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US 6,460,462 B1Granted
Method of blasting of rock mass
AssigneeRoboth Vertriebsgesellshaft mbH
InventorJochen Rosenstock
Life of this patent
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Abstract
A method of blasting rock or similar materials in surface and underground mining operations is described in which neighboring bore holes are charged with explosives and primed with detonators. The detonators are programmed with respective delay intervals according to the firing pattern and the mineralogical/geological environment and the resulting seismic velocities.
Claims10
A method of blasting rock masses or similar masses comprising:
- inserting explosive charges, each with a corresponding detonator (2), in boreholes (1), and according to which
- programming the detonators (2) and their respective time intervals with respect to one another depending on the mineralogical/geological surroundings and the resulting seismic speeds (VG) and with regard to the respective firing pattern, wherein
- influencing reciprocally successive blastings with regard to the respective detonation sequence;
- wherein detonation delays are set between the first and last boreholes, the delays corresponding to a detonation speed (horizontal detonation speed VZH) which is equal to or higher than the speed of sound in the rock to be blasted (rock speed VG) (in other words VZH≧VG).
1 more element
Dependencies are inferred from the claim text.