... Abstract The strength and deformational behaviour of rocks under loading conditions are important in underground excavations, mining and every civil engineering constructions as it determines the stability of such structures. This study aims to augment the existing know-how on such behaviour...

... density, water absorption, apparent porosity, uniaxial compressive and tensile strength tests were performed to obtain data set for correlation analysis. With water saturation under atmospheric pressure, the uniaxial compressive strength and tensile strength of all studied lithotypes were reduced...

... Abstract The contribution from both surface roughness and matedness in the peak shear strength of rock joints is not yet well understood. To be able to account for the influence of matedness on the peak shear strength of rock joints, both surface roughness and aperture need to be considered...

... temperature, and low porosity. Although rockburst and spalling failures have both been observed in the past 50 years and investigated by numerous researchers, this phenomenon is yet mysterious and the physics behind is still not fully understood. Recent researches have suggested that the spalling strength can...

... government reservoir geomechanics sedimentary rock clastic rock mineral engineering criterion theory mars rock engineering strength consideration reservoir characterization earth environmental science 833 thermo-elasto-plastic evaluation civil engineering geological subdiscipline practice...

... porosity, water absorption at atmospheric pressure, resistance to salt crystallization, rupture energy, compressive strength, flexural strength, abrasion resistance and slip resistance. The achieved results remain into the expected ones for this kind of stone. Nevertheless, small differences were found...

... Abstract Amongst many mechanical properties, cohesion ( c ) and angle of internal friction ( φ ) are probably the most widely used rock and rock-like material strength design parameters. However, unlike Mohr-Coulomb (MC) failure criterion that assumes cohesion and friction angle are intrinsic...

... strength, and fault characteristics. To optimize the scanline method for the field study additional discontinuity attributes were added. One of these accessory attributes, the existence of discontinuity lags, will be discussed. It occurs when vertical and sub-vertical fractures cross sedimentary layers...

... Abstract Schist is highly variable in terms of intact strength, mineralogical composition and structure due to the provenance of parent rock and metamorphic conditions during formation. This paper explores the mineralogical and structural control on the intact strength properties of schist...

.... Therefore, a total number of fifteen specimens, prepared from samples obtained from various locations from the southern part of the East Attica Prefecture, Greece. The laboratory program involved the determination of the uniaxial compressive strength (UCS), the crack initiation (C ci ) and crack damage...

... reservoir characterization europe government halite rock engineering practice iop publishing iop conf environmental science 833 geological subdiscipline application exploitation safety ermashov theory correlation strength criteria reservoir geomechanics seam deposit potassium seam...

... Abstract The basic friction angle of rock joints is usually obtained from tilt tests, being the most common the laboratory tilt tests. This test has been standardized according to the ISRM. However, most of the times when calculating the shear strength of discontinuities, reference tables...

... of proppants, uniaxial compressive strength tests and long-term creep tests were carried out in the laboratory. The test setup consists of a proppant monolayer placed between two cylindrical rock samples that were axially loaded. We determined Young’s moduli and creep rates for sample stacks with various...

... strength and fracture properties of the new mix designs are compared against the controlled mixes at 0% waste glass inclusions. From the results, no impaired performance was recorded by substituting sand with crushed waste glass even at a high percentage ratio of up to 100%. While further research...

... geological subdiscipline plate tectonics fracture strength history orientation geometry extensional fracture granite europe government machine learning rock engineering theory crust Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth...

... been defined. The newly proposed procedure and relationships were successfully utilised to determine the intact rock strength of different rocks. The calculated UCS values are very similar when using both types of Schmidt hammer (L and N) and are generally in line with previous determinations from...

... drillability have been discussed by different authors. Uniaxial Compression Strength, Brazilian Tensile Strength, Shore Scleroscope Hardness, Point Load Strength are among the most important parameters [1–6]. Additionally, physical and mechanical properties of rocks show dramatic variations with temperature...

... in the specimens were microscopically observed. The geometry of each fracture was quantified by its length, opening and orientation. The results show that noticeable fracture propagation occurs mainly at the stress level above 80% of the Uniaxial Compressive Strength (UCS). In general, intergranular cracks...

.... Cylindrical specimens were heated to 250°C, and 500°C in an electric oven in laboratory conditions. Physical properties (density, ultrasonic pulse velocity) and non-destructive strength tests such as Duroskop rebound value were measured on samples kept at 22°C and on samples exposed to heat. The test...

... Abstract Scale or size effects of the uniaxial strength response in rock samples have been studied in detail in the past, so a good number of studies on different rocks are available. However, analyses on triaxial strength scale effects in rocks are scarce and they seldom address failure...