[특허]Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole

[미국특허] Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F42B-003/00 E21B-007/00
출원번호	US-0692053 (1996-08-02)
발명자 / 주소	Watson John David
출원인 / 주소	Rocktek Limited, AUX
대리인 / 주소	Sheridan Ross PC.
인용정보	피인용 횟수 : 13 인용 특허 : 30

초록 ▼

Rock and other hard materials, such as concrete, are fragmented by a controlled small-charge blasting process. A cartridge containing an explosive charge is inserted at the bottom of a hole drilled in the rock. The explosive charge is configured to provide the desired pressure in the hole bottom, including, if desired, a strong shock spike at the hole bottom to enhance microfracturing. The cartridge is held in place or stemmed by a massive stemming bar of high-strength material such as steel which blocks the flow of gas up the drill hole except for a small leak path between the stemming bar and the drill hole walls. The cartridge-incorporates additional internal volume designed to control the application of pressure in the bottom hole volume by the detonating explosive.

대표청구항 ▼

[ What is claimed is:] [1.] A device for fracturing a hard material, comprising:a cartridge; anda stemming means for holding the cartridge in a hole in the material, the cartridge being located adjacent to an end of the stemming means and including:a cartridge base positioned adjacent to the end of the stemming means; andan outer cartridge housing attached to the cartridge base, a first portion of the outer cartridge housing containing an explosive and a second portion a space for controlling the gas pressure in the hole, wherein at least a portion of a surface of the explosive, that is adjacent to a surface of the cartridge base, is positioned at a distance from and separated by a gap from at least a portion of the surface of the cartridge base to dissipate a detonation shock wave generated during detonation of the explosive and thereby retard damage to the stemming means by the detonation shock wave.

이 특허에 인용된 특허 (30) 인용/피인용 타임라인 분석

Bouldin Brett W. (Friendswood TX), Annular shaped power charge for subsurface well devices.
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Mashimo Tohru (Hiroshima JPX) Nishio Takashi (Hiroshima JPX) Satoh Osamu (Hiroshima JPX), Automatically controlled rock drilling apparatus.
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Van Der Westhuizen Hermanus Q. (Pretoria ZAX) Muller Thomas M. (Boksburg ZAX), Barrel for rock breaking tool and method of use.
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Worsey Paul N. (Rolla MO), Blast plug and stemming construction for blast holes.
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Young ; III Chapman (Steamboat Springs CO), Controlled fracture method and apparatus for breaking hard compact rock and concrete materials.
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Mohaupt Henry H. (1151 Estrella Dr. Santa Barbara CA 93110), Device for stimulating a subterranean formation.
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Dardick David (New York NY), Directional drilling.
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Abrahams Joseph L. (Barrhead GB), Drill units for drilling and charge laying operations and method of carrying out the operations.
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Hopler ; Jr. Robert B. (Succasunna NJ), Excavation apparatus and method.
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Mashimo Tohru (Hiroshima JPX) Satoh Osamu (Hiroshima JPX), Explosive charging apparatus for rock drilling.
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Ewick David W. ; Sutula ; Jr. Daniel P. ; Welch Brendan M. ; Sendek Anthony ; Eicke ; Jr. Willie B., Explosive initiation system.
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Vann Roy R. (Odessa TX), High density jet perforating casing gun.
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Peterson Carl R. (Boxford MA), Longwall canted drum mining machine.
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Cooper ; George A., Method and apparatus for breaking hard compact material such as rock.
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Yates ; Jr. Donald N. (Cape Carancahua TX), Method and apparatus for firing a perforating gun.
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Lavon ; Erik V., Method and device for breaking a hard compact material.
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Lavon Erik V. (Harovagen SEX), Method and device for breaking a hard compact material.
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Lavon Erik V. (Saltsj-Boo SEX), Method and device for breaking a hard compact material.
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Lavon Erik V. (Saltsj-Boo SEX), Method and device for breaking a hard compact material.
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Lavon Erik V. (Saltsjo-Boo SEX), Method and device for breaking hard compact material.
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Willis Roger B. (909 Fairview Ave. Meadville PA 16335) Halleck Phillip M. (102 Nea\Yu\Ka St. Port Matilda PA 16870) Stoner William P. (34 Dogwood Estates Home PA 15747), Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures.
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Denisart Jean-Paul (Lutry CH) Edney Barry E. (Lausanne CH) Lemcke Bo (Lausanne CH), Method of breaking a hard compact material, means for carrying out the method and application of the method.
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Hart Herbert J. (Houston TX), Methods and apparatus for selectively operating multi-charge well bore guns.
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Lockwood Peter (Handsworth GB2) Webster Frederick (Handsworth GB2) Clayton Peter (Handsworth GB2), Mining equipment.
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Peterson Carl R. (Boxford MA), Mining machine having vibration sensor.
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Watson John D. (Evergreen CO) Young ; III Chapman (Steamboat Springs CO), Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concr.
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Kolle Jack J. (Seattle WA), Process and apparatus for fragmenting rock and like material using explosion-free high pressure shock waves.
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Colle ; Jr. Edward A. (Houston TX), Redundant detonation initiators for use in wells and method of use.
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Ey Anthony Leonard,AUX, Shaped charges with plastic liner, concave recess and detonator means.
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Amancharla Amareswar (Dallas TX) Young Carter R. (Lewisville TX), Well plug with anchor means.
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이 특허를 인용한 특허 (13) 인용/피인용 타임라인 분석

Zuritis, Michael, Attachment for a skid steer loader and method of use thereof.
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Gavrilovic, Mihailo, Cartridge and method for small charge breaking.
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Tota, Edward; Rogers, Nigel, Cartridge shell and cartridge for blast holes and method of use.
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Mihailo Gavrilovic ; Keith Wright AU, Controlled electromagnetic induction detonation system for initiation of a detonatable material.
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John David Watson, Method and apparatus for controlled small-charge blasting by decoupled explosive.
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Kemick, Jerome, Method and system for perforating and fragmenting sediments using blasting material.
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Russell, Mark C., Ram accelerator system.
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Russell, Mark C., Ram accelerator system.
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Russell, Mark C., Ram accelerator system with endcap.
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Russell, Mark C.; Elder, Timothy John, Ram accelerator system with rail tube.
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Bassett, Carroll, Self-stemming cartridge.
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Nieuwoudt, Gerhard, Self-stemming cartridge.
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John D. Watson, Small charge blasting apparatus including device for sealing pressurized fluids in holes.
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[미국특허] Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole 원문보기