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Rock mass discontinuity

Web26 Jul 2024 · Geological discontinuity is normally recognised as a general term to describe any mechanical break (lacking significant tensile strength) within rock masses, including most joints, weak bedding planes, weakness zones and faults (ISRM, 1978). WebRock mass is a matrix consisting of rock material and rock discontinuities. Its characterization and classification aim to determine the rock mass characteristics by assigning values to a set of rock parameters. The behavior of intact rock material can be determined by continuum mechanics but rock masses are usually highly fractured.

Rock Discontinuities Identification from 3D Point Clouds Using ...

Web6 Apr 2024 · Due to the significant differences between the mechanical parameters, such as Young’s modulus and compressive strength obtained from mechanical tests and the actual rock mass, considering the influence of the discontinuity of the actual rock mass on the rock mechanics parameters, RQD values for each rock layer are used as a measure. WebDiscontinuities are classified into five surface conditions that are similar to joint conditions in RMR ( Chapter 6 ). 1. Very good 2. Good 3. Fair 4. Poor 5. Very poor A 6 × 5 block in the matrix of Figure 26.1 is picked up first according to actual and undisturbed rock mass classification and discontinuity surface condition. potatisvitlök https://baradvertisingdesign.com

Rock Mass & Rock Matrix - Discontinuities - Mineral …

Web1 Apr 2024 · Rock discontinuities significantly influence the deformation as well as strength of rock masses. Identification of rock discontinuity sets is one of the fundamental issue … Webrock mass strength in numerical analysis is through modelling of rock masses as continua with reduced deformation and strength properties [6]. Methods based on this approach, … WebRock mass classification schemes have been developing for over 100 years since Ritter (1879) attempted to formalise an empirical approach to tunnel design, in particular for … potatisvatten

Geological Strength Index - an overview ScienceDirect Topics

Category:Discontinuity orientation SpringerLink

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Rock mass discontinuity

Rock Slope Stability Analysis Incorporating the Effects of

Web14 Jun 2024 · Abstract. Estimating the boundary between continuity and discontinuity of rock mass is the first and most important step in determining whether a rock mass behaviour analysis should be treated as continuum and discontinuum. Existing rock mass characterisation methods such as the continuity factor (CF) and spacing ratio (SR) have … Web14 Jan 2024 · Geological characteristics of the rock mass such as lithology, fracture orientation, and morphology, karst phenomena (caves), rock weathering, and so forth can be detected by acquiring high-quality drill hole wall images [11,13]. In this paper, statistical analysis of the fracture pattern data obtained by borehole camera technology was …

Rock mass discontinuity

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Web12 Apr 2024 · To determine and compare the measurement uncertainty of different geological-geotechnical testing methods, numerous test locations were selected in a hard rock quarry. Measurements were carried out along two vertical measurement lines perpendicular to the mining levels of an existing exploration. Along these lines, the rock … Web1 Jul 2024 · Application of the image processing techniques (IPT) to identify rock mass geometry provides more fast information about discontinuity properties used in geo-engineering characteristics. In this regard, the field survey can be improved using IPT. This study has utilised the IPT to identify the discontinuity and block volume characteristics in …

WebVariation in discontinuity frequency as a function of scanline orientation in a plane is studied for rock masses containing sets of discontinuities. The spacing values between discontinuity intersection points that can occur along such scanlines are considered in order to develop a probability density distribution of block lengths. WebAs previously stated, not all stratification planes and foliation planes are mechanical discontinuities. However, at the scale proposed, it would not be possible to differentiate between those that are and those that are not. As such, it is proposed that all potential …

Web6 Oct 2024 · For example, Shi Genhua proposed the block discontinuous deformation analysis (DDA) method based on the discontinuity of rock mass medium, taking the role of joints into account in the rock mass ... WebThe analysis of the rock mass and its discontinuity network requires land surveys, drilling and sampling operations. The slope stability analysis is performed at different scales: at small-to medium scale (one bench or a set of benches) and at large scale corresponding to the overall pit slope. The value of the factor of safety used to design ...

Web5 Aug 2024 · 1) RANSAC Discontinuity Detection (RDD) can identify the feature point set of discontinuities from a raw point cloud, and can calculate the discontinuity orientation. 2) …

Web15 Dec 2024 · For natural rock mass discontinuity, the heaves on the surface of discontinuity have the same strength with rock mass under the condition of nonfilling. However, it is very difficult to guarantee that there is only a small difference in strength for the heaves and rock mass. potato chips joint painWeb13 May 2024 · This study wants to give a contribution to the semi-automatic evaluation of rock mass discontinuities, orientation and spacing, as important parameters used in Engineering. In complex and inaccessible study areas, a traditional geological survey is hard to conduct, therefore, remote sensing techniques have proven to be a very useful tool for … potato glycoalkaloidsWebDiscontinuityis any structural or geological feature that changes or alters the homogeneity of a rock, which may be technically joints, bedding planes, minor faults, or other surfaces of weakness such as cleavage and schisto sity planes. It excludes major faults, since they are considered as structural regions of their own. potato aloo tikkiWeb28 May 2024 · Discontinuities include all types of mechanical break or plane of weakness in rock masssuch as joints, bedding plane, fractures and shear zones that weakened the … potato frittata smitten kitchenA discontinuity in geotechnical engineering (in geotechnical literature often denoted by joint) is a plane or surface that marks a change in physical or chemical characteristics in a soil or rock mass. A discontinuity can be, for example, a bedding, schistosity, foliation, joint, cleavage, fracture, fissure, crack, or fault plane. A division is made between mechanical and integral discontinuities. Discontinuities may occur multiple times with broadly the same mechanical characteristics in a … potato dauphinoise jamie oliverWebtive to the surrounding rock mass (Bell, 1993, p. 37; Brady and Brown, 1993, pp. 52 53; Priest, 1993, p. 1; Hudson and Harrison, 1997, p. 20). ... host rock, for example, that are stronger and/or stiffer than their surroundings might not be considered as a discontinuity by a rock engineer. Pollard and Segall (1987) defined a discontinuity as ... potato hill killerWeb12 Nov 2024 · To enrich with data analysis, this crucial and controversial task, this paper analyses six boreholes data (specimens) from two different rock masses (samples). It … potato haiku