scholarly journals DETERMINATION OF CHANGES IN PARAMETERS OF NATURAL DISTRIBUTION OF STRESSES ON THE STEEP SIDE SURFACES OF THE MINE FIELD BY MEASURED HORIZONTAL DISPLACEMENTS OF THE DAY SURFACE

2018 ◽  
pp. 157-164
Author(s):  
A.S. Kravchuk ◽  
A.F. Smalyuk ◽  
S.I. Slavashevich ◽  
V.A. Misnikov
Keyword(s):  
Natural Distribution ◽  
Mine Field ◽  
Horizontal Displacements ◽  
Distribution Of Stresses

scholarly journals Gas-dynamic characteristics of the host rocks of Mir pipe mine field deep horizons

2021 ◽  
Vol 44 (3) ◽  
pp. 293-300
Author(s):  
S. A. Yannikova ◽  
A. M. Yannikov
Keyword(s):  
Chemical Composition ◽  
Dynamic Characteristics ◽  
Field Experiments ◽  
Industrial Safety ◽  
Mountain Range ◽  
Mine Field ◽  
Fluid Saturation ◽  
Gas Dynamic ◽  
Under Construction

The purpose of the research is to study the gas-dynamic characteristics of deep horizons of the Mir pipe mine field to ensure industrial safety under construction and production resumption at the field. The study is based on the interval field experiments carried out during drilling and subsequent study of the core. The main gas-dynamic parameters of the deep horizons of the field were studied during the drilling of pilot wells that enabled to perform interval determination of the flow rates of formation gases using packers and complex research equipment, gas sampling for the determination of chemical composition of gases, and gas logging. The conducted works resulted in the formulation of the gas-dynamic characteristic of the Tolbachan formation within the mine field of the Mir pipe. Reservoir intervals were identified and the nature of their fluid saturation was determined. The chemical composition of formation gases was clarified and gas release nature and intensity were studied both under drilling and interval testing. The result of the research carried out was identification of zones with different fluid manifestations, as well as comparison of the field under investigation with the previously studied International pipe. The results of the conducted research works will form the basis for performing design forecast calculations, as well as for making the main design decisions under construction of capital mine workings, especially in terms of advanced degassing of the mountain range. Consideration of the zones identified within the Tolbachan formation, which feature different nature of fluid saturation, will allow to take into account and minimize possible adverse factors.

scholarly journals Determination of cracking causes in building structural elements

2021 ◽  
Vol 258 ◽  
pp. 09038
Author(s):  
Valentina Halushko ◽  
Alexandr Meneiliuk ◽  
Stanislav Kyryliuk
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Normal Operation ◽  
Theoretical Problem ◽  
Structural Elements ◽  
Regulatory Requirements ◽  
Different Depths ◽  
Base Soil ◽  
Horizontal Displacements

The article deals with the problems of buildings built many years ago, in which current and major repairs were not carried out in an appropriate manner. At the same time, buildings experience various deformations, such as yield, heel, subsidence, deflections, bends, twists, distortions, horizontal displacements. The survey of residential buildings built in the 80s is described and the analysis of the results of the survey of one of these buildings is carried out. The theoretical problem of the distribution of moisture in depth and various degrees of soil moisture has been solved. The reasons for the appearance of cracks in structures and cracks between individual building elements are also determined. The survey of a 9-storey brick residential building, built in the late 80s, which is in the period of normal operation, is considered. At the same time, the considered building is operated with significant deviations from regulatory requirements. The causes of cracks in individual structures and cracks between individual elements in the building are found. The problem of the distribution of moisture in depth with local soaking is solved on the basis of a numerical method, and the character of soil moistening at different depths with different degrees of moistening and characteristics of the base soil is obtained.

Determination of Thermal Stresses in Three-Ply Laminates

1955 ◽  
Vol 22 (2) ◽  
pp. 190-192
Author(s):  
A. J. Durelli ◽  
C. H. Tsao
Keyword(s):  
Maximum Stress ◽  
Thermal Stresses ◽  
Polyvinyl Butyral ◽  
Longitudinal Stress ◽  
Failure Characteristics ◽  
Temperature Changes ◽  
New Methods ◽  
Photoelastic Investigation ◽  
Distribution Of Stresses

Abstract The knowledge of the distribution of stresses produced in three-ply laminates when the temperature changes is very important in the design of airplane windshields. This paper gives the result of a photoelastic investigation on the thermal stresses produced in a three-ply laminate consisting of glass, polyvinyl butyral, glass, when the temperature drops slowly from 70 to −20 F. The maximum stress has been found to be about six and one-half times the average longitudinal stress at the mid-section of the glass. Failure characteristics of the laminates check well with these findings. No new methods have been developed in the paper; however, the presently available techniques had to be applied carefully to determine maximum tensile stresses of about 1300 psi on the interface, at a distance of about 0.007 in. from the edge, at low temperature.

scholarly journals Soil characteristics of natural silver linden (Tilia tomentosa Moench) populations

BioResources ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 9588-9600
Author(s):  
Salih Parlak ◽  
Erdem Tetik
Keyword(s):  
Sandy Loam ◽  
Natural Populations ◽  
Soil Characteristics ◽  
Clay Loam ◽  
Natural Distribution ◽  
Factors Affecting ◽  
Tilia Tomentosa ◽  
Shadow It ◽  
Physical And Chemical

Studies regarding the determination of the ecological characteristics of the natural distribution areas of the silver linden (Tilia tomentosa Moench) are limited. It is of great importance to select areas with similar natural cultivation characteristics in the plantations established for flower or timber production. Physiographical factors affecting these forests were explored to determine the physical and chemical characteristics of the soil. The soil samples were collected from three natural populations, and a total of 43 samples were examined in terms of aspect, elevation, declivity position, and slope. It was determined that the natural linden populations expanded between the altitudes of 0 m and 400 m and 88% of the populations were denser in aspects with shadow. It was found that 91% of the soil was in the class of “deep to very deep”, 61% showed an expansion in sandy clay loam soils, and 30% showed an expansion in sandy loam soils. Average soil pH ranged between 5.6 and 6.6. The soils were found to be salt-free and slightly limy. In terms of the organic carbon amount, the soils were classified as medium.

MINING-INDUCED SURFACE HORIZONTAL DISPLACEMENT: THE CASE OF BW PROSPER HANIEL MINE / ANALIZA PRZEMIESZCZEŃ POZIOMYCH POWIERZCHNI TERENU WYWOŁANYCH PODZIEMNĄ EKSPLOATACJĄ GÓRNICZĄ NA PRZYKŁADZIE KOPALNI BW PROSPER HANIEL

2013 ◽  
Vol 58 (4) ◽  
pp. 1037-1055 ◽  
Author(s):  
Krzysztof Tajduś
Keyword(s):  
Coal Mine ◽  
Underground Mining ◽  
Horizontal Displacement ◽  
Factor B ◽  
Complex Study ◽  
Displacement Factor ◽  
Horizontal Displacements

Abstract The paper presents a wide-ranged analysis of horizontal displacements in the region of underground mining exploitation. Initially, various theories pertaining to the determination of mining-induced horizontal displacement are discussed, followed by a complex study on horizontal displacements measured for a selected example region of the German coal mine BW Prosper Haniel, as well as the determination of displacement factor B.

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