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1. (WO1991017970) LOW LEVEL BLASTING COMPOSITION AND METHOD OF BLASTING SAME
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017970 International Application No.: PCT/CA1991/000163
Publication Date: 28.11.1991 International Filing Date: 14.05.1991
Chapter 2 Demand Filed: 05.12.1991
IPC:
C06B 45/00 (2006.01) ,C06B 47/00 (2006.01) ,C06B 47/14 (2006.01) ,E21B 43/263 (2006.01) ,F42D 1/00 (2006.01) ,F42D 1/045 (2006.01) ,F42D 1/10 (2006.01)
C CHEMISTRY; METALLURGY
06
EXPLOSIVES; MATCHES
B
EXPLOSIVE OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
45
Compositions or products which are defined by structure or arrangement of component or product
C CHEMISTRY; METALLURGY
06
EXPLOSIVES; MATCHES
B
EXPLOSIVE OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
47
Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
C CHEMISTRY; METALLURGY
06
EXPLOSIVES; MATCHES
B
EXPLOSIVE OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
47
Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
14
comprising a solid component and an aqueous phase
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
25
Methods for stimulating production
26
by forming crevices or fractures
263
using explosives
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42
AMMUNITION; BLASTING
D
BLASTING
1
Blasting methods or apparatus, e.g. for loading or tamping
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42
AMMUNITION; BLASTING
D
BLASTING
1
Blasting methods or apparatus, e.g. for loading or tamping
04
Arrangements for ignition
045
Arrangements for electric ignition
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
42
AMMUNITION; BLASTING
D
BLASTING
1
Blasting methods or apparatus, e.g. for loading or tamping
08
Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
10
Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure
Applicants:
ETI EXPLOSIVES [CA/CA]; 2000 Argentia Road Plaza 5 Suite 200 Mississauga, Ontario L5N 2R7, CA
Inventors:
COURSEN, David, L.; US
FLINCHUM, Rufus, E.; US
Agent:
ROGERS, BERESKIN & PARR; 40 King Street West 40th Floor Toronto, Ontario M5H 3Y2, CA
Priority Data:
524,37516.05.1990US
Title (EN) LOW LEVEL BLASTING COMPOSITION AND METHOD OF BLASTING SAME
(FR) EXPLOSIF A SOUFFLE LENT ET METHODE D'EXPLOSION DE CELUI-CI
Abstract:
(EN) A blasting agent is disclosed for use in a borehole having a pressure resistant closure. The blasting agent is used in combination with a primary initiating system comprised of a detonator and an initiator for the detonator. The blasting agent is preferably a semi-fluid explosive material having a pre-determined sensitivity. The sensitivity is related to the borehole diameter and the initiating system's strength, wherein the blasting agent upon initiation is transformed into explosive products by means of reaction front which consumes substantially all the blasting agent as the reaction front passes through the blasting agent. The reaction front has an average velocity of propagation of between 200 metres/second and 1,000 metres/second for at least 30 % of the total length of blasting agent located in the borehole. Another aspect of the invention is a method of blasting wherein the average velocity of propagation of the explosive front in the blasting agent is in a range of between 200 m/sec and 1,000 m/sec.
(FR) On décrit un explosif destiné à être utilisé dans un trou de forage possédant une fermeture résistant à la pression. On utilise l'explosif en combinaison avec un système d'amorçage primaire comprenant un détonateur et un amorceur pour le détonateur. L'explosif est constitué de préférence d'un matériau explosif semi-fluide possédant une sensibilité prédéterminée. La sensibilité est en rapport avec le diamètre du trou de forage et avec la puissance du système d'amorçage, par lequel l'explosif lors de l'amorçage est transformé en produits explosifs au moyen d'un front de réaction qui consomme essentiellement tout l'explosif lors de son passage à travers l'explosif. Le front de réaction possède une vitesse de propagation moyenne comprise entre 200 mètres/seconde et 1000 mètres/seconde sur au moins 30 % de la longueur de l'explosif placé à l'intérieur du trou de forage. Un autre aspect de l'invention réside dans une méthode d'explosion dans laquelle la vitesse moyenne de propagation du front de déflagration dans l'explosif se situe dans une plage comprise entre 200 m/sec et 1000 m/sec.
Designated States: AU, BR, GB, NO, SE
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1991077803