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CA2187750A1 - Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole - Google Patents

Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole

Info

Publication number
CA2187750A1
CA2187750A1 CA002187750A CA2187750A CA2187750A1 CA 2187750 A1 CA2187750 A1 CA 2187750A1 CA 002187750 A CA002187750 A CA 002187750A CA 2187750 A CA2187750 A CA 2187750A CA 2187750 A1 CA2187750 A1 CA 2187750A1
Authority
CA
Canada
Prior art keywords
drill hole
cartridge
stemming bar
pressurization
controlled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002187750A
Other languages
French (fr)
Other versions
CA2187750C (en
Inventor
John D. Watson
Chapman Young, Iii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RockTek Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2187750A1 publication Critical patent/CA2187750A1/en
Application granted granted Critical
Publication of CA2187750C publication Critical patent/CA2187750C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
    • E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/16—Other methods or devices for dislodging with or without loading by fire-setting or by similar methods based on a heat effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F42D3/04—Particular applications of blasting techniques for rock blasting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)

Abstract

A controlled-fracturing process is accomplished by pressurizing the bottom of a drill hole (6) in such a way as to initiate and propagate a controlled fracture (11) or propagate any pre-existing fractures. A cartridge (5) containing a non-detonating propellant charge (4) is inserted at the bottom of a short hole drilled in the rock. The cartridge (5) is held in place or stemmed by a massive stemming bar (3). A firing pin (2) in the stemming bar (3) strikes a primer which then ignites the propellant (4) in the cartridge (5). The primary method by which the high gas pressures are contained is by the massive inertial stemming bar (3) which blocks the flow of gas up the drill hole (6). A preferred embodiment incorporates an indexing mechanism (37) to allow both a drill (39) and a stemming bar (3) to be used on the same boom (36) for drilling and subsequent charge initiation and firing operations.
CA002187750A 1994-04-14 1994-04-14 Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole Expired - Fee Related CA2187750C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1994/004135 WO1995028551A1 (en) 1994-04-14 1994-04-14 Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole

Publications (2)

Publication Number Publication Date
CA2187750A1 true CA2187750A1 (en) 1995-10-26
CA2187750C CA2187750C (en) 2006-06-27

Family

ID=22242463

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002187750A Expired - Fee Related CA2187750C (en) 1994-04-14 1994-04-14 Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole

Country Status (6)

Country Link
EP (1) EP0753096A4 (en)
JP (1) JPH10500745A (en)
KR (1) KR100319974B1 (en)
AU (1) AU694132C (en)
CA (1) CA2187750C (en)
WO (1) WO1995028551A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014030138A1 (en) * 2012-08-22 2014-02-27 Non-Detonating Solutions (Pty) Limited A cartridge
CN115950308A (en) * 2023-02-15 2023-04-11 广州地铁集团有限公司 Air energy expansion rock fracturing system and method

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2228646A1 (en) 1995-08-04 1997-02-20 John David Watson Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole
ATE253685T1 (en) * 1995-08-07 2003-11-15 Rocktek Ltd METHOD FOR THE CONTROLLED BREAKING OF HARD ROCK AND CONCRETE USING COMBINED USES OF IMPACT HAMMERS AND SMALL EXPLOSIVE CHARGES
AUPP021697A0 (en) 1997-11-06 1997-11-27 Rocktek Limited Radio detonation system
CN1338038A (en) * 1998-12-14 2002-02-27 洛克泰克有限公司 Method and apparatus for charging a hole
US6339992B1 (en) 1999-03-11 2002-01-22 Rocktek Limited Small charge blasting apparatus including device for sealing pressurized fluids in holes
AU739462B2 (en) * 1999-03-11 2001-10-11 Rockmin Pty Ltd Small charge blasting system
US6321655B1 (en) 1999-03-11 2001-11-27 Rocktek Limited Method and apparatus for flyrock control in small charge blasting
US6347837B1 (en) 1999-03-11 2002-02-19 Becktek Limited Slide assembly having retractable gas-generator apparatus
AP2001002313A0 (en) * 1999-03-31 2001-12-31 Rocktech Ltd Cartridge and charging system incorporating same
US6679175B2 (en) 2001-07-19 2004-01-20 Rocktek Limited Cartridge and method for small charge breaking
US20060169162A1 (en) * 2002-01-03 2006-08-03 Edward Andrew W Activated stemming device
CA2472129C (en) * 2002-01-03 2010-02-23 Nxco International Limited Method of and apparatus for breaking rock
FI120418B (en) * 2007-12-27 2009-10-15 Sandvik Mining & Constr Oy Method and equipment for low-input mining
JP5331567B2 (en) * 2009-05-11 2013-10-30 日立造船株式会社 Destruction method
RU2442957C2 (en) * 2010-04-01 2012-02-20 Открытое акционерное общество "Приаргунское производственное горно-химическое объединение " (ОАО "ППГХО") Method for obtaining a preset crushing ratio of fissured mountain mass and the required coefficient of heading advance per round to shot holes length ratio
FR2974141B1 (en) * 2011-04-14 2013-05-03 Irsn NON-DESTRUCTIVE DRILLING METHOD AND DEVICE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960082A (en) * 1974-01-29 1976-06-01 Fedor Ignatievich Sloevsky Down-the-hole device for breaking rock, concrete and reinforced concrete by pulsewize high liquid pressure
US4829900A (en) * 1986-09-15 1989-05-16 Boutade Worldwide Investments Nv Mat for use with rock breaking tool
US5098163A (en) * 1990-08-09 1992-03-24 Sunburst Recovery, Inc. Controlled fracture method and apparatus for breaking hard compact rock and concrete materials
US5308149A (en) * 1992-06-05 1994-05-03 Sunburst Excavation, Inc. Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concrete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014030138A1 (en) * 2012-08-22 2014-02-27 Non-Detonating Solutions (Pty) Limited A cartridge
CN115950308A (en) * 2023-02-15 2023-04-11 广州地铁集团有限公司 Air energy expansion rock fracturing system and method

Also Published As

Publication number Publication date
CA2187750C (en) 2006-06-27
AU694132B2 (en) 1998-07-16
AU694132C (en) 2003-07-10
KR100319974B1 (en) 2002-04-22
JPH10500745A (en) 1998-01-20
AU7393394A (en) 1995-11-10
EP0753096A4 (en) 1999-08-04
EP0753096A1 (en) 1997-01-15
WO1995028551A1 (en) 1995-10-26

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