The influence of normal fault on initial state of stress in rock mass

Tajduś, A.; Cała, M.; Tajduś, Krzysztof

doi:10.1515/sgem-2016-0012

Cited by 11 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The second type of specific infrastructure elements are tunnels, in which the railway surface also affects the structure of tunnel facility. Problems related to the exploitation of the surface in tunnels were described in [32].…”

Section: Literature Reviewmentioning

confidence: 99%

Finite Element Method in Assessing Strength Properties of a Railway Surface and Its Elements

2019

View full text Add to dashboard Cite

Development of railway infrastructure at the turn of the 20th and 21st centuries, as well as the speeds of trains in passenger and freight traffic are the result of improving the structure of modern rail vehicles and railway infrastructure optimization. The structure of the railway surface, which enables high speeds and transferring ever greater loads and pressures of up to 25–30 t/vehicle axis, must meet very strict strength and durability requirements. This paper discusses mathematical and numerical tools used in simulation and experimental tests of railway surfaces, as well as its selected elements. Issues addressed in this paper concern, among others, modeling of the railway track, calculations related to its static and dynamic loading, and simulation of the technological process of selected elements of railway turnout. Selected results of the simulation tests on numerical models showing their behavior under different loads are also presented in this paper. The concept of symmetry is included in the possibility of applying the method described in the article both for testing other sections of railway lines, as well as for testing other elements in which stresses occur.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Finite Element Method in Assessing Strength Properties of a Railway Surface and Its Elements

2019

View full text Add to dashboard Cite

show abstract

“…ey determined at what W/H ratio and interface friction the mode of failure changes from violent to nonviolent [8]. Tajduś et al determined the effect of friction coefficient on the state of stress, which occurs in the vicinity of a normal fault [9]. Ito et al revealed the mechanism of fault slip-weakening frictional behavior [10].…”

Section: Introductionmentioning

confidence: 99%

Influencing Factor Analysis on the Anomalously Low‐Friction Effect in the Block Rock Mass

Yi-shan

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

According to the instability failure of the deep rock mass, a superposition block model of anomalously low-friction effect was established. The numerical results were compared with the previous experiment, which verifies the feasibility and effectiveness of the simulation. A vertical impact and confining pressure were applied to the superimposed block model, and a horizontal static force was applied to the working block (the third block). This study aimed to determine the influence rules of vertical impact energy, confining pressure, and block lithology on the horizontal displacement of the working block and normal force on the contact surface. The results show that, with the increase of the vertical impact energy, the horizontal residual displacement of the working block increases linearly, and the horizontal displacement amplitude increases by the exponential function. The minimum normal force on the contact surface decreases linearly. As the confining pressure increases, the horizontal residual displacement of the working block decreases logarithmically, and the horizontal displacement amplitude decreases linearly. The minimum normal force on the contact surface increases linearly. The horizontal residual displacement and displacement amplitude of the working block in the coal-rock combination are 1.51 times and 1.63 times of the rock mass, and the minimum normal force of the former is 0.84 times of the latter. Coal-rock combination is more prone to the anomalously low-friction effect than the rock mass.

show abstract

“…New types of bolt support constructions are designed to absorb an increasing amount of energy and to better cooperate with the rock mass. With regard to the mechanism of taking over the loads, bolt supports can be divided into 3 types ( [6]- [8], [10], [11], [13], [15], [18], [19], [24], [26]). a) rigid bolts -with sufficient strength, undergoing damage when there is a load close to the breaking of the rod bolt, characterized by a small possibility of deformation, b) yielding bolts -capable of moving large deformation but having low load-bearing capacity, c) absorbing bolts -characterized by a high load carrying capacity and the ability to transfer large displacements and deformations.…”

Section: Introductionmentioning

confidence: 99%

Application of Long Expansion Rock Bolt Support in the Underground Mines of Legnica–Głogów Copper District

Skrzypkowski

Korzeniowski

Zagórski

et al. 2017

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

Abstract:In the underground mines of the Legnica-Głogów Copper District (LGOM) the main way to protect the room excavation is the use of a rock bolt support. For many years, it has proven to be an efficient security measure in excavations which met all safety standards and requirements. The article presents the consumption of the rock bolt support in the Mining Department "PolkowiceSieroszowice" in the years 2010-2015 as well as the number of bolt supports that were used to secure the excavations. In addition, it shows the percentage of bolt supports that were used to conduct rebuilding work and cover the surface of exposed roofs. One of the factors contributing to the loss of the functionality of bolt supports is corrosion whose occurrence may lead directly to a reduction in the diameter of rock bolt support parts, in particular rods, bearing plates and nuts. The phenomenon of the corrosion of the bolt support and its elements in underground mining is an extremely common phenomenon due to the favorable conditions for its development in mines, namely high temperature and humidity, as well as the presence of highly aggressive water. This involves primarily a decrease in the capacity of bolt support construction, which entails the need for its strengthening, and often the need to perform the reconstruction of the excavation.The article presents an alternative for steel bearing plates, namely plates made using the spatial 3D printing technology. Prototype bearing plates were printed on a 3D printer Formiga P100 using the "Precymit" material. The used printing technology was SLS (Selective Laser Sintering), which is one of the most widely used technologies among all the methods of 3D printing for the short series production of the technical parts of the final product.The article presents the stress-strain characteristic of the long expansion connected rock bolt support OB25 with a length of 3.65 m. A rock bolt support longer than 2.6 m is an additional bolt support in excavations, and it is increasingly frequently used to reinforce roofs and in rebuilding the underground mines of KGHM Polish Copper S.A. In order to conduct the laboratory tests that are most suitable for the mine conditions, and yet are carried out on a laboratory test facility, the Authors used a steel cylinder with an external diameter of 102 mm and a length of 600 mm, which was filled with a core of rock (dolomite) from the roofs of the mine workings.In addition the maximum load that took over the bolt support made of rods and connected with sleeves was determined. For the initial tension, the elastic and plastic range of the maximal displacements, which were measured by the rope encoder, were determined. The statical tests of the expansion rock bolt support were carried out at the laboratory of the Department of Underground Unauthenticated Download Date | 5/12/18 3:35 PM K. SKRZYPKOWSKI et al. 48 Mining in simulated mine conditions. The test facility enables the study of the long bolt rods on a geometric scale of 1:1 for the different ways of...

show abstract

The influence of normal fault on initial state of stress in rock mass

Cited by 11 publications

References 6 publications

Finite Element Method in Assessing Strength Properties of a Railway Surface and Its Elements

Finite Element Method in Assessing Strength Properties of a Railway Surface and Its Elements

Influencing Factor Analysis on the Anomalously Low‐Friction Effect in the Block Rock Mass

Application of Long Expansion Rock Bolt Support in the Underground Mines of Legnica–Głogów Copper District

Contact Info

Product

Resources

About