US2012017792A1PendingUtilityA1

Method of blasting

Assignee: OSTERMAN RAUFPriority: Feb 10, 2009Filed: Feb 9, 2010Published: Jan 26, 2012

Est. expiryFeb 10, 2029(~2.5 yrs left)· nominal 20-yr term from priority

Inventors:Rauf Osterman

E21C 37/16F42D 1/055

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Claims

Abstract

A method of blasting a segment in a ground mass, the method comprising: forming an array of holes around a central portion of the ground mass segment; placing explosives in the array of holes; and detonating the explosives.

Claims

exact text as granted — not AI-modified

1 . A method of blasting a segment in a ground mass, the method comprising:
 forming an array of holes around a central portion of the ground mass segment;   placing explosives in the array of holes; and   detonating the explosives.   
     
     
         2 . A method according to  claim 1  wherein forming the array of holes comprises forming six holes. 
     
     
         3 . A method according to  claim 1  or  claim 2  wherein the holes extend substantially parallel to one another. 
     
     
         4 . A method according to any one of the preceding claims wherein the holes converge on each other. 
     
     
         5 . A method according to any one of the preceding claims wherein each hole is at an angle of one degree to the direction in which the hole would have extended had the holes extended parallel to one another. 
     
     
         6 . A method according to any one of the preceding claims for removal of ground material from the ground mass.

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