... characterization extensometer maximum failure zone reservoir geomechanics displacement failure zone upstream oil & gas rmr development drift shotcrete mesh safety factor rock mass strength ground support turquoise ridge inflatable bolt convergence excavation convergence rate ARMA 20 1712...

... and effectively. In this article, both engineering design methods and caving assessment methods are discussed, and suggestions are provided to outline when and how to incorporate veins and joints into design. Reservoir Characterization Engineering rock mass strength veined rock mass metals & mining...

... with a trilinear strength estimation methodology is used to develop rock mass strength parameters relevant for numerical stress modelling and geotechnical design at the excavation scale. reservoir geomechanics alteration consideration Reservoir Characterization strength rock mass strength knowledge...

... strength data mining Martin international journal excavation Diederich Rock mechanics brittleness index Kaiser Indicator Hajiabdolmajid structural geology brittle behavior rock mass strength rock mass equivalent plastic strain mobilization extension plastic strain field stress ARMA 18...

... is introduced and its characteristics outlined. Then, an overview of the available methods for assessing rock mass strength are presented to show the limitations of these methods in veined and especially WVR. The low strength estimates at both low and high confining pressures obtained by using the HB-GSI...

... the test sample, the more accurate is the representation of the rock mass strength. Conversely, the smaller the test smaller, the less accurate is the representation of the rock mass strength. Mark (2006) found that standard (small) uniaxial compressive strength tests, are not useful for predicting pillar...

... the coal industry because they have a better representation of the rock mass strength (sample sizes > standard sizes) and large databases of case histories providing sufficient statistical representation of both stable and failed cases. Additionally, coal pillars generally have larger width to height...

... models to laboratory scale results, large scale SRM models fall to the paradox of having to use empirical strength formulae to define acceptable ranges of modelled rock mass strength and deformability. 4. Because the modelling approach used in SRM analysis involves running suitable biaxial (in 2D...

.... An approach to constructing these models with 3DEC is outlined and the results of studies on veined rock mass strength and fragmentation associated with mining are described. In general, the results of testing to date suggest that the approach may be well-suited to studying the mining response of massive...

... relaxation. Numerical testing of SRM samples under specific stress paths may be an alternative to characterizing relaxation induced damage and its effect on rock mass strength. Preliminary results presented in this paper show the development of damage during the process of unloading. metals...

... a challenging task accompanied with undefined uncertainty. In this article, existing empirical relations developed for estimating rock mass strength based on RQD are reviewed and evaluated. Other methods based on rock mass classification are also reviewed. The published data regarding rock mass strength have...

... Abstract: Due to the nature of the rock mass strength the stability assessments for the design of the West Big Rock pit walls at pre-feasibility level considered both the rock fabric and the rock mass strength. Kinematic analyses (based on stereographic projections) were conducted to search...

... Abstract: There are two contributors to rock mass strength: (1) the strength of the intact rock and (2) the strength of the fractures or flaws. The flaws in a rock can occur at several scales: (1) centimetre scale where the micro-defects are healed with infilling that is usually weaker than...

...] approach in combination with the equation proposed by Panthi [1] for the estimation of rock mass strength for highly schistose rocks of the Himalaya. Measured tunnel convergence (squeezing) and lab tested mechanical properties of the rocks from headrace tunnels of Kaligandaki and Middle Marsyangdi...

... procedures [1], but in that paper they did not delineate the detailed principles that the high stress designation is based on. In this paper, these principles shall be discussed at length through analyzing the rock mass strength, the Hoek-Brown Criterion (HB) and the critical equilibrium state of a rock mass...

... ABSTRACT Estimation of rock mass strength has become more critical in recent years due to the increase in the number of mining and civil projects at greater depths (> 2 km). Empirical approaches for the estimation of rock mass strength (e.g., Hoek-Brown/GSI) are primarily based...

... of the use of the Hoek-Brown failure criterion for estimating global rock mass strength, the Barton empirical equation for discontinuity shear strength and the empirical estimation of rock mass deformability. Analytical methods include both limit equilibrium and finite element methods and use of Strength...

... & Gas friction modeling mechanism proceedings Symposium fracture rock mass strength rock mass property roof collapse rock mass mechanics symposium Simulation cave development fracture system Rock mechanics Symposium Elmo excavation tensile strength ARMA 10-472 Simulations of roof...

... ABSTRACT: The proposed Caldecott 4th Bore, located along State Route 24 in Oakland, California is a 15 m wide, 9.7 m high, highway tunnel that will be constructed using the New Austrian Tunneling Method (NATM). Rock mass strength and deformability properties including local effects due...

... of rock mass strength. The strength of this material was assessed using consolidated undrained triaxial tests with pore pressure measurements, point load tests and empirical methods (Hoek-Brown). Hoek-Brown strength envelopes of the overall rock mass were then developed for effective stress design...