Open AccessDetermination of an allowable value of internal uniform pressure on the underground horisontal working contour with a trapezoidal form of its cross-section
Author(s) -
Александр Богомолов,
A. N. Ushakov,
Оксана Богомолова
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1928/1/012059
Subject(s) - contour line , intensity (physics) , rock mass classification , section (typography) , structural engineering , point (geometry) , cross section (physics) , stress (linguistics) , ultimate tensile strength , geotechnical engineering , mathematics , mechanics , geometry , geology , engineering , materials science , computer science , physics , composite material , optics , linguistics , philosophy , quantum mechanics , meteorology , operating system
The paper presents the study results of the stress state at the contour points of an underground horizontal working carried out by the methods of the complex variable theory. This study is the basis for solving the problem of determining an allowable value of the uniform pressure transmitted to the contour of the working, with predetermined values of the depth of its laying. The condition proposed by the authors of the paper is used as a criterion of strength (stability), according to which the working’s contour strength is ensured if at any point the amount of the tangential normal stress does not exceed the tensile and compressive strength of the host soil (rock), i.e. σ t ≤ σ e ≤ σ c . As a result of the solution, an assessment of the stress distribution on the contour of an underground horizontal working has been made. The working has a cross-section in the form of a curved trapezoid, which is under the action of uniform all-round stretching of a given intensity with a varying depth and various values of the host mass lateral expansion coefficient. The allowable values of the tensile internal pressure on the contour of an underground horizontal working of a trapezoidal cross-section have been determined at the given values of its depth and a constant coefficient value of the lateral expansion of the host mass μ = 0.25. The materials presented in the paper can be used when choosing the maximum or minimum allowable depth of the working used as a storage facility for liquid or gaseous hydrocarbons.