DETERMINATION OF PERMISSIBLE VALUES OF INTERNAL UNIFORM PRESSURE ON THE CONTOURS OF UNDERGROUND HORIZONTAL EXCAVATIONS OF VARIOUS CROSS-SECTIONS
The paper presents the results of a study to determine the stress state on the contours of underground horizontal workings, the cross-section of which has the form of a trapezoid, a vault with vertical walls and an ellipse with a fixed value of the large semi-major axis. The permissible values of the all-round uniform pressure applied in the points of the excavation contours at which the normal tangential stresses do not exceed the strength limits of the host rock in tension and compression, are determined for excavations of this type at different values of their depth.