EP 1144943 A4 20020522 - METHOD AND APPARATUS FOR CHARGING A HOLE

Title (en)

METHOD AND APPARATUS FOR CHARGING A HOLE

Title (de)

VERFAHREN UND VORRICHTUNG ZUM LADEN VON BOHRLÖCHERN

Title (fr)

PROCEDE ET APPAREIL DE CHARGEMENT D'UN TROU DE FORAGE

Publication

EP 1144943 A4 20020522 (EN)

Application

EP 99966764 A 19991214

Priority

AU 9901107 W 19991214
AU PP769998 A 19981214
US 13443899 P 19990517

Abstract (en)

[origin: WO0036364A1] A method of charging hole (12) drilled in rock or concrete (10), the method including inserting a quantity of energetic material (14) on or near the bottom (16) of hole (12). Lead (28) connects initiator (18) with an initiation source at ground level. Hole (12) is filled with stemming material (20) to a level (L) and plug (22) is positioned to rest on stemming material (20). Lead (28) threads through plug (22) via a slot, recess or passage. Mass (30) such as the bucket of excavator (32) and plug (22) prevent stemming material (20) from being blown out of hole (12) when energetic material (14) is detonated. The risk of collar area (C) being fragmented and energised to produce fly rock is reduced since the length of plug (22) is commensurate with the length of collar area (C). Plug (22) and stemming material (20) can be replaced by a stemming bar, with the stemming bar attached directly to energetic material (14).

IPC 1-7

E21C 37/16; F42D 1/08; F42D 1/18

IPC 8 full level

F42D 1/08 (2006.01); F42D 1/18 (2006.01)

CPC (source: EP)

F42D 1/08 (2013.01); F42D 1/18 (2013.01)

Citation (search report)

[XY] DE 628934 C 19360420 - GEORG MANDEL
[Y] US 1616048 A 19270201 - HOLT VICTOR L
[A] EP 0109067 A1 19840523 - KRUPP GMBH [DE]
[A] DE 949633 C 19560920 - OTTO LYNKER G M B H
[A] US 2812712 A 19571112 - THOMAS ASHURST
[A] US 1491661 A 19240422 - VIDO BAYAT
[A] US 1479070 A 19240101 - EDWARD HARRIS WILLIAM
[A] US 1896817 A 19330207 - HEITZMAN RICHARD J
See references of WO 0036364A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 0036364 A1 20000622; CA 2360771 A1 20000622; CN 1338038 A 20020227; EP 1144943 A1 20011017; EP 1144943 A4 20020522; HK 1040762 A1 20020621; JP 2002532678 A 20021002; NO 20012883 D0 20010611; NO 20012883 L 20010724

DOCDB simple family (application)

AU 9901107 W 19991214; CA 2360771 A 19991214; CN 99816176 A 19991214; EP 99966764 A 19991214; HK 02102560 A 20020404; JP 2000588562 A 19991214; NO 20012883 A 20010611