US3307445A - Borehole blasting device - Google Patents
Borehole blasting device Download PDFInfo
- Publication number
- US3307445A US3307445A US423784A US42378465A US3307445A US 3307445 A US3307445 A US 3307445A US 423784 A US423784 A US 423784A US 42378465 A US42378465 A US 42378465A US 3307445 A US3307445 A US 3307445A
- Authority
- US
- United States
- Prior art keywords
- cartridge
- ignition
- probe
- borehole
- blasting
- 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
Links
- 238000005422 blasting Methods 0.000 title claims description 53
- 239000003380 propellant Substances 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 14
- 239000000523 sample Substances 0.000 description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000000463 material Substances 0.000 description 17
- 238000010304 firing Methods 0.000 description 16
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- 239000004033 plastic Substances 0.000 description 16
- 229920003023 plastic Polymers 0.000 description 16
- 238000010276 construction Methods 0.000 description 11
- 239000002360 explosive Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- -1 for example Substances 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/02—Blasting cartridges, i.e. case and explosive adapted to be united into assemblies
Definitions
- FIG 3 INVENTORS HANS STADLER HEINZ GAWLICK RUDOLF STAHLMANN HANS UMBACH 0M ATTQR NEY United States Patent OfiFice 3,307,445 BQREHGLE BLASTING DEVICE Hans Stadler, Nurnberg, Heinz Gav/lick and Rudolf Stahlmann, Forth, Bavaria, and Hans Umbach, Staileln uber Nurnberg, Germany, assignors to Dynamit Nobel Alrtien Very Low-injection firing or blasting, and more particularly to improvements in the blast cartridge used with waterinjection blasting operations.
- a blasting method utilized since a few years, above all for the mining of coal is the so-called injection firing or blasting (as described in the Nobel-Heft 1960, page 128d and page 220d).
- This method is based on the fact that at first the charge is introduced into the borehole and thereupon water is pressed into the same with the aid of an injection hose. The firing or blasting takes place while maintaining the water pressure. The injection hose is expanded by the water pressure and abuts sealingly against the bore walls.
- the advantage of this method resides especially in the fact that with coal the proportion of lump coal is increased, the coal is not thrown so far which is important for the protection of the firing or blasting personnel, and the dust and cloud gas or smoke formation produced by the blast is reduced.
- this method may also be used with other types of rocks or stone formations other than coal.
- the water-injection blasting is comprised of the following steps: Boring of a borehole, introduction of the hosed cartridge, insertion of the ignition cartridge, introduction of the water-injection hose, supply of water under pressure and blasting or firing.
- the blasting or firing should be carried out only when the firing foreman has determined at a manometer that the required water pressure is present.
- the aim of the present invention is the creation of a blasting apparatus by means of which the injection blasting can be carried out in a considerably more simple and more safe manner.
- the present invention essentially consists in that the blast charge together with the ignition means thereof is constructed in the manner of a cartridge and is attached directly as head at a water-injection probe.
- a single, unitary apparatus now takes the place of the separate parts consisting of water hose, blast charge, ignition charge, and ignition device. It is only necessary for purposes of blasting to bore the blast bore, to introduce the probe together with its blast-head and to apply the water pressure to the injection probe.
- the difiiculties of the installation of the blast charge and the correct packing thereof in the blast-hole and the installation of the ignition charge are obviated by the present invention.
- the blast charge has in every case a shape and form by means of which, in contrast to the use of several individual cartridges, a safe ignition is assured.
- the size of the attached head containing the blast charge depends on the powder quantity necessitated for the blasting operation, and there- 3,37,445 Patented Mar. 7, 1967 fore can be chosen at will without having to change anything in the apparatus.
- An essential characteristic of the injection blasting method according to the present invention is the fact that it does not release a blast effect, properly speaking, but instead a pushing or sliding effect. Consequently, the blast charge which is more properly designated as propellant charge, is a slowly burning explosive, for example, nitrocellulose powder that is assembled in the cartridge in loose packing. It is only necessary that the propellant charge does not burn little by little but instead completely simultaneously as much as possible. This can be achieved in accordance with the present invention by the application of a guide-duct-ignition.
- a tubular pipe member, for example of cardboard, is extended longitudinally of the propellant charge which is operatively connected to the rear of a booster charge which, in turn, is ignited by an ignition device or fuse. The ignition jet of the booster charge guided through the guide duct or pipe ignites the propellant charge instantaneously over the entire length thereof.
- the bottom piece of the cartridge and/or the support part thereof are so constructed that the fuse or ignition device can be installed only shortly prior to the firing or blasting operation so that cartridge and fuse can be stored separately.
- the cartridge case is made appropriately of conventional plastic material, especially of polyethylene. It has been found that the case is not burned out or consumed.
- the bottom piece of the cartridge, into which the ignition device or fuse is inserted is also made of plastic material. Since the booster charge is assembled or installed into a channel of the bottom piece, it might happen that the bottom piece is deformed by the pressure produced during the ignition. This may be prevented if according to a special construction of the present invention, a metallic cylinder is inserted into the bottom piece which absorbs the pressure and keeps the same away from the parts of plastic material.
- the propellant charge cartridge case With longer cartridges for the propellant charge, it may be appropriate to subdivide the propellant charge cartridge case.
- the parts are clamped together by a frictionforrn-locking connection.
- the case parts In order to facilitate with subdivide-d cases the introduction of the guide duct for the ignition jet of the booster charge, the case parts may be separated from one another by intermediate bottoms with cylindrical projection for the emplacement of the pipe sections of the guide duct ignition.
- a switch-manometer is connected into the ignition current circuit of the electric ignition which permits a transmission of a firing or blasting command signal only when the prescribed or intended water pressure is present.
- Another object of the present invention resides in the provision of a unitary water-injection blasting apparatus that not only facilitates the firing operation but also increases the safety and reliability of operation thereof.
- Another object of the present invention resides, for blasting equipment with water injection, in the provision of a unitary probe containing one propellant charge, ignition device, and water supply means which obviates the need for numerous separate parts, facilitates greatly the installation of the necessary element in the borehole and enhances the firing safety.
- Still another object of the present invention resides in the provision of a blasting equipment of the type described above which obviates the need for separately installing the blast charge in the borehole and eliminates the necessity for high degree of correct packing thereof.
- a further object of the present invention resides in the provision of a water-injection blasting apparatus that permits the selection, at will, of the proper quantity of eX- plosives as needed for the particular blasting operation without having to change in any way the apparatus, properly speaking.
- a still further object of the present invention resides in the provision of a blasting apparatus of the type described above which etfectively minimizes the costs by the absence of replacement of costly parts for the probe.
- Still another object of the present invention resides in the provision of a probe assembly containing the blast charges which is so constructed and arranged as to assure a substantially simultaneous burning of the entire propellant charge.
- a further object of the present invention resides in the provision of a blasting apparatus of the type described above which automatically controls the blasting in de pendence on the presence of a predetermined water pressure thereby eliminating human errors.
- FIGURE 1 is an elevational view, partly in cross section, of a water-injection probe with attached cartridge of a blast equipment in accordance with the present invention.
- FIGURE 2 is a partial cross sectional view through a sub-divided cartridge case in accordance with the present invention.
- FIGURE 3 is a partial cross-sectional view, on an enlarged scale, through a modified embodiment of a bottom piece of the cartridge in accordance with the present invention.
- reference numeral 1 generally designates in FIGURE 1 the water-injection probe which essentially consists of the connecting piece generally designated by reference 2 for the pressurized water, of the expanding hose 3, of the connecting sleeves 4, of the pressurized water discharge-head 5, and of the propellant charge cartridge generally designated by reference numeral 6.
- the supply line for the water under pressure is connected to the nipple 7.
- the hose 3 is expanded so that it abuts sealingly against the walls of the blast bore.
- water under pressure is discharged through the head 5 and fills 4- the borehole about the cartridge 6 as well as possibly present gaps and crevices in the stone or rock formation within the vicinity of the cartridge.
- the propellant pressure of the cartridge 6 is thus transmitted by way of the pressurized water to the rock formation, especially to the coal.
- the cartridge 6 consists of a case 7, which is made appropriately of polyethylene, and of a unitary bottom piece 8 connected therewith, through which extends a channel 9.
- the case 7 is filled with a powder charge 10 serving as propellant charge.
- a tubular member or pip 11 extends through the powder charge 10.
- the tubular pipe member 11 is supported at 12 on a projection of the bottom piece 8.
- the channel 9 is filled with a booster charge 30.
- the bottom piece 8 is further provided with claw-like projections 14 for forming a bayonet-type closure device.
- the cartridge 6 is connected with the probe 1 by threadably connected intermediate piece 15, and more particularly by way of a case or sleeve 16 which is provided with apertures or recesses corresponding to the claws 14 so that it can be placed over the claws 14 and then rotated until it extends with the surfaces 17 over the bottom piece 8.
- the case 16 has a thread 13 to which is coordinated a counter-thread at the intermediate piece 15. By tightening the threaded connection the bottom piece 8 is securely clamped against the surface 19.
- a ring 20 of any suitable material is inserted as a precautionary measure to provide a proper seal.
- An electric ignition means 21 of conventional construction is inserted additionally into the intermediate piece 15.
- the case 7 is assumed to be of two-partite construction in the illustrated embodiment.
- the two parts thereof are connected with one another at 22 by a form-lockingforce-locking connection.
- the cartridge is ignited after the blast foreman has determined the presence of the required water pressure, or after the manometer switch closes the ignition circuit, then at first the booster charge 30 is ignited whose ignition jet ignites with the least time delay the propellant charge It) over the entire length of the tubular member 11.
- FIGURE 2 A special measure is illustrated in FIGURE 2 in con junction with the subdivision of the case at 22.
- the lower case part 7a is initially filled with propellant charge.
- a disc 23 is inserted which is provided on both sides thereof with a tubular extension 24.
- the pipe or tubular member 11 is subdivided into the two parts 11a and 11b.
- the disc 23 initially holds the pipe section 11a.
- the second case part 7b is emplaced and the pipe section 11b is introduced into the extension 24.
- FIG- URE 3 illustrates a modified embodiment in which the bottom piece and case are separate parts.
- the bottom piece generally designated by reference numeral 25 in FIGURE 3 and provided with the claws 14 is made of plastic material and passes over into a collar portion 26 into which is inserted the case 7 with form-locking and force-locking connection, as illustrated in FIGURES l and 2 at 22. Additionally, a conically tapered annular groove 27 is formed into the bottom piece 25 into which is clampingly or wedgingly introduced the end of the case 7.
- Reference numeral 28 designates a recess serving for the accommodation of conventional ignition means. It may be readily recognized from both FIGURES 1 and 3 that the ignition means is not a fixed component part of the cartridge but instead that the bottom piece and the connection with the probe are so constructed that the ignition means can be inserted only shortly prior to the blasting operation.
- a bottom piece 25 made of plastic material might be deformed under certain circumstances by the pressure stemming from the ignited booster charge.
- a metallic pipe 29 is inserted into the bottom piece 25 in accordance with the present invention, which is filled with booster charge 30 corresponding to the channel 9 of FIGURE 1.
- a blasting apparatus comprising: probe means operable to be inserted into a borehole and including means radially expandable against the side walls of the borehole for closing the rearward portion of the borehole to form a forward sealed chamber, said probe means being operable to inject a liquid under pressure into the forward sealed chamber of the borehole, a cartridge containing propellant charge means and ignition means, connection means operatively connecting said cartridge to the forward end of said probe means to constitute a head portion for said probe means.
- a blasting apparatus comprising:
- probe means operable to be inserted into a borehole for closing the rearward portion of the borehole to form a forward sealed chamber, said probe means being operable to inject a liquid under pressure into the forward sealed chamber of the borehole, a cartridge containing propellant charge means and ignition means, connection means operatively connecting said cartridge to the forward end of said probe means to constitute a head portion for said probe means, said propellant charge means being a slowly burning explosive assembled into said cartridge case in loose packing, said probe means including a radially expandable hose means operable to expand into sealing engagement with the sides of the borehole when conducting the liquid under pressure.
- a blasting apparatus according to claim 2, wherein said slowly burning explosive essentially consists of nitrocellulose powder.
- said ignition means includes open flame conducting ignition duct means extending longitudinally through the propellant charge means, booster charge means outside of and aligned with said duct means operable to fire into said duct means for igniting said propellant charge, and independent means for igniting said booster charge means.
- a blasting apparatus according to claim 1, wherein said cartridge case consists essentially of plastic material.
- a blasting apparatus comprising:
- probe means operable to be inserted into a borehole for closing the rearward portion of the borehole to form a forward sealed chamber, said probe means being operable to inject a liquid under pressure into the forward sealed chamber of the borehole, a cartridge containing propellant charge means and ignition means, connection means operatively connecting said cartridge to the forward end of said probe means to constitute a head portion for said probe means, said cartridge case consisting essentially of polyethylene plastic material, said probe means including a radially expanding hose means operable to expand into sealing engagement with the sides of the borehole when conducting the liquid under pressure.
- a blasting apparatus according to claim 1, wherein said cartridge has a bottom piece and said ignition means includes an electric ignition device adapted to be inserted into said bottom piece prior to the firing.
- said ignition means includes open flame conducting ignition duct means extending longitudinally through the pro- 6.
- pellant charge means booster charge means at the side of and aligned with said duct means operable to fire into said duct means for igniting said propellant charge, and independent means for igniting said booster charge means, the cartridge case consisting essentially of plastic material.
- a blasting apparatus according to claim 1, wherein said cartridge has a multi-partite construction including a plurality of case container parts, each filled with said propellant charge means, and form-locking and forcelocking connecting means operatively connecting together said plurality of parts.
- a blasting apparatus comprising: probe means adapted to be inserted into a borehole for injecting liquid under pressure into the borehole,
- cartridge structure including case means, propellant charge means, booster charge means and ignition means, said cartridge structure being attached to said probe means as head portion thereof,
- said ignition means including rnuiti-partite ignition guide duct means so arranged that the ignition jet duct extends substantially through the propellant charge means from the booster charge means,
- said cartridge case means being of multi-partite construction, and form-locking and force-locking connecting means operatively connecting together the several parts of said casing means, and intermediate disc means at the separating place of two adjoining case parts having pipe-like extensions for the emplacement of the tubular sections of said multipartite tubular guide duct means.
- a blasting apparatus according to claim 1, wherein:
- said cartridge includes bottom means essentially consisting of plastic material, an ignition channel containing a booster charge means, and metallic bushing means inserted into said channel.
- a blasting apparatus according to claim 1, wherein:
- connection means includes bayonet-type connecting means and threaded clamping means for clamping said bayonet-type connecting means.
- a blasting apparatus according to claim 1, wherein:
- said ignition means includes an electric ignition circuit
- switching manometer means in said circuit includes means for closing said circuit only in the presence of a predetermined pressure of said liquid.
- a blasting apparatus according to claim 11, wherein:
- said cartridge case essentially consists of plastic material
- connection means including bayonet-type connecting means and threaded clamping means for clamping said bayonet-type connecting means.
- a blasting apparatus according to claim 13, wherein said cartridge has a bottom piece and said ignition means includes an electric ignition device adapted to be inserted into said bottom piece prior to the firing.
- a blasting apparatus according to claim 15, wherein:
- said cartridge essentially consists of plastic material
- said cartridge including bottom means essential-1y consisting of plastic material, an ignition channel containing a booster charge means, and metallic bushing means inserted into said channel for reinforcing the structure.
- a blasting apparatus comprising:
- probe means adapted to be inserted into a borehole for injecting liquid under pressure into the borehole, and means in the form of a cartridge structure including case means, propellant charge means, booster charge means and ignition means, said cartridge structure being attached to said probe means as head portion thereof,
- said propellant charge means slowly burning explosive
- said ignition means including multi-partite ignition guide duct means so arranged that the ignition jet duct extends substantially through the propellant charge means from the booster charge means,
- said ignition means being an electric ignition device adapted to be inserted into the bottom means of the cartridge prior to the firing
- said cartridge case means being of multi-partite construction, and form-locking and force-locking connection means operatively connecting together the several parts of said casing means, and intermediate disc means at the separating place of two adjoining case parts having pipe-like'extensions for the emplacement of the tubular sections of said multi-partite tubular guide duct means, i
- said ignition means including an electric ignition circuit
- switching manometer means in said circuit including means for closing said circuit only in the presence of a predetermined pressure of said liquid.
- a blasting apparatus comprising:
- probe means adapted to be inserted into a borehole for injecting liquid under pressure into the borehole
- cartridge structure including case means, bottom means, propellant charge means, booster charge means and ignition means, said cartridge structure being attached to said probe means as head portion thereof,
- said ignition means including multi-partite ignition guide duct means so arranged that the iginition jet duct extends substantially through the propellant charge means from the booster charge means,
- the cartridge case means essentially consisting of plastic material, 7
- said cartridge case means being of multi-partite construction, and form-locking and force-locking connecting means operatively connecting together the several parts of said casing means, and intermediate disc means at the separating place of two adjoining case parts having pipe-like extensions for the emplacement of the tubular sections of said multi-partite tubular guide duct means,
- said bottom means essentially consisting of plastic material and being provided with an ignition channel, and metallic bushing means inserted into said channel for reinforcing the structure.
- a blasting apparatus comprising: probe means adapted to be inserted into a borehole for injecting liquid under pressure into the borehole, and means in the form of a cartridge structure including case means, bottom means, propellant charge means, booster charge means and ignition means, said cartridge structure being attached to said probe means as head portion thereof,
- said ignition means including multi-partite ignition guide duct means so arranged that the ignition jet duct extends substantially through the propellant charge means from the booster charge means,
- thecartridge case means essentially consisting of plastic material
- said ignition means being an electric ignition device adapted to be inserted into the bottom means of the cartridge prior to the firing
- said cartridge case means being of multi-partite construction, and form-locking and force-locking connecting means operatively connecting together the several parts of said casing means, and intermediate disc means at the separating place of two adjoining case parts having pipe-like extensions for the emplacement of the tubular sections of said multipartite tubular guide duct means,
- said bottom means essentially consisting of plastic material and being provided with an ignition channel, and metallic bushing means inserted into said channel for reinforcing the structure,
- said ignition means including an electric ignition circuit
- switching manometer means in said circuit including means for closing said circuit only in the presence of a predetermined pressure of said liquid.
- connection means includes sealing gasket means forming a fluid tight connection between said cartridge and said probe means, and said probe means injecting the liquid into the bore hole rearwardly of said cartridge.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Geophysics And Detection Of Objects (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED43329A DE1195696B (de) | 1964-01-11 | 1964-01-11 | Einrichtung zum Traenkungsschiessen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3307445A true US3307445A (en) | 1967-03-07 |
Family
ID=7047490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US423784A Expired - Lifetime US3307445A (en) | 1964-01-11 | 1965-01-06 | Borehole blasting device |
Country Status (7)
Country | Link |
---|---|
US (1) | US3307445A (nl) |
BE (1) | BE658111A (nl) |
DE (1) | DE1195696B (nl) |
FR (1) | FR1420118A (nl) |
GB (1) | GB1084942A (nl) |
NL (1) | NL6500191A (nl) |
SE (1) | SE309741B (nl) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098189A (en) * | 1976-09-28 | 1978-07-04 | Harry Holm | Method and apparatus for preparing an explosive charge |
US4984520A (en) * | 1988-08-05 | 1991-01-15 | Schlumberger Technology Corporation | Enclosed perforating gun with expendable carrier |
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 |
US5765923A (en) * | 1992-06-05 | 1998-06-16 | Sunburst Excavation, Inc. | Cartridge for generating high-pressure gases in a drill hole |
US5803550A (en) * | 1995-08-07 | 1998-09-08 | Bolinas Technologies, Inc. | Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
US6035784A (en) * | 1995-08-04 | 2000-03-14 | Rocktek Limited | Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
US6102484A (en) * | 1996-07-30 | 2000-08-15 | Applied Geodynamics, Inc. | Controlled foam injection method and means for fragmentation of hard compact rock and concrete |
US6339992B1 (en) | 1999-03-11 | 2002-01-22 | Rocktek Limited | Small charge blasting apparatus including device for sealing pressurized fluids in holes |
US6375271B1 (en) | 1999-04-30 | 2002-04-23 | Young, Iii Chapman | Controlled foam injection method and means for fragmentation of hard compact rock and concrete |
US6422145B1 (en) | 1997-11-06 | 2002-07-23 | Rocktek Ltd. | Controlled electromagnetic induction detonation system for initiation of a detonatable material |
US20040007911A1 (en) * | 2002-02-20 | 2004-01-15 | Smith David Carnegie | Apparatus and method for fracturing a hard material |
US6679175B2 (en) | 2001-07-19 | 2004-01-20 | Rocktek Limited | Cartridge and method for small charge breaking |
US6708619B2 (en) | 2000-02-29 | 2004-03-23 | Rocktek Limited | Cartridge shell and cartridge for blast holes and method of use |
US20060096487A1 (en) * | 2002-01-03 | 2006-05-11 | Andre Van Dyk | Element for initiating propellant |
US8899154B2 (en) | 2011-01-11 | 2014-12-02 | Green Break Technology Limited | Rock breaking |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1077373A1 (ru) * | 1981-12-03 | 1989-07-15 | Украинское отделение Всесоюзного проектно-изыскательского и научно-исследовательского института "Гидропроект" им.С.Я.Жука | Скважинное устройство дл разрушени монолитных объектов |
RU2491402C1 (ru) * | 2012-04-26 | 2013-08-27 | Игорь Глебович Богданов | Богданова способ кумулятивного бурения и устройство для его реализации |
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US2048677A (en) * | 1933-06-21 | 1936-07-28 | Sullivan Machinery Co | Method and apparatus for blasting |
US2383542A (en) * | 1943-03-19 | 1945-08-28 | Edwin A Godfrey | Paper container for dynamite |
US2676662A (en) * | 1949-05-17 | 1954-04-27 | Gulf Oil Corp | Method of increasing the productivity of wells |
GB737255A (en) * | 1952-12-22 | 1955-09-21 | American Cyanamid Co | Improvements in or relating to explosive packages |
US2759418A (en) * | 1951-08-14 | 1956-08-21 | Allied Chem & Dye Corp | Frozen nitrogen tetroxide-hydrocarbon explosives |
US2923238A (en) * | 1957-05-07 | 1960-02-02 | Airmite Midwest Inc | Spacer primer cartridge for ammonium nitrate |
US3070011A (en) * | 1960-07-11 | 1962-12-25 | Jersey Prod Res Co | Directional drilling with explosive charges |
-
1964
- 1964-01-11 DE DED43329A patent/DE1195696B/de active Pending
- 1964-12-29 SE SE15768/64A patent/SE309741B/xx unknown
-
1965
- 1965-01-06 US US423784A patent/US3307445A/en not_active Expired - Lifetime
- 1965-01-07 FR FR1171A patent/FR1420118A/fr not_active Expired
- 1965-01-08 NL NL6500191A patent/NL6500191A/xx unknown
- 1965-01-11 GB GB1271/65A patent/GB1084942A/en not_active Expired
- 1965-01-11 BE BE658111D patent/BE658111A/xx unknown
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US949778A (en) * | 1909-03-17 | 1910-02-22 | Du Pont Powder Co | Mechanism for delivering a plurality of torpedoes simultaneously in a well. |
GB125464A (en) * | 1916-08-15 | 1919-04-24 | Albert George Midford | An Improved Method of and Means for Effecting Boring, Excavating, Mining and similar Operations for Military Purposes. |
US2048677A (en) * | 1933-06-21 | 1936-07-28 | Sullivan Machinery Co | Method and apparatus for blasting |
US2383542A (en) * | 1943-03-19 | 1945-08-28 | Edwin A Godfrey | Paper container for dynamite |
US2676662A (en) * | 1949-05-17 | 1954-04-27 | Gulf Oil Corp | Method of increasing the productivity of wells |
US2759418A (en) * | 1951-08-14 | 1956-08-21 | Allied Chem & Dye Corp | Frozen nitrogen tetroxide-hydrocarbon explosives |
GB737255A (en) * | 1952-12-22 | 1955-09-21 | American Cyanamid Co | Improvements in or relating to explosive packages |
US2923238A (en) * | 1957-05-07 | 1960-02-02 | Airmite Midwest Inc | Spacer primer cartridge for ammonium nitrate |
US3070011A (en) * | 1960-07-11 | 1962-12-25 | Jersey Prod Res Co | Directional drilling with explosive charges |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098189A (en) * | 1976-09-28 | 1978-07-04 | Harry Holm | Method and apparatus for preparing an explosive charge |
US4984520A (en) * | 1988-08-05 | 1991-01-15 | Schlumberger Technology Corporation | Enclosed perforating gun with expendable carrier |
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 |
US5765923A (en) * | 1992-06-05 | 1998-06-16 | Sunburst Excavation, Inc. | Cartridge for generating high-pressure gases in a drill hole |
US6435096B1 (en) | 1995-08-04 | 2002-08-20 | Rocktek Limited | Method and apparatus for controlled small-charge blasting by decoupled explosive |
US6035784A (en) * | 1995-08-04 | 2000-03-14 | Rocktek Limited | Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
US6148730A (en) * | 1995-08-04 | 2000-11-21 | Rocktek Limited | Method and apparatus for controlled small-charge blasting by pressurization of the bottom of a drill hole |
US6145933A (en) * | 1995-08-07 | 2000-11-14 | Rocktek Limited | Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting |
US5803550A (en) * | 1995-08-07 | 1998-09-08 | Bolinas Technologies, Inc. | Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
US6102484A (en) * | 1996-07-30 | 2000-08-15 | Applied Geodynamics, Inc. | Controlled foam injection method and means for fragmentation of hard compact rock and concrete |
US6422145B1 (en) | 1997-11-06 | 2002-07-23 | Rocktek Ltd. | Controlled electromagnetic induction detonation system for initiation of a detonatable material |
US6339992B1 (en) | 1999-03-11 | 2002-01-22 | Rocktek Limited | Small charge blasting apparatus including device for sealing pressurized fluids in holes |
US6375271B1 (en) | 1999-04-30 | 2002-04-23 | Young, Iii Chapman | Controlled foam injection method and means for fragmentation of hard compact rock and concrete |
US6708619B2 (en) | 2000-02-29 | 2004-03-23 | Rocktek Limited | Cartridge shell and cartridge for blast holes and method of use |
US6679175B2 (en) | 2001-07-19 | 2004-01-20 | Rocktek Limited | Cartridge and method for small charge breaking |
US20060096487A1 (en) * | 2002-01-03 | 2006-05-11 | Andre Van Dyk | Element for initiating propellant |
US20040007911A1 (en) * | 2002-02-20 | 2004-01-15 | Smith David Carnegie | Apparatus and method for fracturing a hard material |
US8899154B2 (en) | 2011-01-11 | 2014-12-02 | Green Break Technology Limited | Rock breaking |
Also Published As
Publication number | Publication date |
---|---|
NL6500191A (nl) | 1965-07-12 |
DE1195696B (de) | 1965-07-01 |
FR1420118A (fr) | 1965-12-03 |
GB1084942A (en) | 1967-09-27 |
BE658111A (nl) | 1965-04-30 |
SE309741B (nl) | 1969-03-31 |
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