Influences On Strength Of Rock

Rock mass properties

Many rocks show a significant strength decrease with increasing moisture content and tests on samples, which have been left to dry in a core shed for several months, can give a misleading …

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Influences of Schistosity Structure and Differential Stress on …

The anisotropic mechanical properties of thin foliated rock under the influences of foliation and stress can be obtained by laboratory testing; however, there have been few …

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CLASSIFICATION // CHARACTERIZATION OF SOME …

Intact rock strength . The uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part. It is determined in accordance with the …

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INFLUENCE OF INTACT ROCK STRENGTH ON ROCK …

Empirical assessments of rock mass mechanical properties often rely on a classification approach (i.e. Rock Mass Rating (RMR), Geological Strength Index (GSI), Q system), where several …

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Influence of heterogeneity on rock strength and stiffness using

The influence of relative strengths of lithological units of the heterogeneous rocks on the overall strengths and stiffnesses of the composite heterogeneous rock specimens was also …

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Influences of Schistosity Structure and Differential Stress on …

Foliated rocks are often encountered in underground engineering, and the spatial orientation relationship between its foliation and in situ stress controls the stability of the …

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Influence of water content on the strength of rock

Hawkins and McConnell (1992) carried out tests to determine the influence of the water content on the strength of 15 sandstones. They found that the relationship between …

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Rock

Effect of environmental conditions. The behaviour and mechanical properties of rocks depend on a number of environmental conditions. (1) Confining pressure increases the …

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Influence of Asperity Morphology on Failure Characteristics and …

The asperity morphology has profound influences on the failure characteristics and shear strength of rock joints. To investigate these influences, degradation characteristics and …

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GEOLOGICAL INFLUENCES ON THE STRENGTH OF …

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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Influence of intermediate principal stress on rock strength: …

Especially when the flaws are parallel to σ 3 direction, the rock strength will be higher than the condition in which flaws are parallel to σ 2 direction. In this situation, the rock …

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Influence of Cyclic Wetting–Drying on the Shear Strength

Cyclic wetting–drying can greatly influence rock properties such that a significant decrease in mechanical strength can be expected for a rock undergoing wetting–drying cycles …

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The influence of microwave treatment on the compressive and …

The results show that the rock strength decreases generally with increasing microwave power and treatment duration. The strength losses and the heating degrees are …

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Influence of surface roughness and hydrophilicity on bonding strength

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 …

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Influences of Interface Roughness and Loading Direction on …

The roughness and stress state of a rock–concrete interface significantly affect the tensile behavior and failure mechanisms. It is of great significance to investigate rock–concrete …

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Shear behaviors of natural rock fractures infilled with cemented

Multi-scale discontinuities in the forms of faults, joints, fractures, veins and bedding planes have a controlling influence on the mechanical behaviors of rock masses, because they …

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Geological factors and strength of rocks

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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What are the most important parameters effective on the strength …

Mineralogy: Different minerals have different strengths. Some minerals, such as quartz and feldspars, are relatively strong, while others, like clay minerals, are relatively weak. …

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(PDF) Influence of Water Content on the Strength of Rock

Saturation is an important index affecting the mechanical properties of rock mass. Considerable research has been carried out to investigate rock strength under both dry and …

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Influence of rock mass properties and powder factor on the fractal

The rock mass fragmentation in discontinuous rock mass is a concern issue in rock mass blasting. The purpose of the study is to find out the influencing parameters of rock mass …

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Which is not a major factor that influences the strength of a rock?

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 …

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Influence of degree of interlock on confined strength of jointed hard

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 …

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Influences of Loading Condition and Rock Strength to the Performance …

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 …

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Influence of grain contents on the dynamic strength of rock-like

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 …

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Numerical investigation of the influence of specimen size on the

The majority of laboratory and in situ experiments on the influence of scale on rock strength such as those reported by Bieniawski [3], Pratt et al. [30], Hoek and Brown [13] and …

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The influence of pore geometry and orientation on the strength …

Although two-dimensional micromechanical and numerical models exist to help understand the influence of uniformly aligned microcracks (e.g., Ashby and Sammis, 1990) …

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Influence of Water Content on Mechanical Properties of Rock in …

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 …

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Numerical analyses of the influences of rock properties and joints …

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 …

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INFLUENCE OF INTACT ROCK STRENGTH ON ROCK …

INFLUENCE OF INTACT ROCK STRENGTH ON ROCK MASS MECHANICAL PROPERTIES ABSTRACT The Synthetic Rock Mass (SRM) approach has the potential to capture the …

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Rock Strength

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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Effect of roughness on the shear behavior of rock joints subjected …

To experimentally study the influence of joint roughness on the shear behaviors of the rock joint, the direct shear tests under monotonic or cyclic loading conditions have been …

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Experimental investigation of the Rock–Concrete bi materials influence

The combined fractures were partly observed in the sample series where the concrete strength is higher than the rock strength and crushing was mostly observed at the …

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Influence of Intermediate Principal Stress on Mechanical and …

Since an increasing number of rock engineering structures are constructed in the stratified rock mass, a comprehensive understanding of the mechanical properties of …

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The influence of joint distribution characteristics on the …

The influence of joints on the strength and deformation characteristics of rock masses is fundamental to rock mass stability analysis. Therefore, it is of great significance to …

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The influence of microwave treatment on the compressive and …

It can be concluded that microwave irradiation has important influences on the strength of igneous rocks depending on the applied energy, the exposure time, and …

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Experimental study of the influence of wetting and drying cycles …

However, the influence of WDC on strength of rocks in the red stratum of the Badong Formation as well as the weakening mechanism have not been comprehensively …

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Influence of the strength of rock-like models on the local …

Due to various geological transformations, rock masses often show different types of flaws (pores, cracks, joints, and faults). The mechanical properties of these flaws largely …

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Experimental study on influence of host rock strength on shear

The direct shear test is commonly used to study the shear properties of the bolting rock joint. It was first used by Bjurstrom to carry out the shear mechanics experiment of bolting …

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Laboratory Testing and Interpretation of Rock Properties

Rock shear strength is influenced by the ove rburden stresses; therefore, the larger the overburden stress, the larger the shear strength. In some cases, it may be desirable to …

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