US3112701A - Disc for upgrading work of explosives - Google Patents

Disc for upgrading work of explosives Download PDF

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Publication number
US3112701A
US3112701A US48986A US4898660A US3112701A US 3112701 A US3112701 A US 3112701A US 48986 A US48986 A US 48986A US 4898660 A US4898660 A US 4898660A US 3112701 A US3112701 A US 3112701A
Authority
US
United States
Prior art keywords
explosive
discs
rim
notch
saucer
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.)
Expired - Lifetime
Application number
US48986A
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English (en)
Inventor
Carl E Grebe
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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
Priority to NL257626D priority Critical patent/NL257626A/xx
Priority to NL127579D priority patent/NL127579C/xx
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to US48986A priority patent/US3112701A/en
Application granted granted Critical
Publication of US3112701A publication Critical patent/US3112701A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • 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
    • F42D1/18—Plugs for boreholes

Definitions

  • Still another object of the present invention is to provide a device for upgrading the work obtainable from ordinarily low sensitivity bulk explosives which permits ready admission of such explosives into bore holes around and in contact with said device.
  • the device of the instant invention useful in effecting the upgrading of explosive work of a given explosive in cylindrical form is a substantially circular member, preferably having a slight curvature so as to be essentially saucer-shaped and defining openings within the wall of said member.
  • FIGURE 1 presents a lateral view of one embodiment of a circular disc, partially cutaway.
  • FIGURE 2 shows a top view of the disc of FIGURE 1.
  • FIGURE 3 shows an explosive device which comprises in combination a cylindrical explosive and saucer shaped discs confined in a bore hole.
  • the circular substantially saucer-shaped disc 11 has a thick outer rim 12. having a notch 13 on its top side 14 and a second notch 15 on the bottom side 16. These notches are so designed that they permit self-stacking of discs 11 one on top of another by fitting notch 15 on the bottom of one disc into notch 13 on the top of another disc.
  • a sloping saucer-shaped wall or extension 17 leads inwardly from the inside wall 18 of the rim 12 and connects this rim 12 with the rim 19 of a central circular reinforcing member 2%) in the shape of a bottom of a. saucer and defining a center opening 2.1.
  • the extension 17 further defines a series of openings 22; spaced at equal intervals around the saucer shaped wall 17. Each opening 22 extends in length over almost the entire section of the wall 17 between the rim .12 and the reinforcing member 20 and is defined in width by the extent of a twenty degree angle extending outward [from the center axis of the opening 21.
  • the circular center opening 21 is designed to accommodate an explosive detonator, such as a shaped charge.
  • an explosive detonator such as a shaped charge.
  • this opening will hold the shaped charge so that its principal axis of detonation is normal to the plane of the diameter of this opening.
  • the discs can be made from a variety of conducting and nonconducting materials but preferably will be fabricated from a light metal such as magnesium, aluminum, magnesium alloy or an aluminum alloy.
  • the devices are fabricated by any of a. variety of means; e.g., sand casting, stamping, deep drawing, permanent mold casting, die casting, forging, etc.
  • a particularly useful and commercially acceptable disc is prepared by die casting utilizing, for example, ASI M designated AZ91B magnesium alloy (nominal composition 9 percent aluminum, 0.15 percent manganese, 0.7 percent zinc, balance magnesium) or the ASIM designated SO84 aluminum alloy (nominal composition 8-9 percent silicon, 3.5 percent copper, balance aluminum).
  • the discs themselves are prepared having an outside diameter from about 3 inches to about 16 inches, but for most commercial blasting the discs will be from about 6 to about '12 inches in outside diameter so as to be accommodated by the corresponding diametered b o-re holes.
  • the thickness of the outer rim 12 and rim 1-9 of the inner circular member 2% are such so as to give dimensional stability to the disc while the extension 17 joining these can be of a minimum wall thickness as is consistent with non-premium casting costs.
  • a comparative set of tests was run in a series of 9 inch diameter commercial bore holes drilled in taco-nite.
  • One set of holes was loaded to a depth of about 30 feet with coarse metal chips (50-50 magnesium and aluminum) and had perforated saucer-like discs placed laterally at about 3 foot intervals up through the bore hole.
  • a shaped charge initiator, armed with P-rimacord, was placed in the center opening of the top disc before this was lowered into the bore hole.
  • a liquid ammoniacal solution of ammonium nitrate (containing on a weight basis 4-9 percent water, 25-3 0 percent ammonia, balance ammonium nitrate) was poured into the bore hole. This solution percolated through the metal, passing through the openings of the discs and filled the bore hole to the lateral movement outward from the bench face of readily shovelable rock was produced.
  • An explosive device providing upgraded explosive 3,112,701 Patented Dec. 3., 1963 work which comprises in combination a cylindrical explosive having positioned therein at intervals laterally along the length of said explosive electron conducting substantially saucer-shaped discs and a confining structure for said explosive and discs, said discs having a thick continuous outer rim, said rim having a notch on the top and a notch on the bottom, said notch on the top of said rim of said saucer-shaped disc fitting said notch on the bottom of another of said saucer-shaped discs whereby said discs can be self-stacked, a thin wall extending inwardly from said continuous outer rim to the rim of a central circular reinforcing member, said thin Wall defining a series of openings spaced at equal intervals around said wall and extending in length over almost the entire section of the thin wall between said continuous outer rim and the rim of said central circular reinforcing member and said circular reinforcing member defining a center opening.
  • An explosive device providing upgraded explosive work from low sensitivity bulk explosives confined in a bore hole which comprises in combination a bore hole, a bulk explosive in cylindrical form of substantially the same diameter as said bore hole and light metal substantially saucer-shaped discs, said discs being positioned laterally within said explosive at intervals along the length of said cylindrical explosive, said discs being substantially of the same diameter as said cylindrical explosive, and said cylindrical explosive with said discs being positioned in said bore hole, said discs having a continuous, thick outer rim, said rim having a notch on the top and a notch on the bottom, said notch on the top of said rim of said saucer-sharper disc fitting said notch on the bottom of another of said saucer-shaped discs whereby said discs can be self-stacked, a thin Wall extending inwardly from said continuous outer rim to the rim of a central circular reinforcing member, said thin wall defining a series of openings spaced at equal intervals around said wall, each of said openings extending in length over almost the entire section
  • each of said light metal discs is a die cast magnesium alloy article and the center opening of the circular reinforcing member accommodates a shaped charge.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US48986A 1960-08-11 1960-08-11 Disc for upgrading work of explosives Expired - Lifetime US3112701A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL257626D NL257626A (enrdf_load_stackoverflow) 1960-08-11
NL127579D NL127579C (enrdf_load_stackoverflow) 1960-08-11
US48986A US3112701A (en) 1960-08-11 1960-08-11 Disc for upgrading work of explosives

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48986A US3112701A (en) 1960-08-11 1960-08-11 Disc for upgrading work of explosives
US49017A US3091177A (en) 1960-08-11 1960-08-11 Method for loading a bore hole

Publications (1)

Publication Number Publication Date
US3112701A true US3112701A (en) 1963-12-03

Family

ID=21957643

Family Applications (2)

Application Number Title Priority Date Filing Date
US48986A Expired - Lifetime US3112701A (en) 1960-08-11 1960-08-11 Disc for upgrading work of explosives
US49017A Expired - Lifetime US3091177A (en) 1960-08-11 1960-08-11 Method for loading a bore hole

Family Applications After (1)

Application Number Title Priority Date Filing Date
US49017A Expired - Lifetime US3091177A (en) 1960-08-11 1960-08-11 Method for loading a bore hole

Country Status (6)

Country Link
US (2) US3112701A (enrdf_load_stackoverflow)
BE (1) BE596790A (enrdf_load_stackoverflow)
DE (1) DE1188993B (enrdf_load_stackoverflow)
FR (1) FR1289726A (enrdf_load_stackoverflow)
GB (1) GB973751A (enrdf_load_stackoverflow)
NL (1) NL264205A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173368A (en) * 1962-07-18 1965-03-16 Trojan Powder Co Tamping plug for boreholes
US3377909A (en) * 1967-09-29 1968-04-16 Dow Chemical Co Explosive composition and method
US3610150A (en) * 1968-01-01 1971-10-05 Ici Ltd Blasting method
US4342261A (en) * 1980-06-23 1982-08-03 The United States Of America As Represented By The Secretary Of The Army Shaped charge warhead with mechanical means for preventing rotation
US4510870A (en) * 1981-07-27 1985-04-16 The United States Of America As Represented By The Secretary Of The Army Charge liner construction and method
US20040000514A1 (en) * 2002-06-19 2004-01-01 Helmuth Gabl Filter/screening disc and process for manufacturing this kind of disc
RU176154U1 (ru) * 2017-06-13 2018-01-10 Алексей Николаевич Шустов Скважинное запирающее устройство
RU2649201C1 (ru) * 2017-02-13 2018-03-30 Алексей Николаевич Шустов Скважинное запирающее устройство

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474729A (en) * 1968-02-21 1969-10-28 Gulf Oil Corp Ammonium nitrate explosive package and three-stage method of initiation
ZW13181A1 (en) * 1980-07-29 1983-01-26 Canadian Ind Borehole charging method
FR2581446B1 (fr) * 1985-05-02 1987-10-02 Nielli Philippe Procede d'explosif a pieces modulaires permettant la creation controlee de secousses et d'ondes de choc repetitives a travers les gaz, les airs, les liquides, les solides pour emplois militaires et civils
US5431104A (en) * 1993-06-14 1995-07-11 Barker; James M. Exploding foil initiator using a thermally stable secondary explosive
AUPQ591000A0 (en) 2000-02-29 2000-03-23 Rockmin Pty Ltd Cartridge shell and cartridge for blast holes and method of use
AU2003200490B2 (en) * 2002-02-20 2008-05-08 Rocktek Ltd. Apparatus and method for fracturing a hard material
WO2005071349A1 (en) * 2004-01-26 2005-08-04 Nxco International Limited Rock breaking cartridge and use thereof
AU2014395134B2 (en) * 2014-05-17 2017-04-20 Halliburton Energy Services, Inc. Establishing communication downhole between wellbores
CN112696999B (zh) * 2020-12-30 2022-11-25 山东科技大学 一种用于深孔爆破的装药装置及装药方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1767182A (en) * 1928-01-12 1930-06-24 Lisse Leopold Blasting cartridge with cover and process of production
US2026454A (en) * 1933-01-10 1935-12-31 Seidel & Naumann Ag Locking disk
US2245751A (en) * 1938-09-26 1941-06-17 Gen Motors Corp Fastening device
US2247169A (en) * 1937-12-11 1941-06-24 Heitzman Safety Blasting Plug Blasting shell for surface blasting
US2448648A (en) * 1944-09-08 1948-09-07 Clinton L Stockstill Solar water heater
US2586801A (en) * 1942-08-27 1952-02-26 Us Sec War Incendiary bomb
US2760434A (en) * 1952-01-10 1956-08-28 Olin Mathieson Explosive
US2837996A (en) * 1954-05-04 1958-06-10 Seismograph Service Corp Explosive charge
US2926604A (en) * 1952-06-30 1960-03-01 Norman A Macleod Explosion propagating device
US3016831A (en) * 1958-10-02 1962-01-16 Du Pont Surface wave generator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168030A (en) * 1937-01-12 1939-08-01 Du Pont Explosive composition
DE851474C (de) * 1950-09-22 1952-10-06 Robert Dipl-Ing Meyer Sprengverfahren, insbesondere fuer bergbauliche Zwecke
DE919457C (de) * 1951-06-05 1954-10-21 Trentesaux Toulemonde Sa Sprengpatrone
DE1009084B (de) 1955-02-05 1957-05-23 Hermann Fiene Nicht nachgluehender Zwischenhohlraum-Besatz bzw. Abstandhalter fuer gestreckte Sprengladungen
BE545353A (enrdf_load_stackoverflow) 1955-03-08

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1767182A (en) * 1928-01-12 1930-06-24 Lisse Leopold Blasting cartridge with cover and process of production
US2026454A (en) * 1933-01-10 1935-12-31 Seidel & Naumann Ag Locking disk
US2247169A (en) * 1937-12-11 1941-06-24 Heitzman Safety Blasting Plug Blasting shell for surface blasting
US2245751A (en) * 1938-09-26 1941-06-17 Gen Motors Corp Fastening device
US2586801A (en) * 1942-08-27 1952-02-26 Us Sec War Incendiary bomb
US2448648A (en) * 1944-09-08 1948-09-07 Clinton L Stockstill Solar water heater
US2760434A (en) * 1952-01-10 1956-08-28 Olin Mathieson Explosive
US2926604A (en) * 1952-06-30 1960-03-01 Norman A Macleod Explosion propagating device
US2837996A (en) * 1954-05-04 1958-06-10 Seismograph Service Corp Explosive charge
US3016831A (en) * 1958-10-02 1962-01-16 Du Pont Surface wave generator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173368A (en) * 1962-07-18 1965-03-16 Trojan Powder Co Tamping plug for boreholes
US3377909A (en) * 1967-09-29 1968-04-16 Dow Chemical Co Explosive composition and method
US3610150A (en) * 1968-01-01 1971-10-05 Ici Ltd Blasting method
US4342261A (en) * 1980-06-23 1982-08-03 The United States Of America As Represented By The Secretary Of The Army Shaped charge warhead with mechanical means for preventing rotation
US4510870A (en) * 1981-07-27 1985-04-16 The United States Of America As Represented By The Secretary Of The Army Charge liner construction and method
US20040000514A1 (en) * 2002-06-19 2004-01-01 Helmuth Gabl Filter/screening disc and process for manufacturing this kind of disc
RU2649201C1 (ru) * 2017-02-13 2018-03-30 Алексей Николаевич Шустов Скважинное запирающее устройство
RU176154U1 (ru) * 2017-06-13 2018-01-10 Алексей Николаевич Шустов Скважинное запирающее устройство

Also Published As

Publication number Publication date
DE1188993B (de) 1965-03-11
NL264205A (enrdf_load_stackoverflow)
FR1289726A (fr) 1962-04-06
US3091177A (en) 1963-05-28
GB973751A (en) 1964-10-28
BE596790A (fr) 1961-05-04

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