Factors affecting rock strength—composition, structure, and environmental conditions like moisture and temperature—are discussed, alongside standardized testing methods like UCS and Brazilian ...
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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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These studies indicate that compressive strength is an important factor influencing penetration resistance performance, and for rock materials, their microstructure has a significant impact on ...
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Soil-rock mixtures in fault fracture zones are composed of rock blocks with high strength and fault mud with low strength. In this paper, in order to study the mechanical properties of the soil-rock mixture with non-cohesive matrix, a large-scale laboratory triaxial compression test with a specimen size of 500 mm×1000 mm is conducted, combined with numerical simulation …
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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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Strength is the ability of rock to resist stress without yielding or fracturing. It is influenced by the mineralogy of the rock particles and by the character of the particle contacts.
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temperature, confining pressure, rock type, and time
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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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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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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 rock mass strength is determined by the superposition of the effects of these two joints when the joint dip angles of the two joints are both between 45° and 75° the influences of joints on ...
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compressive and tensile strength testing on a variety of rock types. The individual influences are examined and the resulting effects on the value of m i are discussed. In addition, the way in …
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The strength of rocks is influenced by several factors, including their composition, structure, and geological processes they have undergone . One of the commonly measured strength properties of rocks is the uniaxial compressive strength (UCS), which represents the maximum amount of compressive stress a rock can sustain before it fractures ...
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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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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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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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Effect of environmental conditions. The behaviour and mechanical properties of rocks depend on a number of environmental conditions. (1) Confining pressure increases the elasticity, strength (e.g., yield point and ultimate fracture stress), …
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Specimen preparation (1) Materials and Molds. A similar model test was adopted in this study, and the model test materials used to prepare rock-like specimens should meet the characteristics of ...
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The strength of a rock is influenced by factors such as rock type, temperature, and time, while the age of rock does not significantly impact its strength. Therefore, age is the correct answer to the question. Understanding the characteristics of various rock types is essential in geoscience.
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The mechanical properties of rock masses are largely affected by water. A small change of the water content could lead to significant changes in the strength and deformability of rocks, which are responsible for many rock engineering hazards, e.g., landslides usually occur after heavy rains (Iverson 2000), and groundwater inrush may lead to karst collapse (Bai et al. …
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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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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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Rainfall and groundwater level fluctuation lead to frequent rock slope instability accidents. In order to analyze the influence of rock mass saturation on rock slope, the relationship between saturation and uniaxial compressive strength is introduced into the shear strength of rock mass. A kinematic LA method is proposed to analyze the three-dimensional (3D) stability of …
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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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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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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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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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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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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 influence of mineral inclusions on the overall mechanical behavior of the studied composite is well produced by the new macroscopic yield criterion (21), which improves fundamentally the one (4). However, sometimes it overestimates the yield strength. The influence of frictional parameter T is studied in Fig. 15(b) with f = 0. 1, ρ = 0. 3 ...
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