About Stresses in a Contour Points in a Single Underground Mines of Different Cross Sections, Subject to an Overall Uniform Pressure

Bogomolov, Aleksandr; Богомолова, Оксана; Ushakov, A. N.

doi:10.15593/2224-9826/2018.3.06

Cited by 5 publications

(3 citation statements)

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“…Taking into account the results of [16], note that the extreme values of the function σ(θ) can be obtained from the following equations sin θ 0, …”

Section: ( )mentioning

confidence: 99%

“…where , , , A B C D -are real numbers; this function maps the interior of the unit circle ζ 1  to the exterior of an infinite simply connected region, the boundary of which is a family of simple closed curves. The mapping function (1) was previously used by the authors of this article in [14][15][16] when solving problems related to the study of stresses on the contour of mine workings and to determine the permissible laying depth of horizontal workings with a given cross-sectional configuration.…”

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confidence: 99%

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Determination of Stress at the Contour Points of Single Underground Horizontal Mine Workings, Subject to Uniform Pressure, and Calculation of Their Permissible Laying Depth

Bogomolov

Ushakov

Богомолова

2021

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The results of constructing the contour of an underground horizontal mine working of given dimensions and geometric structure based on the method proposed by the authors are presented, the stress state at the points of the contours of the working, the cross-sections of which have the shape of a vault with inclined walls and an ellipse, are given, the permissible laying depths are determined at given values of uniform pressure applied at the points of their contours. The criterion for determining the permissible laying depth is the condition that there are no points on the contours of the workings at which the normal tangential stresses exceed the tensile and compressive strength of the enclosing rock.

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“…Taking into account the results of [16], note that the extreme values of the function σ(θ) can be obtained from the following equations sin θ 0, …”

Section: ( )mentioning

confidence: 99%

mentioning

confidence: 99%

Determination of Stress at the Contour Points of Single Underground Horizontal Mine Workings, Subject to Uniform Pressure, and Calculation of Their Permissible Laying Depth

Bogomolov

Ushakov

Богомолова

2021

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“…The set of core factors includes the strength characteris tics and deformation indicators, which include elastici ty, plasticity and brittleness. Homogeneity and isotropy are also being studied [3].…”

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confidence: 99%

Developing technological schemes of driving workings with controlled resistance of contours

Dyomin¹,

Batyrkhanova²,

Tomilov³

et al. 2019

NVNGU

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Mine workings represent a technological hazard in the absence of devices for their safe development. Purpose. Reinforcement of the contours of mine workings as a safety measure of developing mine workings. methodology. The study algorithm is represented in the sequence of stages considering the depth of the excavation, the orientation of the excavation relative to the coal seam, the structure of the coalbearing layer, the mechanical characteristics of the enclosing array in the preliminary and limit state of typical cross section of the development, the construction and technological characteristics of the supports. Findings. The study offers data that indicate that if the development area belongs to a flooding area, then the re installation of finger bars can be less effective by more than 40%. Field studies have shown that when the second level roof bolting is installed in workings, which are used repeatedly, then they are most likely to have deformed parts in the roof and sides. Originality. For the first time mathematical models for determining the stability of mine workings are used, as well as models that allow extending the contours of mine workings safely. The requirements for materials that allow carry ing out reinforcement of contours considering the structure and technological scheme of the applied technology were determined. This article presents a mathematical model, the approbation and verification of the data obtained at the experimental location. Observations were made regarding the state of workings anchored by roof bolting in the vicin ity of geological faults in the zone of influence of high rock pressure of Kostenko, Saranskaia, and Abaiskaia Mines of JSC "Arcelor Mittal Temirtau". Effects of primary stresses on opening strength are determined. Practical value. The acquired technology can be used in a controlled environment for the development of mine workings, which have signs of residual capacity and can be developed at better rates and volumes. Testing the method of automated calculation of anchoring parameters and the implementation of research results can improve the tech nological schemes of the working. Consistencies in calculating the stability of mine workings from the parameters of anchoring was achieved.

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Analysis of the Stress State at the Contours of Underground Horizontal Mine Workings Exposed to Uniform Pressure and Determination of the Safe Laying Depth

Bogomolov

Богомолова

Ushakov

2022

Soil Mech Found Eng

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About Stresses in a Contour Points in a Single Underground Mines of Different Cross Sections, Subject to an Overall Uniform Pressure

Cited by 5 publications

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Determination of Stress at the Contour Points of Single Underground Horizontal Mine Workings, Subject to Uniform Pressure, and Calculation of Their Permissible Laying Depth

Determination of Stress at the Contour Points of Single Underground Horizontal Mine Workings, Subject to Uniform Pressure, and Calculation of Their Permissible Laying Depth

Developing technological schemes of driving workings with controlled resistance of contours

Analysis of the Stress State at the Contours of Underground Horizontal Mine Workings Exposed to Uniform Pressure and Determination of the Safe Laying Depth

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