... al, 1974) are also scaled in the V-GSI chart to provide a unified scalable GSI chart and system. The VFC parameter is an intrinsic property of a given rockmass that is similar to Palmstrom s Jv, (Palmstom, 1982) but without any orthogonality constraints on block shape or assumed number of joint sets...

... wellbore design reservoir characterization rebar rockmass structural geology metals & mining deformation dilation excavation roadway bin wang rockbolt displacement rockburst application wellbore integrity zeyang guo weijun wang borehole bent rockbolt tensile strength...

... excavation abutment table 3 crockford reservoir characterization stability rockbolt itasca unsupported span reservoir geomechanics flat-roofed excavation rock mechanic equilibrium shear deformation displacement deformation separation optimization excavation abutment rockmass...

... conclusions but based on the available information the preliminary observations shows that the system is able to apply active forces, since the slope geometry is favorable for it. rockmass installation safety instrumentation mesh strength gobbi hoek rock mechanic geometry congresso brasileiro...

...A STUDY OF THE GEOMETRICAL SCALE-DEPENDENCY OF FRACTURED ROCKMASSES USING LIDAR SCANNING: THE CASE STUDY OF BROCKVILLE TUNNEL *I. Vazaios, N. Vlachopoulos, M.S. Diederichs Department of Geological Sciences and Geological Engineering, Queen s University 36 Union Street Kingston, Canada K7L 3N6...

... the stress level reaches approximately c/2 in both directions. An empirical biaxial failure is derived from a regression analysis of test results, and a new biaxial failure criterion for the jointed rockmass is proposed in an analogous way to the Hoek-Brown criterion, based on the test result and combining...

... examined. The obtained results show the influence of the rockmass quality on the anchor length of the rock bolt and on its behaviour as a means of reinforcement. Upstream Oil & Gas rockbolt boundary configuration reservoir geomechanics rockmass rock wall shear stress load distribution...

... rockmass parabolic section safety factor metals & mining Thickness underground support element application Reservoir Characterization abutment support design definite integral estimate parabolic curve parabola parabolic slice perpendicular support element stope support design 11th...

... ground behaviour. However, difficulties have been encountered with application of the strength criterion at the extreme ends of the rock competence scale. In the midrange of this scale, block size and incipient strength is such that rockmass behaviour tends to be controlled by inter-block shear strength...

...Mechanical properties for the rockmass in the central barrier of temporary shiplock in Three Gorges Project Les proprlstes mecaniques du massif rocheux dans la barrlere centrale de recluse temporaire, . dans Ie projet des Trois Gorges '" Mechanische Eigenschaften des Felsuntergrundes im Bereich der...

... monitoring can be used to track the development of zones of high stress concentration in the rockmass. Understanding the complex interaction between an underground operation and the stressed rockmass clearly requires knowledge of the state of stress as a function of location in the crust.Generally, the state...

... of the single most complex design issues in the mining industry. The importance of this aspect is also reflected in the attention given to it in the Health and Safety Act published in 1996. The methodology that is described and proposed in this paper deals with stope support design from a strata or rockmass...

... ABSTRACT: This paper deals with the derivation of relations that characterise the state of stress and displacements in the neighbourhood of a shaft face sunk in an elastic body (rockmass). Having taken into consideration the investigation results presented in the introduction, a general form...

... of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, People's Republic of China . . , ABSTRACf:According to elastoplastic damage deformation mechanism of jointed rockmass, a 3 - 0 elastoplastic damage constitutive model for intermittent multi - joints rockmass under initial damage. damage...

... Reservoir Characterization constitutive relation fracture damage model application stiffness Upstream Oil & Gas rockmass constitutive element rock mass Engineering strain energy plane jointed constitutive element hydraulic fracturing propagation deformation evolution equation...

... conditions that were marginally stable, or they may generate unstable rock fracturing accompanied by rockmass dilation causing sudden, large ground convergence into mine openings and drifts. They may also cause violent ejection of blocks of rock due to strain energy release or momentum transfer...

... ABSTRACT: Deformation around a newly excavated test drift in weak rock was continuously measured to clarify the time-dependent behavior of the rockmass in a mine. A two-dimensional Finite Element Method, of which element have non-linear visco-elastic characteristics based on the Maxwell's...

... formula for calculating the thickness of the broken zone on the basis of the strain-sofening and volume expansion properties of rockmass and analyses its affecting factors. Finally, the authors introduce a supporting practice of a deep roadway lying at a depth of 1155m below ground surface. RESUME I En...

... ABSTRACT: This paper proposes that the actual or mobilized unconfined peak strength of the rockmass is primarily a reflection of the overall system characteristics. A simple approach is presented for estimating this mobilized strength and for simulating the evolution of the breakout region...

... (plane strain condition). In this case the problem can be studied in the plane and the interaction between the two previously described structures is now defined by one single scalar parameter: the confinement Pi (radial action of the rockmass on the lining). The associated parameter is the closure...