Determination of the magnitude of vertical rock pressure at the intersection of workings

Abstract

In places of crossed or conjugate workings, the magnitude of vertical rock pressure, as is known, increases significantly. In this case, it is not possible to use the usual method of replacing the intersection of workings with a working of an equivalent span. Shape change theory is used to determine the magnitude of this rock pressure. Equations (8) and (10) represent the equations for changing the shape of the column in the case of straight or inclined intersections of shaft structures. The maximum change in the shape of the support angle is expressed by formulas (4) and (5). The equivalent width of the intersection of shafts is determined by formulas (9) and (15).