Yieldable cambered arch support assembly

An arch support assembly for withstanding the effects of rock burst in underground mines, which includes a spaced aligned series of arch supports, each support having a spaced pair of upright side support columns with an upwardly cambered cap beam arch having opposite ends therefore transversely meeting and secured respectively to the upper ends of the side columns at an obtuse angle. The arch supports are rigidly tied together and provided with a roof supported by the cap beams to provide in combination an arch support assembly. A yielding connection is provided between the upright side columns and the cap beam ends whereby the cambered cap beams are permitted to flex downwardly under an impact load on the roof and the cap beam ends are thereby permitted to extend transversely a controlled limited amount relative to the upright side columns under a yieldable interference friction securement