Abstract: Based on the characteristics of many pipe layout on the simply supported beam in no. 4 downcast air and promotion shaft of Huangling no. 1 mine, the stress mechanics model of pipe locked beam, with hosting beam, and beam of supported the 90° elbow pipe which is under the condition of the single pipe layout in mine shaft was set up. This paper obtained the force formula which was single pipe to pipe locked beam, and hosting beam, and beam of supported the 90° elbow pipe, and calculated the acting force which was each pipe to the hosting beam in no. 4 downcast air and promotion shaft. The formula which was used to unify the stress analysis method of simply supported beam under the condition of the pipe in mine shaft provided the reference.

Key words: beam of supported the 90°, elbow pipe