| 摘要 |
Materials including rock and compositions containing rock aggregates are subjected to a fluid jet cutting operation utilizing a first stage high-temperature, high-flux heat source and a second stage high-pressure hydraulic jet of water. The preferred heat source is a flame. In the first stage, the flame impinges upon a surface to be cut and material at the surface is rapidly heated by the flame to a state of massive incandescence. As heat penetrates and the heat front advances, there is also produced beneath the zone of incandescence a substrate of thermally fractured material. Fractures in the substrate define planes of weakness which extend generally parallel to the incandesced surface portions of the material.
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