strength of the rock mining amp metallurgy

Estimating the strength of rock materials | Journal of the …

A practical approach for estimating the strength behaviour of rock materials is presented. The demand for data on rock properties in engineering design is considered, and it is shown that, based on the trends observed in the South African mining industry during the last twenty years, simple and easy-to-use methods for the estimation of the uniaxial and …

Numerical Simulation of Laboratory Strength Tests Using a …

Heterogeneity and discontinuity significantly affect rock strength. For accurate stability prediction, intact rock behavior is imperatively included in rock mass behavior. However, past research largely used arbitrary scaling approaches to produce rock strength. This paper considers a stochastic approach in order to determine the …

Estimating the strength of rock materials

It is shown that the uniaxial compressive strength of rock can be conveniently determined from the point-load strength index, which is obtained underground on unprepared rock …

Prediction of Uniaxial Compressive Strength of Rocks from …

Rock engineering tasks like tunnelling, dam and building construction, and rock slope stability rely heavily on properly estimating the rock's uniaxial compressive strength (UCS), a crucial rock geomechanical characteristic. As high-quality specimen are not always possible, scientists often estimate UCS indirectly. The primary objective of …

Empirical Strength Criterion for Rock Masses | Journal of the

An empirical strength criterion for rocks and rock masses is proposed. The nonlinear criterion includes the uniaxial compressive strength of the intact rock material and …

Crushing Strength Of The Rock Mining Metallurgy

Rock crushing machine description: Rock crushing machine is engaging in crushing various rocks and stones with comprehensive strength not higher than 320 MPa into fine and micro fine powders, is widely used in metallurgy, mining, chemical, cement, coal, sand-making, coal gangue, construction, refractory materials and ceramic industries.

Classification Support Technology for Roadways in Deep Broken Soft Rock

This paper addresses the surrounding rock control problem of deep roadways in broken soft rock. The 21914 working face haulage roadway in the Zhangshuanglou coal mine was taken as a case study. The deformation characteristics and failure mechanisms of the roadway surrounding rock were analysed via theoretical …

Examining the Effect of Natural Fractures on Stone Mine Pillar Strength …

The synthetic rock mass (SRM) approach and discrete fracture network (DFN) model, generated from the field surveys, are novel methodologies to study fracture rock mass behavior. In this paper, SRM and DFN methodologies were used to understand the influence of natural fractures on the mechanical response and failure mechanisms of …

A Note On the Strength of Flint Particles | ISRM Congress

ABSTRACT. Data are presented from two sites in southeast England, where problems were encountered in tunnelling through ground containing flint. In response to the difficulties, substantial laboratory testing programmes were initiated to determine the strength of the flints. It is shown that the strength varies very considerably, even within …

[PDF] rock temperatures and geothermal

Semantic Scholar extracted view of " rock temperatures and geothermal gradients in the Bushveld Complex" by M.Q.W. Jones. ... Mining, Metallurgy & Exploration. ... Expand. PDF. Save. Revisiting factors contributing to the strength of cemented backfill support system: A review. N.M. Chiloane F. Mulenga. Engineering, …

Estimating the modulus of elasticity of the rock material …

While the values of uniaxial compressive strength The Journal of The Southern African Institute of Mining and Metallurgy Sept_47-52:Template Journal 11/10/08 11:26 AM Page 623 Estimating the modulus of elasticity of the rock material compressive strength and unit weight values except for those of the Dolayoba formations.

A geomechanics classification system for the rating of …

The mining rock-mass rating (MAMA) classification system was introduced in 1974 as a development of the CSIA ... It is also possible to use the ratings (AMA) in the determination of empirical rock-mass strength (AMS) and then ... @ The South African Institute of Mining and Metallurgy, 1990. SA ISSN 0038-223X/3.00 + 0.00. Paper received 3rd ...

Rock Slope Engineering | Third Edition | Evert Hoek, …

This classic handbook deals with the geotechnical problems of rock slope design. It has been written for the non-specialist mining or civil engineer, with worked examples, design charts, coverage of more detailed analytical methods, and of the collection and interpretation of geological and groundwater information and tests for the …

Fracture of anisotropic rock | Journal of the Southern …

Home Journal of the Southern African Institute of Mining and Metallurgy Vol. 64, No. 10. Open Access. Fracture of anisotropic rock . E. Hoek; E. Hoek. Search for more papers by this author . Affiliations. 1 Rock Mechanics Division, National Mechanical Engineering Research Institute ... anisotropic rock; triaxial strength tests; Griffith's ...

Logging the mechanical character of rock

The strength of rocks and soil is a crucial design parameter in engineering projects, and it can be determined through various test methods such as uniaxial …

Rock-Bolt Support

The rock-bolt support theory mainly includes the suspension theory (Fig. 2a), composite beam theory (Fig. 2b), combined arch (compression arch) theory (Fig. 2c), and the maximum horizontal stress theory, and strength enhancement theory of surrounding rock supported by roadway bolts, which developed later.According to the suspension theory, …

Evaluation of the Rock Burst Intensity of a Cloud Model …

Rock burst has always been a major problem in deep underground engineering with high stress, and rock burst strength evaluation has become an important research topic. To effectively predict the rock burst hazard in underground rock mass engineering, a cloud model (CM) rock burst intensity evaluation method based on the …

Design Aspects Governing Disc Cutters and Cutterheads of Hard Rock …

Henri-Joseph built the first TBM in 1846 to dig the Frejus Rail tunnel between France and Italy through the Alps. In the early stages, it was only used for soft rock formations like potash and coal mines [], but the modern TBM can excavate through very hard and abrasive rock.Hard rock TBM tunnelling refers to tunnelling through a high …

Estimating Pillar Strength for Rock Salt Mines of the Salt …

This research proposes empirical models to estimate pillar strength by adopting multilinear regression and artificial neural network approaches for rock salt mines of the Salt Range, Punjab, Pakistan. The field data of a total of 168 pillars was collected from three (03) selected rock salt mines being operated by Pakistan Mineral …

Metallurgy: The Study of Metals and Their Properties

Metallurgy involves studying how metals behave and using that understanding to manipulate and shape them into various forms. ... part of the field is extracting metals from their natural sources, such as ores. An ore is a naturally occurring rock or mineral that contains a valuable material, such as metal or gemstones, which …

Fracture of Anisotropic Rock

Journal of the South African Institute of Mining and Metallurgy Volume 64, Pages 501-518, No. 10, May 1964. Fracture of Anisotropic Rock 2 23 ... Most of the published research on anisotropic rock is of an experimental nature1, 2, ... Results of triaxial strength tests on a South African slate are in good agreement with the

(PDF) A Critical Review of the Stability Graph Method

The stability graph was introduced in 1981 by Mathews and co-workers in Golder Associates. This period coincided with the shift from open pit mining to underground bulk or mass mining in North ...

Rock mass properties for underground mines

tm is the 'tensile' strength of the rock mass. In order to use the Hoek-Brown criterion for estimating the strength and deformability of jointed rock masses, three 'properties' of the rock mass have to be estimated. These are 1. the uniaxial compressive strength s ci of …

Home | Mining, Metallurgy & Exploration

Mining, Metallurgy & Exploration is SME's journal covering topics related to mining, mineral and metallurgical processing, and geology and exploration. Flagship journal of …

Underground Excavations in Rock | E.T. Brown, E. Hoek

Underground Excavations in Rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. monograph. Skip to main content. ... Strength of rock and rock masses . Abstract . chapter 7 | 61 pages Underground excavation failure mechanisms .

Logging the mechanical character of rock

Transactions of the Institution of Mining and Metallurgy, Section A: Mining Technology 80(770):1-9; ... The above researchers also recommended that rock strength can be derived by point load test.

A New Method for Intuitively Reflecting the Deterioration

where γ e is the cumulative shear strain in the elastic stage. If the surrounding rock enters the plastic stage, γ e is equal to the shear strain at the elastic limit of the surrounding rock. According to the load-bearing state, in the case of minor deformation, rock mass strain can include elastic strain and plastic strain; total strain is …

Using Rock Geomechanical Characteristics to Estimate Bond …

In this study, rock geomechanical properties including uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), point load strength index (Is (50)), and …

Aims and scope | Mining, Metallurgy & Exploration

The aim of this international peer-reviewed journal of the Society for Mining, Metallurgy & Exploration (SME) is to provide a broad-based forum for the exchange of real-world and theoretical knowledge from academia, government and industry that is pertinent to mining, mineral/metallurgical processing, exploration and other fields served by the Society.