Blasting system and a method of explosive material charging

Abstract

The invention concerns a blasting system (1) configured for explosive material charging in a borehole (3). The system (1) comprises a detonator support device (5) configured to be inserted into the borehole (3) by means of a charging hose (7); a main body (9) of the detonator support device (5) comprises a channel (8) oriented along a main body centre line (CL) extending along the borehole extension during said explosive material charging; an openable cover device (14) covering the channel (8) is configured to come into contact with the charging hose (7) in motion for pushing the main body (9) along the borehole (3), wherein the charging hose (7) in motion is configured to open the openable cover device (14) whilst a stopping arrangement (13) stops the main body (9).The invention also concerns a method of explosive material charging in a borehole (3) by means of the blasting system (1).

1 . (canceled) 
     
     
         2 . A detonator support device configured for explosive material charging in a borehole, the detonator support device comprising:
 a main body, the main body comprising:
 a first end and a second end, the first end facing an entrance of the borehole, and the second end facing a deep end of the borehole; and 
 a channel oriented along a center line of the main body, the channel comprising an openable cover; and 
   a detonator unit compartment configured to support a detonator unit, the detonator unit compartment positioned adjacent a side wall of the detonator support device.   
     
     
         3 . The detonator support device of  claim 2 , comprising a stop coupled to the detonator support device. 
     
     
         4 . The detonator support device of  claim 3 , wherein the stop includes a dimension larger than a diameter of the borehole. 
     
     
         5 . The detonator support device of  claim 2 , comprising a backflow prevention valve configured to inhibit discharge of explosive material. 
     
     
         6 . The detonator support device of  claim 5 , wherein the backflow prevention valve is configured to provide a closing of a flap member of the backflow prevention valve subsequent to withdrawn of a charging hose from the backflow prevention valve. 
     
     
         7 . The detonator support device of  claim 6 , wherein the flap member of the backflow prevention valve is spring biased for providing said closing, preventing the explosive material above the backflow prevention valve to stream downward. 
     
     
         8 . The detonator support device of  claim 2 , comprising a charging hose. 
     
     
         9 . The detonator support device of  claim 8 , wherein the charging hose configured to open the cover from a closed position to an open position. 
     
     
         10 . The detonator support device of  claim 2 , wherein the openable cover comprises an extension configured to extend in an orientation substantially perpendicular to the center line of the main body. 
     
     
         11 . The detonator support device of  claim 2 , wherein the detonator unit compartment comprises a compartment opening, the compartment opening facing a deep end of the borehole. 
     
     
         12 . The detonator support device of  claim 2 , wherein the detonator unit compartment is configured to exhibit a prolongation extending parallel with a prolongation of the channel. 
     
     
         13 . The detonator support device of  claim 2 , further comprising a detonation cord member. 
     
     
         14 . The detonator support device of  claim 13 , wherein the detonation cord member is one of shock tube or detonation cord. 
     
     
         15 . The detonator support device of  claim 13 , wherein the detonation cord is coupled to the detonator unit and runs from the detonator unit positioned in the detonator unit compartment. 
     
     
         16 . The detonator support device of  claim 2 , wherein the main body comprises a resilient member extending circumferentially around the main body. 
     
     
         17 . The detonator support device of  claim 16  wherein the resilient member is arranged to an outer peripheral surface of the main body and around the center line of the main body. 
     
     
         18 . The detonator support device of  claim 16 , wherein the resilient member runs discontinuously around the main body. 
     
     
         19 . The detonator support device of  claim 2 , wherein the openable cover is movable from an open position to a closed position. 
     
     
         20 . A detonator support device configured for use in a blasting system in a borehole, comprising:
 a main body comprising a first end and a second end, the first end facing an entrance of the borehole, and the second end facing a deep end of the borehole;   a detonator unit compartment configured to support a detonator unit; and   a backflow prevention valve positioned at the first end of the main body, the backflow prevention valve comprising a biasing member configured to move the backflow prevention valve from an open position to a closed position.   
     
     
         21 . The detonator support device of  claim 20 , further comprising a splitable cover member positioned at the second end of the main body.