However, due to factors such as in situ stress, tectonic stress, surface roughness, filling conditions, and their spatial distribution, the shear behavior of structural planes is exceptionally complex. ... It is acknowledged that differences in testing methods, joint types, rock strength, and testing equipment may lead to conflicting results in ...
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The mechanical rock-crushing efficiency is directly influenced by rock properties and joint structure. Tipped-hob is widely used in the construction of shafts. By analyzing the motion of tipped ...
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(1) Confining pressure increases the elasticity, strength (e.g., yield point and ultimate fracture stress), and ductility. (2) Internal pore-fluid pressure reduces the effective stress acting on the sample, thus reducing the strength and ductility.
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Abstract. The influences of displacing angle, joint gap, and rock strength to the performance of rebar bolts and D-Bolts are evaluated in this study. A new method was developed to apply pull and shear loads to the bolt specimen in any combination so that a displacing angle can be established in the range from 0 (pure pull) to 90° (pure shear). In the tests, five …
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This paper discusses some important factors to be considered when undertaking rock strength tests and describing the strength of a rock as assessed during field investigations.
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Which of the following is NOT a major factor that influences the strength of a rock? deformation. All changes in the original shape and/or size of a rock body are called. high confining pressure. under which of the following conditions do rocks exhibit ductile deformation.
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The mechanical properties of rocks are influenced by many factors. Fjær et al., 2008 proposed that, as a generalized elastic material, the elastic ... geophysical properties and rock strength ...
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Water content is one of the most important factors influencing rock strength. Considerable research has been carried out to investigate rock strength under both dry and …
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The rock type influences the strength of the rock as different types of rocks have different strengths. Temperature affects the strength of a rock as it can cause thermal expansion and contraction that can lead to cracking or breaking. Pressure can also affect the strength of a rock as high pressure can compress the rock, making it stronger.
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According to the aforementioned studies, rock strength and failure mode are influenced by both the grain content and loading rate, but the interaction between these two factors remains unclear. To clarify the effects of microscopic composition and loading rate on rock strength and failure mode, a series of compressive tests with various strain ...
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Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0).Lithology is commonly derived during log analysis, so m may be estimated (Table 1).What is needed still is an initial measure of rock strength provided by C 0. C 0 can be estimated from porosity or …
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The good bonding in a concrete-rock interface is an important premise to perform the supporting functions of concrete and shotcrete. However, the bonding strength of a concrete-rock interface is influenced by many factors such as rock mineral composition and textural features, surface roughness, interface treatments, and concrete mixture and its casting …
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A study has been made in the laboratory of the strength of a "suite" of coal measure rocks in uniaxial and triaxial compression. From the data obtained it is demonstrated that the compressive strengths are profoundly influenced by the composition, porosity and degree of compaction of the rocks.
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Figure 8 shows the relative influence of each individual input variable. The results of the analysis illustrate that the strength of heterogeneous rock is greatly affected by all considered input variables, while the strain rate ε ˙ is the most predominant variable affecting the rock strength in this study.
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A detailed discussion of the factors that influence the strength of rocks and the techniques for measuring it can be found in Jaeger and Cook (1969).
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The influencing factors of the shear failure properties of rock joints can be summarized as intrinsic and extrinsic influencing factors [].The intrinsic influencing factors mainly include JRC (determined by the grain size) and the mechanical properties of jointed rockmass (determined by the mineral composition and microstructure). Zhang et al. [] conducted direct …
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The principles of comminution rock breakage are similar in many respects to the blast fragmentation rock breakage principles (Kim and McCarter, 1998)minution engineering is the reduction of a coarse size distribution of rock particles to a finer size distribution, by applying energy to those fragments with a mechanical device (e.g. a crusher or a SAG mill).
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By analyzing the mechanical behavior and the strength of the rock specimens, the influence of water vapor pressure and strain rate on stress corrosion can be clarified. Furthermore, the stress corrosion index from the experiment can be compared with those of other researchers. Finally, the long-term strength of rock can be discussed, based on a ...
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Rock is an aggregate of mineral compositions with complex mechanical properties. The uniaxial compression strength (UCS), as one of the most important mechanical properties of rock, is used to ...
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Pre-existing cracks and associated filling materials cause the significant heterogeneity of natural rocks and rock masses. The induced heterogeneity changes the rock properties. This paper targets the gap in the …
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Study with Quizlet and memorize flashcards containing terms like What is not a major factor that influences the strength of a rock?, All changes in the original shape and/or size of a rock body are called..., High pressure and _________ are the conditions rocks are exposed to in order to exhibit ductile deformation. and more.
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1)I am pretty sure that the following which is NOT a major factor that influences the strength of a rock is c. age of rock 2)The answer for the second question is high temperature and high confining pressure 3) As heat and pressure increase, ductile deformation becomes more likely 4) Once the elastic limit of rock is surpassed, the rock may flow.
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Consequently, research on natural landscapes has generally focused on diagnosing complex tectonic controls on landscape evolution [e.g., (12, 13)], with far fewer studies focusing on the potential effects of variable rock strength on erosion rates and the evolution of river profiles [e.g., (7–10)].However, a recent series of studies based on field data (11, 17–20) …
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Therefore, it is impossible to derive a correlation between the strength of rock and weak plane. Influences of grain size or anisotropy on the estimated capability of correlations between UCS and BTS.
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The major factors that influence the strength of a rock include temperature, age of the rock, rock type, and time. However, temperature is not a major factor that influences the strength of a rock. While temperature variations can affect the expansion and contraction of rocks, it is not considered a primary factor in determining rock strength.
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The strength of a rock block is influenced by the strength of the intact part of the block as well as the strength of discrete defects (e.g. veins) within a block. In a highly interlocked jointed rock mass at low confinement, the high rock block strength causes geometric dilation, resulting in a rapid increase in the confined strength and thus ...
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The strength of a rock is primarily determined by the types, properties, and abundance of minerals comprising its composition, along with the type of applied stress and the duration of the deformation process. For example, the hardness of minerals within a rock significantly influences its overall hardness and strength, while fine-grained rocks ...
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The principal factors controlling the strength of solid rocks are: 1. mineral composition, structure and texture; 2. bedding, jointing and anisotropy; 3. water content; 4. state of stress in the rock …
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