... ABSTRACT A new model for thermally-induced block displacement in discontinuous rock slopes is being explored inside a Controlled Climate Laboratory (CCL). The model is based on a hypothesized wedging mechanism that takes place inside the filled tension crack of a discrete block that rests on an inclined...

... passing through the convex nose of a slope. The geometry of the slope considered in this analysis is defined in Fig. 2, in which the slope has a tension crack in its upper surface. The following assumptions are made in the analysis (Hoek & Bray ,1981): 1) Both sliding surfaces and tension crack strike...

... Upstream Oil & Gas instability phenomenon investigation tension crack Buckle geometry bedding joint lavini flexural Reservoir Characterization elevation dip slope rock mass high dip slope rock slide limestone intermediate scarp slope surface scarp layered limestone Italy...

... ABSTRACT: : Several years or even decades after mining induced subsidence has stabilized, pot holes appear on surface, mainly around the perimeter of the subsided area where tension cracks existed at the time of subsidence. The holes vary in size from centimetres to several metres in diameter...

..., and so on r-. ". ., ' In general case. an echelon system of tension cracks forms at first (fig. I). They arise from defects of material structure and propagate along the planes of principal tension stresses. Narrow crushing zones (surfaces) begin to arise at a subsequent increase of shear load T or shear...

... reservoir geomechanics measuring point rock mass deformability procedure Reservoir Characterization tension crack dilatometer test deformability modulus determination deformability interpretation flat jack rock mass Rock mass deformability by Extra Large Flat Jack, Plate Load and dilatometer...

.... Details of the construction methodology are given in Grasso et al. 1995. The heading and benching excavation was performed using the drill-and-blast technique during the day shift and hydraulic hammer during the night shift. production control tension crack shallow tunnel stability production...

... Characterization Wellbore Design scale effect stability analysis rock joint strength criterion mohr-coulomb criterion wellbore integrity tension crack Barton Siltstone bedding surface Strength Criterion weak siltstone artificial slope cut cohesion investigation friction angle plane shear...

... Characterization colluvium progressive failure remedial work complex slope failure Hong Kong Upstream Oil & Gas mechanism investigation rock mass tension crack rainfall quality rock mass cut slope weathered rock mass landslide october 1983 A complex slope failure in a highly weathered rock...

... ABSTRACT: The paper shows that all brittle material and rocks, irrespective of the body shape and its structure, feature a common intrinsic regularity of shear failure - formation of the tension cracks at the initial phase and the zones of compression and crushing in the principal stress...

... strength in the direction normal to foliation surfaces. strength calculation water pressure original slope back analysis stability knowledge management displacement cohesion dry condition shear strength foliation surface tension crack equilibrium weighted distribution failure plane...

... in a tension crack was accepted, failure would be likely to have occurred at a strength close to the remoulded, peak drained strength. The properties of the clay gouges as determined in the laboratory are given below. (Everitt (1979), Van Wieringen (1977». Table 1. Table 1 Slide Ifafa Ifafa Mtwa1ume Mayat P1...

... tension crack cohesion slope failure metals & mining wedge discontinuity south slope strength plane southern slope inclination volue saturation friction angle supposition slope stability Upstream Oil & Gas smreka stability instability elevation exploitation SLOPE...

... a model suitable for analysis of a slope cut steeper than 45 degrees which remains stable for a few decades or less and then develops a deep tension crack, finally collapsing by sliding along a curved slip surface. Yet this is precisely what occurs time and again in weathered rocks. Gradual loss...

... in the vertical plane; it starts with initiation of inclined tension cracks at the upstream side of the dam and culminates in compression and crushing of rock mass under the downstream toe of the dam where a kind of a plastic hinge is formed. Based on obtained regularities, an analytical relationship τρ = f (б n...

... formation, tension cracks are formed in the sandstones. A striking feature of the landslide phenomena in the Siwaliks is that shear failure appears always to be confined to the clay-shales. The sandstones fail only in tension or are attacked by shallow surface weathering. Upstream Oil & Gas...