Ore debris collapses from the undercut and pours through the funnels and into the raises, where special front-end loaders collect it. In theory, no additional blasting or construction is henceforth required. As the funnels empty, the broken ore continues to drop away from the “roof” above the undercut. Unsupported, the ore roof collapses, feeding more material into the funnels. This process progresses until the ore body is exhausted. In practice, the ore body itself usually requires continued blasting to reduce it to manageable size pieces.