NW80.5 2.60 90 4.16 1.22 1.69 NW80.5 2.46 100 4.57...

... result hydropower station rock mechanics parameter mechanical property rock mass jointed rock mass wellbore integrity Engineering strength parameter MPa dip angle joint rock mass stress-strain curve connectivity rate Rock Characterisation, Modelling and Engineering Design Methods Feng...

... stress (in the range of 30- 65 MPa) and at temperatures in the range of 250 -350 c° . Assuming a power law relation between the creep rate and applied stress, values of 3.28 and 4.72 are obtained for stress exponent (n) at low and high temperatures whereas the range for Q value (activation energy...

... pressure due to previous plastic deformations in the specimen for various types of rock. will be desirable and give more validity to this test method. As a result, in this study, attempts are made to propose a Multiple-step Loading Damage Model, hereafter denoted as MLD model, on a mudstone (qu=6-8 MPa...

... URL horonobe url MPa siliceous mudstone overburden pressure mechanical property isotropic consolidation test hydrostatic pressure ISRM-Sponsored International Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods 1 INTRODUCTION As part of the research...

... the fracturing characteristics of the rocks. Triaxial tests are performed at five different confining pressures, namely 5, 10, 20, 30 and 40 MPa. Petrographical analysis is done to study the physical fracturing degree and mineralogy of the samples. In addition, the physical properties of the rocks are determined...

... plane intermediate principal stress compression Reservoir Characterization criterion MPa Strength Criterion triaxial strength criterion true triaxial testing fracture strength specimen Mogi Haimson deformability principal stress University 21 1 INTRODUCTION The most common rock...

.... A typical stress-strain response of the tested intact shown in figure 2. of classification of dip- s of the otropy and the specimens he specimen’s to simulate the sample specimen in the upper These dip direction degrees. Tri- at . The applied .5 and 3.5 MPa ns are , and treated specimens is The results...

... reservoir geomechanics strength axial strain radial strain different temperature structural geology volumetric strain loading orientation MPa Tournemire shale Reservoir Characterization orientation anisotropic rock investigation mechanical behaviour bedding plane Upstream Oil...

... load frame. Lateral stresses with different magnitudes are applied on two mutually perpendicular directions(σ 2 ≠σ 3 ),and varyingfrom 0 upto 17 MPa. The axial stress (σ 1 ) is increased until failure. The results are presented in form of octahedral shear strength (τ oct ) vs. mean stress (σ m...

... wellbore integrity cyclic loading reservoir geomechanics strength rock salt surface subsidence Reservoir Characterization Upstream Oil & Gas strain-time curve Wellbore Design cavern specimen MPa loading GPa storage cavern cavern closure creep test viscoplasticity cyclic...

... MPa. 0 1 2 3 4 5 0 5 10 15 20 25 Tunnel wall displacement [mm] p i [ M P a ] Ground Reaction Curve Support Characteristic Curve Figure 2: Rock-support interaction curves. The intact rock has a uniaxial compressive strength of ci=50 MPa, Young's modulus Ei=37.5 GPa and HB constant mi=12. The rock mass...

... are dominated by horizontal stresses, the tectonic stresses take absolute predominance, with the maximum horizontal principal stress up to 42.19 MPa, and the minimum horizontal principal stress up to 22.8 MPa. However, the in-situ stress fields are dominated by gravity stresses in Huainan and Pingdingshan coal...

... metals & mining displacement Earthquake machine learning ground transportation optimum design rail transportation design plan production cost slope rock mass MPa Artificial Intelligence stability analysis analysis result rock mass mechanical parameter safety limit...

... and are unable to regulate the incoming flows. Reservoir Characterization testing programme horizontal stress excavation construction powerhouse cavern Test Location MPa interpretation stress assessment information borehole underground powerhouse Picote II river reservoir geomechanics...