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Showing 1 to 20 of 20 for “"Uniaxial Compressive Strength"”.
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Load and resistance factor design of drilled shafts in shale using SPT and TCP measurements
… Factor Design (LRFD) methods that relate uniaxial compressive strength measurements of rock cores to the side and tip resistance for drilled shafts. However, shale and other weak rock can be notoriously difficult to effectively sample and test, which poses practical problems for those …
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Stability of Coastal Cliffs along the Pembrokeshire Coast National Park
… rock exposures. Field and laboratory values for uniaxial compressive strength were comparable. Joint roughness coefficient (JRC) obtained from tilting tests suggested that standard equations were more applicable to situations of low roughness rock with low normal strength.Failure modes for cliffs …
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The engineering geology and stability of the rapidly alternating limestone and mudrock sea cliffs of glamorgan
… and induce rehydration of the double layer. <br/>Uniaxial compressive strengths of representative mudrocks were determined for a range of moisture contents. Mean values varied between 5 and 64 MPa. An investigation into deformation anisotropy of a clay shale is also recorded. Meso and micro scale …
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A study of impact breakage of single rock specimen using discrete element method
… mechanical properties (Young's modulus and uniaxial compressive strength) of the numerical specimens. A comparative study of single rock specimen breakage using the current BPM-DEM and laboratory SILC experiments carried out by Barbosa et al. (2019) was conducted. The measured fracture force …
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The stability of coastal cliffs along a section of the Ceredigion coastline
… within each till unit. Comparative values of uniaxial compressive strength were obtained to represent the geotechnical properties of the various cliff materials. <br/><br/>Temporal and spatial variation in erosion rates were considered to be a function of environmental, beach and cliff …
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Study of unstable rock failures using finite difference and discrete element methods, A
… element and finite difference methods. Simulated uniaxial compressive strength tests are run on brittle rock specimens. Stable or unstable loading conditions are applied onto the brittle specimens by a pair of elastic platens with ranging stiffnesses. Determinations of instability are established …
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Experimental analysis of the post-failure behavior of coal and rock under laboratory compression tests
… mine. For establishing structural stability, the strength of the strata is determined by recovering the cores. The strength is determined through various methods and one method in particular is the Uniaxial Compressive Strength of the rock, which is commonly adopted as the standard strength …
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Coal mass rating with regards to outburst and coal burst
… Rating (CMR). The CMR is a ratio analysis of Uniaxial Compressive Strength (UCS) results that produces three CMR metrics: CMR FROM UCS, CMR from Young’s Modulus, and combined CMR. The first hypothesis tested for a correlation between burst coal with higher CMR values relative to increased …
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Study of fault gouge influences on mechanical and frictional behavior of granular shear zones using the distinct element method
… alone does not explain the low frictional strengths of simulated granular assemblages. Shear zone strength is dependent on the competition between strength reduction by fracturing and strength variation by changes in grain characteristics that are related to the partitioning of different …
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Development of an early warning system for predicting rock bursts and rock induced displacements in seismically active mining blocks at Mufulira underground mine (deeps section).
… for intact rock mass to determine unconfined compressive strength (UCS), secant and tangent Young’s Modulus (E Sec and E Tan), and secant and tangent Poisson's Ratio (ν Sec and ν Tan), Brazilian and Triaxial Compressive Strength tests as well as geological field mapping methods to understand …
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Borehole Breakouts in Transversely Isotropic Posidonia Shale
… of PN. Both shales show marked elasticity and strength anisotropy, which can be attributed to a macroscopic distribution and orientation of soft and hard minerals. Under load the hard minerals form a load-bearing, supporting structure, while the soft minerals compensate the deformation. …
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Engineering geological characterization of volcanic rocks of ethiopian and sardinian highlands to be used as construction materials
… characteristics. The laboratory work included Uniaxial Compressive Strength, Abrasion resistance, Ultrasonic pulse velocity, Bulk density, Water absorption, Specific gravity, Porosity, Petrographic examination, Aggregate Impact Value (AIV), Aggregate Crushing Value (ACV), Los Angeles Abrasion …
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Rock Drilling with impregnated diamond microbits
… by optical petrography and by the measurement of uniaxial compressive strength and relative abrasion resistance. A computer controlled electronic data logging system was used to record the power consumption, the rotational velocity, the bit thrust, the torque and the penetration rate. Tests were …
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Scale-model investigation of brittle tunnel failure using a true-triaxial device
… of sedimentary rock while maintaining a low uniaxial compressive strength (UCS). This combination of weak and brittle response was vital, as it allowed for using a lower-capacity true-triaxial loading apparatus and enabled large specimens, making it accessible to observe and document the …
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Assessment of geotechnical considerations for ground control and stability at Nkana Synclinorium copper mine Mopani Plc, Zambia.
… shotcreting were done by using pull tests and uniaxial compressive strength (UCS) tests. Pull Testing was done in selected mine excavations to provide a quantitative measure of the relative performance of different anchor systems and compressive strength tests on concrete cubes were used to …
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Assessment of geotechnical considerations for ground control and stability at Nkana Synclinorium copper mine Mopani Plc, Zambia.
… shotcreting were done by using pull tests and uniaxial compressive strength (UCS) tests. Pull Testing was done in selected mine excavations to provide a quantitative measure of the relative performance of different anchor systems and compressive strength tests on concrete cubes were used to …
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Investigated physical/strength properties and elastic constants of fimbul granular ice applied to ice cliff stability analysis
… of snow ice structures and crystalline ice. The strength value tested was Uniaxial Compressive Strength (UCS), with shear strength and tensile strength determined afterwards. The UCS tests gave a value of 0.9±0.27MPa. The compression was carried out at a strain rate of 10-4.3 s -1 for ductile …
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Effect of concrete heterogeneity on FRP-to-concrete bond behaviour
… reinforced polymers (FRP) are widely used for strengthening or retrofitting deteriorated structures, due to their various advantages. In FRP-strengthened concrete structure, one of the main failure modes is the premature bond failure, which prevents the exploitation of the full capacity of FRP …
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CO2-rock interaction during CO2-enriched brine injection into storage reservoirs using NMR integrated with fiber optic sensors
… changes to avoid compromising the geo-mechanical strength of the reservoir rock, which could reactivate faults and lead to pathways for CO2 leakages. Rock strain is conventionally evaluated by linear variable differential transformers (LVDT) and electrical resistance strain gauges (ESG) that are …
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Laboratory Strength Testing of Argillaceous Limestone Under Varying Saturation, Scale, Loading Rate, and Confinement Conditions
… have been investigated through the laboratory strength testing of specimens representative of Cobourg limestone found at depth for the proposed low and intermediate level DGR site. Using standardized laboratory testing practices and newly developed experimental methodologies, this thesis …