WO2020000058A1 - A booster assembly - Google Patents
A booster assembly Download PDFInfo
- Publication number
- WO2020000058A1 WO2020000058A1 PCT/AU2019/050690 AU2019050690W WO2020000058A1 WO 2020000058 A1 WO2020000058 A1 WO 2020000058A1 AU 2019050690 W AU2019050690 W AU 2019050690W WO 2020000058 A1 WO2020000058 A1 WO 2020000058A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- booster
- spool
- hole
- assembly
- storage position
- Prior art date
Links
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
- F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
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- 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
-
- 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
- F42B3/10—Initiators therefor
-
- 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
- F42B3/26—Arrangements for mounting initiators; Accessories therefor, e.g. tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/02—Arranging blasting cartridges to form an assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
-
- 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
Definitions
- the invention relates to a booster assembly for use in drill and blast operations.
- the drill and blast process used on many mining sites involves a number of operations that are carried out by mine personnel on a pit floor.
- an initiation system vehicle for delivering a detonation device for initiating an explosion of an explosives material, such as a bulk explosive, in a hole in a pit floor as part of a drill and blast operation.
- the detonation device typically contains a small charge of explosive material.
- the detonation device is hereinafter referred to as a“booster”.
- the term“booster” as used herein is understood to refer to a detonation device typically containing a small charge of explosive material that can be located in a blast hole for the purpose of initiating an explosion of an explosive, such as a bulk explosives material, in the blast hole.
- the explosive material may be a charge of liquid or solid explosive of a fixed quantity that is calculated to detonate a fixed volume of explosive emulsion (or other suitable form of explosive formulation) within a primed drilled hole in a pit floor.
- the inventors have also invented a booster assembly as described herein that comprises a booster and is suitable for use with the initiation system vehicle but is not exclusively limited to use with the vehicle.
- the invention provides a booster assembly for use in a drill and blast operation, comprising in co-axial alignment:
- the spool being provided for allowing the detonation cord to be unwound from the spool as the booster is moved from the storage position to an operative depth in the hole and the spool remains in the storage position;
- the invention provides a booster assembly for use in a drill and blast operation comprising in co-axial alignment:
- a booster for initiating an explosion of an explosive material such as a bulk explosive
- an explosive material such as a bulk explosive
- an end of the spool being formed to receive and locate an end of the booster such that the booster is seated on the spool when the booster assembly is in an upright orientation in the storage position before moving the booster to the operative depth in the hole.
- the booster may contain a charge of an explosive for initiating the explosion of the bulk explosive in the hole in the pit floor.
- the booster and the spool may have complementary formations that allow the spool to receive and locate the booster and thereby seat the booster on the spool.
- the booster may be seated on the spool by being releasably coupled to the spool so that, in use, the booster is coupled to the spool in the storage position and can be moved clear of the spool as part of a process for moving the booster to the operative depth in the hole.
- the booster and the spool may have complementary formations that allow the booster and the spool to be releasably coupled together by positively docking the booster on the spool and allow the booster to be released from the positive docking and moved clear of the spool as part of the process for moving the booster to the operative depth in the hole.
- the booster, spool and stake of the booster assembly may be moved together as a unit from the storage position to a position proximate the hole.
- the booster may comprise a booster casing, for example for containing an explosives charge.
- the booster casing may have an engagement feature, such as a collar, that facilitates engagement of the booster with a delivery assembly, for example that forms part of an initiation system vehicle, for transporting the booster assembly to a delivery position directly above the hole.
- the spool may comprise a spool casing having an engagement feature, such as a collar, that facilitates engagement of the booster assembly with the delivery assembly for transporting the booster assembly to an intermediate transfer position proximate the delivery position directly above the hole.
- an engagement feature such as a collar
- the delivery assembly may be any suitable assembly for transporting the booster assembly.
- the delivery assembly may be part of the initiation system vehicle that is described in a co-pending International application entitled“A mining vehicle” filed in the name of the applicant on the same day as the subject application.
- the purpose of the initiation system vehicle is to transport a plurality of booster assemblies on a pit floor and deliver a booster of each booster assembly in turn to an operative depth in a hole in the pit floor with an operator located in a cabin of the initiation system vehicle or operating the initiation system vehicle remotely or with the vehicle operating autonomously so that the booster can be inserted into the hole without mine personnel having to stand on the pit floor.
- the spool may have a brake to control the release of the detonation cord.
- the stake may be connected to the spool so that the spool and the stake are movable as a unit.
- the spool and the stake may be separately formed as two components that are connected together.
- the spool and the stake may be connected together so that the spool can rotate about a central axis of the stake.
- the spool may include a central cavity extending axially upwardly from a lower end of the spool that receives the stake.
- the stake may include an elongate shank that is received in the cavity of the spool and supported for rotation about a central axis of the shank.
- the booster may have formations that allow the booster to receive and locate a pusher element of the delivery assembly for applying a downwardly-acting force to move the booster downwardly from the delivery position into the hole to the operative depth.
- the booster and the pusher element may be formed so that the pusher element can be releasably coupled to the booster.
- the pusher element may be releasably coupled to the booster by forming the booster with formations that allow the pusher element to be positively docked with the booster.
- the formations may include a recess in an upper end of the booster that can receive the pusher element.
- the initiation system vehicle that is described in the above-mentioned co pending International application in the name of the applicant filed on the same day as the subject application comprises:
- the loading assembly may comprise the pusher element for applying the downwardly acting force to move the booster into the hole to the operative depth.
- the downwardly acting force may be a downward force applied via the pusher element to the booster to move the booster into the hole.
- the downwardly acting force may be a consequence of the weight of the pusher element and the booster whereby the booster can move downwardly via a gravitational force pulling the booster into the hole to the operative depth.
- the pusher element may be formed to (a) couple the booster and the pusher element together to support the booster while the pusher element, in use, moves the booster downwardly into the hole to the operative depth in the hole and (b) release the booster from the pusher element when the booster is at the operative depth so that the pusher element can be withdrawn from the hole.
- the delivery assembly may comprise an arm that is moveable to transport the booster from the storage assembly to the loading assembly.
- the arm may comprise a retaining member for example in the form of grippers that can engage and retain the booster while the arm, in use, transports the booster from the booster storage assembly to the booster delivery position.
- the arm may be pivotally mounted for movement about a vertical axis for transporting the booster from the storage assembly to the loading assembly.
- the storage assembly may be adapted to store a plurality of the booster assemblies.
- the storage assembly may comprise a plurality of upwardly-extending storage tubes for receiving and retaining the booster or booster assembly, with one booster or booster assembly per tube.
- the storage assembly may comprise a lifting assembly for lifting each booster or booster assembly upwardly to an extended position such that the booster extends at least partially from the tube,
- Each storage tube may include an internal guide that can slide in the tube and is adapted to receive and support a lower end of the booster assembly in the tube.
- the internal guide may be adapted to receive and support a lower end of the stake of the booster assembly in the tube.
- the internal guide may include an outer surface that has a diameter that is marginally less than a diameter of an internal wall of the tube and, in use, contacts the inner wall and facilitates sliding movement of the guide in the tube.
- the internal guide may include a pair of spaced apart collars that have the above-described outer surfaces that, in use, contact the inner wall and facilitate sliding movement of the guide in the tube.
- the spacing between the collars may be selected so that the guide can move in a stable way within the tube.
- the internal guide may include a cavity extending from an upper wall of the guide for releasably receiving and supporting the stake. With this arrangement, the stake can be lifted clear of the internal guide when the booster assembly has been lifted to a raised position in the tube.
- the storage assembly may comprise a platform that is arranged to rotate about a central upright axis, with the platform supporting the tubes. Rotation of the platform moves the tubes (and the boosters in the tubes) into a loading position.
- the tubes are open-ended, with the lower ends aligned with openings in the platform.
- Figure 1 is a schematic view of a stemmed hole with emulsion explosive in the hole and, in very schematic form, a booster assembly in accordance with the invention in the hole;
- Figure 2 is a perspective view of one embodiment of a booster assembly in accordance with the invention in an assembled configuration
- Figure 3 is a side view of the booster assembly shown in Figure 2;
- Figure 4 is a vertical cross-section of the booster assembly shown in Figure 3;
- Figure 5 is a perspective view of the booster assembly shown in Figure 2, with the booster of the assembly lifted clear of the spool and the stake of the assembly;
- Figure 6 is a vertical cross-section of the booster assembly shown in Figure 5;
- Figure 7 is a perspective view of a second embodiment of a booster assembly in accordance with the invention in an assembled configuration
- Figure 8 is a side view of a booster of a third embodiment of a booster assembly in accordance with the invention coupled to a pusher element of a loading assembly for supporting and inserting the booster into a hole, with the other components of the booster assembly of this embodiment being shown in Figures IQ- 13;
- Figure 9 is a sectional view of the booster and the pusher element shown in Figure 8 illustrating the engagement mechanism therein for selectively coupling together the booster and the pusher element;
- Figure 10 is an enlarged side view of the spool and the stake of the third embodiment of the booster assembly shown in Figures 8 and 9;
- Figure 11 is an enlarged sectional view of the spool of the third embodiment of the booster assembly shown in Figures 8 and 9;
- Figure 12 is an enlarged side view of the booster of the third embodiment shown in Figures 8 and 9;
- Figure 13 is a sectional view of the booster shown in Figure 12;
- Figure 14 is an enlarged side view of another, but not the only other, embodiment of a booster that can be used as a replacement for the boosters of the embodiments shown in Figures 2 to 13;
- Figure 15 is a sectional view of the booster of Figure 14;
- Figure 16 is an enlarged sectional view of the booster and the pusher element shown in Figure 9 illustrating the booster engagement mechanism therein for selectively coupling together the booster and the pusher element, with the Figure illustrating the pusher element inserted into a cavity in the booster and locating the two components together, and illustrating a compressible engagement member in a non- compressed state;
- Figure 17 is an enlarged sectional view of the booster and the pusher element shown in Figures 9 and 16 illustrating the pusher element and the booster coupled together due to the compressible engagement member being in a compressed state;
- Figure 18 is an enlarged sectional view of the booster and the pusher element shown in Figures 9, 16 and 17 illustrating the pusher element decoupled from the booster due to the compressible engagement member being in a non-compressed state.
- Figure 1 illustrates in very schematic form a booster 65 of an embodiment of a booster assembly 60 in accordance with the invention, such as shown in Figures 2 to 6, and the other Figures after the initiation system vehicle (“ISV”) - not shown in the Figures but described in more detail below - has positioned the booster 65 in a drilled hole 90 in a pit floor 91 at a selected operative depth submerged in an emulsion explosive 93 in the hole 90, with the hole 90 being stemmed and a detonator cord 66 extending from the stemmed hole 90a.
- ISV initiation system vehicle
- the drilled hole 90 is filled via the opening 94 to a depth of 9m with an explosive emulsion 93 rated to operate in high temperature pits, such as produced by Dyna Nobel, the booster 65 is submerged in the hole 90 at the selected operative depth (which is a function of the explosive and the detonation requirements for the hole), and the upper 7m of the hole 90 to the surface of the pit floor 91 is filled via the opening 94 with aggregate 92 or other suitable stemming material, such as an emulsion. It is noted that the drilled hole 90 may be any suitable depth and diameter.
- a spool 63 (from which the detonation cord 66 has been unwound) and an attached stake 61 of the booster assembly 60 remain coupled to the booster 65 via the detonation cord 66.
- the stake 61 is transferred from a storage position on the ISV to the pit floor 91 and driven into the pit floor 91 in proximity to the stemmed hole 90a. Mine personnel can tie the detonation cord 66 into other cords 66 in preparation for blasting.
- booster assembly of the invention is not confined to use with these vehicles.
- one, although not the only, embodiment of the booster assembly 60 of the invention comprises the following co-axially-aligned components:
- a booster 65 (a) a booster 65, (b) a spool 63 and a detonation cord 66 (not shown in Figures 2 to 6 but shown in Figure 1) that, prior to use, is wrapped around the spool 63 in a storage position and connected to the spool 63 and to the booster 65, and
- the spool 63 (as viewed in the Figures) being formed to receive and locate a lower end of the booster 65 (as viewed in the Figures) such that the booster 65 is positively docked with the spool 63 when the booster assembly is in an upright orientation and can be released from the spool 63 and moved independently of the spool 63.
- Each of the booster 65, the spool 63, and the stake 61 may be any suitable dimensions and made from any suitable materials.
- the booster assembly 60 includes two axially- spaced apart collars 79 with outermost surfaces 83 having diameters that are selected to be marginally less than an inner diameter of the tube so that the booster assembly 60 can be snuggly stored in the tube and can slide in the tube.
- the booster 65 contains a large internal cavity 73 for storing a liquid explosive 81 , such as Powermite ThermoTM explosive.
- a base 74 of the booster 65 (see Figures 4-6) is a bullnose shape that in use cooperates with an engagement recess 67 extending into the spool 63 from an upper end (as viewed in the Figures) and forms a booster dock 69 in the spool 63.
- the connection between the recess 67 of the spool 63 and the bullnose end 74 of the booster 65 is a push fit, i.e. frictional engagement: tight enough to support and connect the spool 63 and the booster 65 but easily separated.
- the spool 63 has a central neck 63a around which the detonation cord 66 (not shown in Figures 2 to 6 but shown in Figure 1) is wound for storage.
- a tie-off slot 68 (see Figures 2 and 5) is located on the spool 63 and is used to secure a free end (not shown) of the detonation cord 66.
- the spool 63 also includes a central cavity 91 extending axially into the spool 63 from a lower end of the spool 63 (as viewed in the Figures) that receives and locates an upper section of the stake 61.
- the stake 61 has an elongate shank 75 and a pointed end 77 and is a robust structure for anchoring the spool 63 and attached detonation cord 66 to the pit floor 91 proximate a safe hole 90a in preparation for tie-in, as described above in relation to Figure 2.
- the stake 61 is connected to the spool 63 so that the spool 63 and the stake 61 are movable as a unit.
- the spool 63 and the stake 61 may be separately formed as two components that are connected together.
- the shank 75 of the stake 61 is received in the cavity 91 of the spool 63 and supported via bearings 87 so that the spool 63 can rotate about a central axis of the shank 75 and thereby, in use facilitate the detonation cord 66 unwinding from the spool 63 as the booster 65 is positioned in the hole 90 in the pit floor 91 - see Figure 1.
- the head of the spool 63 and the head of the booster 65 have the same neck profile 71 so that the spool 63 and the boosters 65 can cooperate with the same gripping mechanism (not shown) of a delivery assembly of the above-mentioned ISV.
- the spool 63 and the booster 65 have the same-shaped recess 67 to allow a pusher 41 of a delivery assembly of the above-mentioned ISV to separately engage with the spool 63 and the booster 65.
- the engagement of the pusher 41 and the booster 65 is illustrated in the embodiment of the booster assembly shown in Figures 8, 9, and 16-18.
- a plurality of booster assemblies 60 are stored in a suitable bomb-proof magazine or other suitable storage assembly of the ISV.
- the ISV is driven to a location proximate a hole 90 in the pit floor 91 shown in Figure 1.
- a delivery assembly of the ISV transports a booster assembly 60 from the magazine to an intermediate transfer position (not shown) proximate the delivery position and then transports the booster 65 of that assembly to a loading position directly above the hole 90, with the spool 63 and the stake 61 remaining at the intermediate transfer position.
- a loading assembly of the ISV (i) supports the booster 65 in the delivery position above an opening 94 to the hole 90 and (ii) moves the booster 65 downwardly into the hole 90 via movement of the pusher element 41 and inserts the booster 65 at an operative depth in the hole 90.
- Figure 1 illustrates the booster 65 at the operative depth.
- the detonation cord 66 of the booster assembly 60 unwinds from the spool 63 as the booster 65 is moved into the hole 90.
- the delivery assembly of the ISV moves the spool 63 and the stake 61 from the intermediate transfer position to the stemmed hole 90a and pushes the stake 61 via movement of the pusher element 41 into the pit floor 91 adjacent the stemmed hole 90a as shown in Figure 1.
- the stemmed hole 90a is now ready to be connected to a detonation system to detonate the explosives in this and other holes in a required drill and blast array.
- the ISV can then move to the next hole and repeat the sequence of steps with another booster assembly 60 from the magazine.
- the embodiment of the booster assembly shown in Figure 7 is very similar to the embodiment shown in Figures 2-6 and the same reference numerals are used to describe the same structural features.
- the spool 63 and the stake 61 are identical to the same components in the embodiment shown in Figures 2-6.
- the booster 65 is different. Specifically, the booster 65 is the same booster 65 as the booster of the embodiment shown in Figures 8-13 and 16-18.
- Figure 7 also shows an internal guide 91 of the ISV that, when the booster assembly 60 is stored within a hollow storage tube (not shown) of a storage magazine (not shown), receives and supports a lower end of the stake 61 of the booster assembly 60 in the tube.
- the guide 91 includes outermost surfaces 93 that have a diameter that is marginally less than a diameter of an internal wall of the tube and, in use, contacts the inner wall and facilitates sliding movement of the guide in the tube.
- the guide 91 includes a pair of spaced apart collars 95 that have the outermost surfaces 93. The spacing between the collars 95 is selected so that the guide 91 can move in a stable way within the tube.
- the guide 91 includes a cavity 97 extending downwardly (as viewed in Figure 7) from an upper wall 99 of the guide for releasably receiving and supporting the stake 61.
- the shape of the cavity 97 corresponds to the shape of the lower end of the stake 61 , as shown in the Figure, and the stake 61 is a snug fit in the cavity 97. With this arrangement, the stake 61 can be lifted clear of the guide 91 when the booster assembly 60 has been lifted to a raised position in the tube.
- FIGS. 8-13 and 16-18 show details of another embodiment of a booster assembly 60 in accordance with the invention.
- Figures 14 and 15 show another embodiment of a booster - identified by the numeral 65’ - of the booster assembly shown in Figures 8-13 and 16-18.
- the booster 65 shown in Figures 8, 9, 12 and 13 contains a large internal cavity 73 for storing a liquid explosive such as Powermite ThermoTM explosive.
- the cavity 73’ is reduced in volume for storing a solid explosive such as an HMX explosive.
- a base 74, 74’ of the boosters 65, 65’ provides a rounded protrusion that in use cooperates with the engagement recess 67 that forms a booster dock 69 in the spool 63 - for example, see Figure 4.
- the connection between the recess 67 of the spool 63 and the base 74 of each booster 65, 65’ is a push fit: tight enough to support and connect the spool 63 and each booster 65, 65’ but easily separated.
- each booster 65, 65’ are identical to facilitate engagement with a common spool 63 and a pusher element 41 of a delivery assembly, as described below.
- the spool 63 of the booster assembly 60 shown in Figures 8-13 and 16-18 has a central neck 63a around which the detonation cord 66 (not shown in the Figures of the embodiment) is wound for storage.
- a tie-off slot 68 ( Figure 11) can be located anywhere upon the spool 63 and is used to secure a free end (not shown) of the detonation cord 66.
- a brake mechanism 64 is provided within the spool 63 to limit the rate at which the detonation cord 66 is paid-out.
- the brake 64 comprises a pin that extends through the spool 63 and into contact with the stake 61 therein. Pushing or pulling on the pin increases or decreases the friction between the spool 63 and the stake 61 thereby altering the rate at which the spool 63 rotates about the stake 61.
- the stake 61 of the booster assembly 60 is pointed and robust for anchoring the spool 63 and attached detonation cord 66 to the pit floor 91 adjacent to a safe hole 90a in preparation for tie-in, as described above in relation to Figure 1.
- the head of the spool 63 and the heads of the booster 65, 65’ have the same neck profile 71 so that the spool 63 and each of the boosters 65, 65’ can cooperate with the same gripping mechanism of a delivery assembly.
- the spool 63 and the booster 65, 65’ have the same shaped recess 67 to allow the pusher 41 of the delivery assembly to engage with the spool 63 and each of the boosters 65, 65’.
- the engagement of the pusher 41 and the booster 65 is illustrated in Figures 8 and 9.
- Figures 12 and 13 illustrate the exterior neck profile 71 of the booster 65 for engagement with the gripping mechanism of the delivery assembly.
- the neck profile comprises a base 101 extending around the perimeter of the booster 65 and two sides 103 extending from the base.
- Figures 14 and 15 illustrate the exterior neck profile 71 of the booster 65’ for engagement with the gripping mechanism of the delivery assembly.
- the neck profile is similar to that shown in Figures 12 and 13.
- Figure 13 and 15 illustrate an interior recess 67, 67’ in the head of the booster 65, 65’ forming a pusher dock 79, 79’ for engagement with a pusher 41 of the loading assembly.
- the interior profile of the recess 67, 67’ is shaped to correspond to the exterior profile of a conical nose 46 of the pusher 41 described further below in relation to Figures 16-18.
- the booster engagement mechanism 49 of the pusher 41 of the delivery assembly is illustrated in Figures 9 and 16-18, with the booster 65 engaged with the pusher 41 in Figure 17 and the booster 65 decoupled from the pusher 41 in Figure 18.
- Figure 16 shows the pusher 41 being inserted into the booster 65 as part of a process for coupling the booster 65 and the pusher 41 together.
- the pusher 41 is an elongate element with an upper end and a lower end as evident from Figures 8 and 9 and a cylindrical side wall 121.
- ballast 105 for example lead
- the booster engagement mechanism 49 is located in a lower section of the pusher 41.
- the pusher 41 includes a chamber 117 in a lower section of the pusher 41.
- the chamber 117 is defined by a section 119 of the side wall 121 of the pusher 41 , an upper partition member 123 that separates the chamber 117 and the ballast 105, and lower end element 125.
- the pusher 41 also includes a plate 75 that is arranged for sliding movement along the length of the chamber 117.
- the plate 75 divides the chamber 117 into an upper chamber 117a and a lower chamber 117b.
- the pusher 41 also includes a spring 43 in the upper chamber 117a.
- the spring 43 is selected so that it can extend axially downwardly and compress axially upwardly in response to sliding movement of the plate 75 in the chamber 117.
- the pusher 41 also includes a cylindrical actuator 45 that is connected at one end to the plate 75 and at the other end to the above-mentioned conical nose 46.
- the actuator 45 extends through an opening in the lower end element 125.
- the pusher 41 includes a compressible member 48 that is mounted along a section of the length of the actuator 45 between the nose 46 and an end plate 75.
- the pusher 41 and booster 65 are first axially aligned.
- Compressed air is then fed into the inlet 44 and downwardly through the central tube 115 and into the lower chamber 117b.
- the air increases the pressure in the lower chamber 117b and causes the plate 75 to move upwardly in chamber 117 against the action of the spring 43.
- This upward movement of the plate 75 cause the actuator 45 and the nose 46 to move upwardly, thereby causing the compressible member 48 to be compressed in an axial direction and expanded outwardly in a radial direction.
- the compressible member 48 expands in a radial direction the friction between the recess 67 and the compressible member 48 is increased locking the pusher 41 to the booster 65, illustrated in the coupled mode of Figure 17.
- the compressed air source (not shown) is de-activated, and reduces the pressure in chamber 117b, at which time the return spring 43 expands, pushing plate 75 downwardly and the actuator 45 away from the pusher 41 and allowing the compressed member 48 to expand in an axial direction and contract in the radial direction, reducing the friction between the recess 67 and the compressible member 48 and releasing the booster 65 from the pusher 41 , illustrated in the decoupled mode of Figure 18.
- the booster assembly 60 of the invention makes it possible to efficiently and effectively transfer a booster 65 of the assembly 60 from a storage location to the hole 90 in the pit floor.
- the spool 63 and the stake 61 of the assembly 60 are important components of the booster assembly 60.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/256,446 US20210270590A1 (en) | 2018-06-29 | 2019-06-28 | A booster assembly |
AU2019296519A AU2019296519B2 (en) | 2018-06-29 | 2019-06-28 | A booster assembly |
CA3105119A CA3105119A1 (en) | 2018-06-29 | 2019-06-28 | A booster assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018902370 | 2018-06-29 | ||
AU2018902370A AU2018902370A0 (en) | 2018-06-29 | A booster assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020000058A1 true WO2020000058A1 (en) | 2020-01-02 |
Family
ID=68985363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2019/050690 WO2020000058A1 (en) | 2018-06-29 | 2019-06-28 | A booster assembly |
Country Status (3)
Country | Link |
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US (1) | US20210270590A1 (en) |
CA (1) | CA3105119A1 (en) |
WO (1) | WO2020000058A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2225087A1 (en) * | 1998-03-09 | 1999-09-09 | Ron Teskey | Assembly for perimeter control in rock excavations using detonating cord |
WO2006045144A1 (en) * | 2004-10-27 | 2006-05-04 | Sanleo Holdings Pty Ltd | Platform and a method of locating an object in a borehole |
WO2017147657A1 (en) * | 2016-03-02 | 2017-09-08 | Mti Group Pty Ltd | Detonator lead protector |
WO2017181207A1 (en) * | 2016-04-11 | 2017-10-19 | Detnet South Africa (Pty) Ltd | Apparatus for use in a blasting system |
CN107388910A (en) * | 2017-07-26 | 2017-11-24 | 张勇 | Shallow bore hole means for loading in a kind of underground mining |
-
2019
- 2019-06-28 CA CA3105119A patent/CA3105119A1/en active Pending
- 2019-06-28 WO PCT/AU2019/050690 patent/WO2020000058A1/en active Application Filing
- 2019-06-28 US US17/256,446 patent/US20210270590A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2225087A1 (en) * | 1998-03-09 | 1999-09-09 | Ron Teskey | Assembly for perimeter control in rock excavations using detonating cord |
WO2006045144A1 (en) * | 2004-10-27 | 2006-05-04 | Sanleo Holdings Pty Ltd | Platform and a method of locating an object in a borehole |
WO2017147657A1 (en) * | 2016-03-02 | 2017-09-08 | Mti Group Pty Ltd | Detonator lead protector |
WO2017181207A1 (en) * | 2016-04-11 | 2017-10-19 | Detnet South Africa (Pty) Ltd | Apparatus for use in a blasting system |
CN107388910A (en) * | 2017-07-26 | 2017-11-24 | 张勇 | Shallow bore hole means for loading in a kind of underground mining |
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CA3105119A1 (en) | 2020-01-02 |
AU2019296519A1 (en) | 2021-01-28 |
US20210270590A1 (en) | 2021-09-02 |
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