发明名称 |
Method for breaking rock by directing high velocity jet into pre-drilled bore |
摘要 |
A hard compact material such as rock is broken by directing a high velocity jet of relatively incompressible fluid, such as water, into a hole which is drilled in the material to be broken. The jet is generated by a nozzle in alignment with the hole and is suddenly arrested in the hole in appropriate position with respect to adjacent free surfaces of the material. A jet stagnation pressure is created in the hole of sufficient magnitude and duration or jet repetion rate to break the material towards the free surfaces. Preferably, a secondary nozzle emits fluid for filling partially or wholly the hole prior to generating the high velocity jet by a primary nozzle.
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申请公布号 |
US4103971(A) |
申请公布日期 |
1978.08.01 |
申请号 |
US19760719246 |
申请日期 |
1976.08.31 |
申请人 |
ATLAS COPCO AKTIEBOLAG |
发明人 |
DENISART, JEAN-PAUL;EDNEY, BARRY E.;YOUNG, CHAPMAN |
分类号 |
E21C25/60;B26F3/00;B26F3/04;E21C37/06;E21C37/12;(IPC1-7):E21C37/12 |
主分类号 |
E21C25/60 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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