MINE STOPPING PANEL AND METHOD OF MANUFACTURE

摘要

A mine stopping panel and method of making it are disclosed. In one embodiment, the panel includes first and second channel-shaped panel members having a telescoping sliding fit one inside the other. An elongate end cap fitted in the first panel member. One or more connections between the first panel member and the end cap hold the end cap against movement relative to the first panel member when an extending force is applied to the end cap tending to telescopically extend the first panel member relative to the second panel member. At least one device on the end cap is configured for engagement with the first panel member to resist telescopic movement of the first end cap relative to the first panel member when a contracting force is applied to the first end cap. Other improved mechanisms for resisting contracting forces are disclosed.

主权项

1. A mine stopping panel comprising
first and second elongate panel members of channel shape, each panel member having a web, first and second flanges at opposite sides of the web, and in-turned lips at outer edges of the flanges, said first and second panel members having a telescoping sliding fit one inside the other along an axis extending lengthwise of the panel members, a first end cap extending between the first and second flanges of the first panel member on an inside surface of the web of the first panel member, a first set of one or more louver connections between the first panel member and the first end cap holding the first end cap against movement relative to the first panel member when an extending force is applied to the first end cap tending to telescopically extend the first panel member relative to the second panel member in a first direction along said axis, and at least one first device on the first end cap configured for engagement with the first panel member to resist telescopic movement of the first end cap relative to the first panel member when a contracting force is applied to the first end cap tending to telescopically contract the first panel member relative to the second panel member in a second direction along said axis opposite said first direction.