AU668946B2 - Method of uphole loading - Google Patents
Method of uphole loading Download PDFInfo
- Publication number
- AU668946B2 AU668946B2 AU41210/93A AU4121093A AU668946B2 AU 668946 B2 AU668946 B2 AU 668946B2 AU 41210/93 A AU41210/93 A AU 41210/93A AU 4121093 A AU4121093 A AU 4121093A AU 668946 B2 AU668946 B2 AU 668946B2
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- AU
- Australia
- Prior art keywords
- uphole
- plugging device
- loading
- elongate member
- explosive composition
- 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.)
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- 238000011068 loading method Methods 0.000 title claims description 55
- 238000000034 method Methods 0.000 title claims description 32
- 239000002360 explosive Substances 0.000 claims description 97
- 239000000203 mixture Substances 0.000 claims description 74
- 239000000834 fixative Substances 0.000 claims description 15
- 241000849798 Nita Species 0.000 claims 1
- 239000000839 emulsion Substances 0.000 description 20
- 239000007789 gas Substances 0.000 description 10
- 238000005422 blasting Methods 0.000 description 7
- -1 ANFO Chemical compound 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- DKYWVDODHFEZIM-UHFFFAOYSA-N ketoprofen Chemical compound OC(=O)C(C)C1=CC=CC(C(=O)C=2C=CC=CC=2)=C1 DKYWVDODHFEZIM-UHFFFAOYSA-N 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 239000007762 w/o emulsion Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
1/ci0/011 flogulatiln 3.2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT -Invention Title: "METHOD OF UPHOLE LOADING" [!Ihe following statement is a full description of this invention, Vncluding the best method of performing it known to me:- AUS 1510/CLR -2- METHOD OF BOREHOLE LOADING This invention relates to a method and device for loading boreholes with explosive compositions in S 5 blasting operations.
Explosive compositions commonly used in blasting include mixtures comprising particulate ammonium nitrate such as ANFO, emulsion explosives and mixtures of ANFO plus emulsion explosives.
These explosive compositions have been used in the mining, excavation and similar industries for many years because of their relative low cost and reliability.
Explosive compositions are usually supplied to the customer in two forms, either packaged into cartridges of various sizes or bulk supplied in large quantities from trucks or manufactured on site. Usually only emulsion S•explosive compositions are packaged and they tend to be of S"higher energy, higher cost and tend to be more time consuming to load into boreholes than bulk emulsion explosive compositions. Compared with packaged explosives, bulk emulsion and ANFO type explosives are more cost efficient to manufacture and more time efficient to load into boreholes in blasting applications where large quantities of explosives are required.
Many commonly used explosive compositions comprise particulate ammonium nitrate. One such example is ANFO, which is a mixture of particulate ammonium nitrate and about 6% w/w of a fuel oil such as distillate oil.
Emulsion explosive compositions a::e in common use in th( explosive industry and were first disclosed by Bluhm in United States Patent No.3 447 978 and comprise as components:(a) a discontinuous aqueous phase comprising discrete droplets of an aqueous solution of inorganic oxygen-releasing salts; a continuous water-immiscible organic phase throughout which the droplets are dispersed; an emulsifier which forms an emulsion of the droplets of oxidiser salt ion throughout the continuous organic phase.
Blends of particulate ammonium nitrate, such as ANFO, and water-in-oil emulsion explosives have also been used widely in the industry. Compositions comprising blends of a water-in-oil emulsion and AN (or ANFO) are described, for example, in Australian Patent Application No. 29408/71 (Butterworth) and US Patents 3 161 551 (Egly et al) and 4 357 184 (Binet et al). While the use of bulk explosives is widespread, their application has been limited in those underground mines which include upward sloping drill holes known as "upholes". Difficulties arise in the filling upholes with explosive composition and circumventing the leakage of explosive composition back out of the hole.
15 In the mining industry, rock is fractured by drilling boreholes then filling the boreholes with explosive which is subsequently detonated. Apparatus for on-site manufacture and delivery of ANFO products is known in the art are described, for example, in Australian Patent No.
20 584900.
Most above ground blasting operations utilise "downholes," boreholes which pass into the ground on a downward incline or straight down into the ground. Downward or horizontal boreholes may be utilised when a wall of rock 25 (or masonry) is to be blasted. Underground blasting operations may additionally require the use of "upholes", that is boreholes which are substantially upward sloping or vertically upward when the rock or earth of tunnel ceilings is to be moved.
Explosives boreholes are usually filled or loaded with bulk explosive compositicis by either "blow loading" or "pumping".
Pumping of explosive composition usually involves moving the explosive composition by mechanical or pneumatic means from a holding tank or manufacturing point into the borehole. Typically a motor driven pump, is used to move the explosive composition. The explosive composition must necessarily be sufficiently insensitive to initiation that it can be safely pumped in the aforesaid manner.
4 The term "blow loading" of explosive compositions means the operation by which a hose is passed to the toe of the borehole and the explosive composition is blown into the boreholc from a holding tank or manufacturing point by means of compressed gas as the hose is slowly withdrawn.
Blow loading has been used since the 1960's and is described in Australian Patents Nos. 441,775 (Fox), 466,558 (Persson), 469,494 (Bizon Simpson) and 474,509 (Hay Fox) and is generally used for loading ANFO-type explosive compositions.
The loading of upholes with explosive compositions presents particular problems in blasting operations, due in part to the effect of gravity. The usual approach is to load such holes with packaged explosive compositions by 15 firing the cartridges into the hole using a blast of air from a cartridge loader. Packaged explosives compositions however are far more expensive than bulk explosive compositions hence bulk explosives are preferred when large quantities of explosives are required. Furthermore, 20 cartridge loaders suffer from disadvantages such as heavy recoil and the impact of the cartridge in the borehole can cause packaged emulsion explosive composition to shock crystallise and become inert.
While bulk explosive compositions are often preferred for certain applications, they suffer the disadvantage of a tendency to leak out of upholes. This leakage occurs with varying speed depending on the degree of upward slope of the uphole, the borehole diameter, the viscosity of the emulsion and the amount of water on the walls of the borehole.
Attempts have been made to overcome this problem of leakage where bulk emulsion explosives compositions are used by the use of a loading hose which has a narrowing or constriction at its end. The shear force imposed by the constriction on the passing emulsion explosive composition, increases its viscosity. This approach however, is limited somewhat by the fact that there is an upper limit to the viscosity of an emulsion explosive composition which means this method is only useful for small diameter boreholes, that is, boreholes between about 50 and 90 mm diameter.
Concomitantly, it is often very difficult to pass a flexible loading hose all the way to the toe of a borehole without it bending, kinking or snagging. Rigid hoses are difficult to handle in the limited space of an underground mine,particularly as the uphole may be as much as 40 or metres in length. Once an uphole has been filled with explosive composition, leakage has often been minimised by placing a bung in the borehole to block it quickly after loading.
Yet another approach to solving the problem of filling upholes with explosive compositions has been to use a hose which terminates in a cylindrical "packer" unit. This unit has a middle portion which can be expanded so that it 15 blocks the uphole after it is being filled. The hose and packer unit are withdrawn as the explosive composition is loaded, but when the loading is complete it is still necessary to place a bung in the uphole. The packer unit suffers from the drawback of being cumbersome to handle 20 when attached to a hose and it causes the emulsion loading process to be very slow. Packer units of the prior art are expensive and preferably removed from a borehole prior to detonation. Removal of the packer is often difficult or impossible from large diameter or very long boreholes, 25 particularly in underground mining operations where there is limited room for manoeuvre. The difficulties associated with manipulation of hoses and operational limitations in packer units means that some of the units of the prior art can only be used for boreholes of small diameter.
Some of the packer units of the prior art can be expanded by inflation of a gas bag component however these units are limited in short holes, that is those less than 12 metres, and are limited to modes of operation in which the borehole is loaded with explosive composition from the toe to the collar.
It has now been found that many of the problems associated with the loading of long or wide boreholes and leakage of explosive composition from upholes can be largely overcome by utilising a new process for loading upholes.
There is tberefore provided, according to the present invention, a method of loading a borehole with explosive composition comprising locating within said at least one plugging device comprising a hollow elongate member such as a cylinder, which plugging device is adapted to retain the explosive composition within the borehole, feeding an explosive loading hose through the plugging device and filling the borehole with explosive composition.
There is further provided a plugging device for use in the loading of a borehole with bulk explosive comprising a S hollow elongate member, and at least one concentric flange.
In one preferred embodiment of the plugging device of the S. 15 invention the flange is conical or in the form a of a funnel being tapered from its outer rim to its junction with the hollow elongated member. In a particularly pieferred embodiment, when the plugging device is located in a borehole, the flange tapers towards the toe of the borehole, In another preferred embodiment of the device of the invention the flange is in the form of an annular disc attached to the hollow elongated member.
In a further preferred embodiment of the device of the 25 invention the flange comprises one or more fingerlike projections adapted to contact the wall of the borehole.
In yet a further preferred embodiment the device of the invention comprises two or more flanges which may be in the same or different forms.
The device of the invention may comprise, in addition to one or more concentric flanges, a multiplicity of projections, for example in the form of pins, needles, bristles, tines or cusps, adapted to contact the wall of the borehole.
In a preferred embodiment the ho low elongated member is a piece of piping or similar of circular or square cross section.
It will be apparent to those skilled in the art that the nature of the explosive composition used in the process is not narrowly critical to the present invention. The only requirement is that the explosive composition be able to be delivered into the borehole by pumping, blow loading or equivalent technique. The plugging device of the current invention contributes to flexibility of the borehole loading method because it facilitates charging of a borehole with explosive by filling the borehole from the toe to collar or from collar to toe for a wide range of borehole lengths and diameters.
It will also be apparent to the person skilled in the art that prior to location of the plugging device in the borehole it may be convenient to prime the borehole by .insertion of accessories such as detonators and/or primers or other explosives or accessories.
S 15 Once the plugging device is located in the borehole, a *:.*:fixative such as grouting, cement or similar may be used to secure the plugging device in the borehole such that the plugging device does not move appreciably during loading of the borehole with explosive composition.
20 In a further embodiment, the plugging device of the current invention may comprise an inflatable or expandable bag for securing the device in a borehole. The expandable may be inflated or expanded by any convenient means such as introducing a compressed gas or liquid from an 25 external source into the bag or activating a compressed gas canister inside the bag thus releasing gas. The bag may also be inflated or expanded by chemical means such as mixing two or more chemicals to produce a gas, for example, producing carbon dioxide by the reaction of an acid and a base.
Alternatively the plugging funnel device may be secured in place in the borehole by mechanical means such as anchors, brushes, compressible plugs or flanges attached to the outside of the hollow elongated member of the plugging device. A loading hose is then fed through the hollow elongated member of the plugging device and bulk explosive pumped through the hose.
In a preferred embodiment of the plugging device of the current invention, the flange may be constructed from 8 plistic, rubber or other resilient material which can preferably flex to accommodate slight variations in borehole diameter. In a further embodiment two or more plugging devices can be connected by end to end attachment.
I. another preferred embodiment the hollow elongated member of the plugging device of the current invention may be constructed of any convenient material.
The flange of the plugging device may be adapted to allow the passage of any accessories into the borehole which may be necessary for the blasting operation. In a preferred embodiment the flange is perforated by holes to allow the passage of detonating cord or shocktube or similar from the collar of the borehole to detonators at the toe of the hole.
15 As a borehole is filled with explosive composition or the plugging device is being moved or secured, air or other gas may be displaced from the borehole.
In a further preferred embodiment the flange is modified to allow the passage of a length of hollow tubing 20 to act as a gas bleed tube for passage of gas out of the uphole as the plugging device is being secured in place or the borehole is being filled with explosive composition.
oooe In a preferred embodiment the hollow elongate member of the plugging device is equipped with at least one closure means. The closure may consist of one or more flaps, hinged lids, iris closures or similar at the end of the elongate member. When the loading hose is fully withdrawn from the plugging device the closure means closes and prevents explosive composition from leaking through the elongate member.
In a preferred embodiment the hollow elongate member of the plugging device comprises a lip seal. Said lip seal connects with the circumference of the explosives loading hose or fixative delivery hose and prevents explosive composition or fixative from running back down the hollow elongate member. The lip seal also serves to scrape explosive composition from the outside of said hoses as they are withdrawn from the borehole.
The process and plugging device of the present invention will now be further described with reference to the loading of an uphole with bulk explosive composition.
Figure 1 is a section view of two plugging devices which are connected together located within an explosive uphole and Figures 2 to 5 depict single plugging devices. Figures 6 and 7 depict two different methods of loading a borehole with explosive composition and Figures 8 to 12 depict different embodiments of the plugged device of the current invention.
Figure 1 shows an up-hole located in the ground (1) into which has been placed two plugging devices prior to loading the uphole with explosive composition. The Figure shows a plugging device which has an interference fit with the walls of a borehole. The plugging device has a coarse attachment mechanism at the neck of the hollow elongate member which can snaplock into the base of another hollow elongate member The flanger of the plugging device has a slot or opening through which may pass detonating cord, shock tube or similar (10) for initiating the detonator and the flange further includes an optional air bleed tube The flange also includes a releasable connector (12) for the grout delivery tube e o A flap or similar closure device (14) i.s provided at S 25 the neck of the plugging device.
According to the method of this invention, once the plugging device is put in place, grouting mixture or similar fixative is pumped down the grout delivery tube (13) into the space (15) between the borehole and the plugging device. The fixative is then allowed to set to hardness. A bulk explosive composition loading hose is then passed through the hollow elongate member of the plugging device with a sliding fit and explosive composition is pumped through the hose into the borehole.
35 As the explosive composition is pumped in, air from the borehole is cisplaced through the air bleed tube (11).
The flap (14) serves to clean explosive composition from the outside of the hose and when the hose is fully removed it closes over the end of the plugging device to stop the Cu flow of explosive composition down the hollow elongate member of the funnel device.
Figure 2 depicts one possible embodiment of the plugging device. The plugging device has an attachment means at its neck which can be locker into a receiving means (16) at the base of another device. The flange (8) of the plugging device has slots or holes or similar (9) which allow detonating cord, shock tube or other explosive accessory to pass through the plugging device. The flange also has facility for the releasable connection of an optional fixative delivery tube (13) and preferably provides an air bleed tube (11) or facility for the connection of the air bleed tube to a perforation in the flange. The air bleed tube fixative or explosive composition is passed into the borehole. A flap or similar closure device (14) is located at the neck of the hollow elongated member.
Figure 3 shows a plan view of an uphole in the ground into which has been placed the plugging device of figure 2 prior to loading the uphole with explosive composition. The Figure shows the interference fit (3) between the walls of uphole and the flange of the plugging device. The flange has an opening through em which may be passed detonating cord and an opening through which may be passed an air bleed tube The flange (8) also has an opening (12) through which may pass a fixative delivery tube The openings (11) or (12) may be modified to provide connection devices for attachment of air bleed tubes or fixative delivery tubes.
30 It will be apparent to the person skilled in the art that several embodiments of the current plugging device are possible.
Figure 4 shows a further embodiment of the plugging device. In this embodiment the plugging device comprises a hollow elongated member to which is attached a flange (8a) having several projections a flange which has no projections, a wheel brush (17) and a hinged lid i The flange having no projections is provided with a hole (10) for the passage of shock tube, detonating cord or similar and a hole (11) for the passage of an air bleed tube. The hollow elongated member is optionally provided at its end closest to the toe of the bcrehole (6a) with an internal lip seal (18).
Once this embodiment of the plugging device is placed in an uphole, a hose is passed along the length of the hollow elongated member and fixative passed through the hose, out the toe (6a) end of the hollow elongated member The fixative then runs past the projections (8b) towards the wheel brush (17) and flange The lip seal (18) presses against the circumference of the hose preventing fixative from running back down the hollow elongated member Figure 5 shows another embodiment of the plugging device which can be located in a borehole without the use of a fixative. In this embodiment the plugging device comprises a hollow elongated member to which is attached a flange and a hinged lid The hollow elongated member is further provided with a multiplicity of fine projections (19) such as bristles about its outer surface. These fine projections act to hold the plugging device in position in the borehole io optionally instead of fixative.
Figures 6 and 7 depict utilisation of the device of the current invention in two different methods for loading a borehole with explosive, namely toe-loading and collarloading. Figure 6 shows a mine tunnel (20) and a primed uphole (21) located in the ceiling of the tunnel. A plugging device of the current invention is located 30 close to the collar (21a) of the uphole although it can be located at any convenient position along the borehole. An "'explosive loading hose is passed through the plugging device to the toe of the uphole (21b) before emulsion explosive is pumped through the hose. The hose is 35 withdrawn as the uphole is filled with emulsion explosive.
No air bleed tube is required for the plugging device (2) depicted as air in the uphole can escape between the Sloading hose and hollow elongated member of the plugging device.
~.I
The method of toe loading depicted in Figure 6 would most commonly be used for smaller diameter or drier upholes whilst larger diameter or wetter upholes would preferably be filled by collar loading as depicted in Figure 7. Again the plug can be located at any point along the borehole.
Figure 7 shows a mine tunnel (20) and a primed uphole (21) located in the ceiling of the tunnel. A plugging device of the current invention is located close to the collar (21a) of the uphole. An explosive loading hose (7) is passed through the plugging device until it projects a small distance out of the funnel device. A bleed tube (11) is also located in the uphole to allow escape of air from the uphole as the emulsion level of explosive composition rises from the collar to the toe. A lip seal (18) located within the hollow elongated member of the plugging device seals around the circumference of the loading hose to prevent escaoe of emulsion during pumping of the emulsion explosive composition.
Figure 8 depicts a plugging device of the current invention comprising a hollow elongate member an ippper flange (8c) and a lower flange a hinged lid or flap valve (14) a lip seal (18) located within the hollow elongate member and a bag (22) surrounding the hollow elongate member, which bag may be inflated by gas or other 25 fluid.
Figure 9 depicts the plugging device of figure 8 *co located within the walls of a borehole. In this figure the bag (22) is shown in an inflated state in which it presses firmly against the borehole walls, thus resisting movement of the plugging device as a whole.
Figure 10 depicts a further embodiment of the plugging *'"'"device of the current invention. In this embodiment the elongate hollow member is surrounded between the upper flange (8c) and lower flange (8d) with an expandable 35 bag The bag includes two frangible containers (23a and 23b) which contain chemicals. After the plugging device is located in a suitable position in a borehole the frangible containers are ruptured, the chemicals from the two containers mix and generate gaseous product which inflates the expandable bag. Alternatively, reaction of the chemicals may provide a product having a greater volume than that of the reactants which thereby expands the bag.
Figure 11 shows another embodiment of the plugging device of the current invention. In this embodiment, the plugging device comprises a hollow elongate member an upper flange (8a) and lower flange a hinged lid (14) and a lip seal (18) in addition to a wheel brush plug comprising a pair of wheel brushes (17a and 17b) and a rubber disk or flange The wheel brushes are constructed of polypropylene or any other material which is sufficiently rigid to hole the plugging device in position within a borehole. The rubber disk or flange prevents leakage of explosive composition out of the borehole once it has been charged. A support (25) may be included to prevent excessive flexing of the wheel brush (17a).
Figure 12 depicts a plugging device comprising a hollow elongate member a hinged lid a single flange and lip seal (18) and a locating means (26) which encloses the hollow elongate member. The locating means of this embodiment comprises a compressible neoprene bung which includes a bleed tube channel (27) which permits outflow of air from the borehole when it is charged by filling with explosive composition from toe to collar.
When the plugging device is initially located in a borehole it is held in place by wheel brushes (17a and 17b). As explosive composition is pumped into the borehole, the weight of the composition pushing against a retaining disk (28) on the hollow elongate member causes the retaining disk to slide towards the neoprene bung, compressing the bung longitudinally and thus expanding it laterally and '-*enhancing the seal and grip of the pluggirg device against the borehole walls.
Figure 13 shows a mechanical locating means (26) 35 iprising a hollow elongate member expansion shoulders (29) and flange The neck (6b) of the hollow elongate member is force fitted into a frustro conical member (30) when both members are located within a borehole. The more the neck of the hollow elongate member 14 is forced into the frustro conical member, the more the expansion shoulders (29) are forced apart, wedging the expansion shoulders against the walls of the borehole and thus preventing movement of the plugging device.
In an example of use of the process and device of the present of the invention 24 up-holes of 76 mm and 89 mm and up to 20 m depth were primed with detonators and boosters and two interlocked plugging devices fixed in the up-holes using grouting as shown in Figure i. Two emulsion explosives, POWERGEL* 2500 UB and POWERGEL* 2500 UBX explosive were each loaded into 12 up-holes at a rate of kg/min and pumping pressure of 2000 kPa through a 50 m, 19 mm (internal dian:eter) hose. (POWERGEL is a Registered Trade Mark). After 48 hours, none of the holes showed any signs of leakage of the emulsion explosive and all detonated successfully.
While the invention has been explained in relation to its preferred embodiments it is to be understood that various modifications thereof will become apparent to those skilled in the art upon reading the specification.
Therefore, it is to be understood that the invention disclosed herein is intended to cover such modifications as fall within the scope of the appended claims.
••ore~ J• :e o o
Claims (19)
1. A method of loading an uphole with explosive composition comprising locating within said uphole at least one plugging device comprising a hollow elongate member and at least one concentric flange attached to said elongate member which plugging device is adapted to retain the explosive composition within the uphole, feeding an explosive loading hose through the hollow elongate member and filling the uphole with explosive composition.
2. A method of loading an uphole with explosive composition comprising locating within said uphole tw. or more plugging devices each comprising a hollow elongate member and at least one concentric flange attached to said elongate member, which devices are connected together by their hollow elongate members, feeding an explosive loading hose through the hollow elongate members into the uphole and filling the uphole with explosive composition.
3. A method of loading an uphole according to claim 1 or claim 2 whereby the plugging device is secured in the uphole by a fixative.
4. A method of loading an uphole according to claim 1 or claim 2 whereby the plugging device is secured in said uphole by an inflatable or expandable bag.
A method of loading an uphole according to claim 25 1 or claim 2 whereby said plugging device is secured in S•said uphole by mechanical means.
6. A method of loading an uphole according to any of claims 1 to 5 wherein said plugging device comprises two concentric flanges attached to said hollow elongate member. 30
7. A method of loading an uphole according to any of claims 1 to 6 wherein said plugging device comprises a multiplicity of projections adapted to contact said uphole wall.
8. A method of loading an uphole according to any of claims 1 to 7 wherein said plugging device comprises a gas staffluanikeepAUS. 1590.CR 18.1.9r 15a bleed tube.
9. A method of loading an uphole according to any of 0 stafuanlk9WpALIS.1590.CR 18.1.96 16 claims 1 to 8 wherein said hollow elongate member comprises a closure means at at least one end.
A method of loading an uphole according to any one of claims 1 to 9 wherein said hollow elongate member comprises a lip seal.
11. A method of loading an uphole according to any of claims 1 to 10 wherein said plugging device is adapted to allow the passage of accessories along said uphole.
12. A method of loading an uphole according to any of claims 1 to 11 wherein said uphole is filled with explosive composition from the toe of said uphole to the collar.
13. A method of loading an uphole according to any of claims 1 to 11 wherein said uphole is filled with explosive composition from the collar of said uphole to the toe.
14. An uphole plugging device comprising a hollow elongate member through which an explosives loading \ogs may pass and at least one concentric flange attached to said elongate member, wherein said plugging device is adapted to retain an explosive composition within said 20 uphole.
15. An uphole plugging device according to claim 14 wherein said plugging device comprises a multiplicity of projections adapted to contact said borehole wall.
16. An uphole plugging device according to claims 14 or 15 wherein said plugging device comprises an inflatable or expandable bag.
17. An uphole plugging device according to any one of claims 14 to 16 wherein said plugging device comprises a mechanical means for securing said plugging device in said uphole.
18. A method of loading an uphole substantially as herein described with reference to any one of the embodiments as shown in the accompanying drawings.
19. A method of loading an uphole substantially as herein described with reference to the example. An uphole plugging device substantially as herein staffunidakeepAUS 1590 CR 26.7 17 described with reference to any one of the embodiments as shown in the accompanying drawings. DATED THIS 25TH DAY OF JULY 1995. ICI AUSTRALIA OPERATIONS PROPRIETARY LIMITED staft/nita/keep/AUS.1590.CA 267
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU41210/93A AU668946B2 (en) | 1992-06-15 | 1993-06-11 | Method of uphole loading |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPL2963 | 1992-06-15 | ||
| AUPL296392 | 1992-06-15 | ||
| AU41210/93A AU668946B2 (en) | 1992-06-15 | 1993-06-11 | Method of uphole loading |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU4121093A AU4121093A (en) | 1993-12-23 |
| AU668946B2 true AU668946B2 (en) | 1996-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU41210/93A Ceased AU668946B2 (en) | 1992-06-15 | 1993-06-11 | Method of uphole loading |
Country Status (1)
| Country | Link |
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| AU (1) | AU668946B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046471A2 (en) * | 2001-11-30 | 2003-06-05 | Viljoen, Abraham, Carel | A method of loading a blast hole and a plug therefore |
| WO2004088239A1 (en) * | 2003-04-03 | 2004-10-14 | Stoeckl Robert John | Explosion container |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPN637795A0 (en) * | 1995-11-03 | 1995-11-30 | Ici Australia Operations Proprietary Limited | Method and apparatus for blasthole stemming |
| AU722007C (en) * | 1995-11-03 | 2002-05-02 | Orica Explosives Technology Pty Ltd | Method and apparatus for blasthole stemming |
| AUPO307196A0 (en) * | 1996-10-18 | 1996-11-14 | Ici Australia Operations Proprietary Limited | Method of controlled blasting |
| AU682654B1 (en) * | 1997-03-14 | 1997-10-09 | Silverport Pty. Ltd. | Device to facilitate placing of slurries in up holes |
| WO1998041811A1 (en) * | 1997-03-14 | 1998-09-24 | Silverport Pty. Ltd. | Device to facilitate the placing of slurries in up-holes |
| AU722846B1 (en) * | 1999-03-11 | 2000-08-10 | Rockmin Pty Ltd | A method and apparatuses for pressure wave suppression and fly rock control in small-charge blasting |
| AU739826B2 (en) * | 1999-03-11 | 2001-10-18 | Rockmin Pty Ltd | Apparatus for suppressing fly rock generated by the initiation of an energetic material |
| US6339992B1 (en) | 1999-03-11 | 2002-01-22 | Rocktek Limited | Small charge blasting apparatus including device for sealing pressurized fluids in holes |
| US6332401B1 (en) | 1999-03-11 | 2001-12-25 | Rocktek Limited | Method and apparatus for pressure wave suppression in small-charge blasting |
| AUPR582001A0 (en) * | 2001-06-20 | 2001-07-12 | Banjura Pty Ltd | Protection of blast holes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU492839B2 (en) * | 1974-12-30 | 1977-07-28 | Lennart Hugo Alexander Moller | Method of charging drill holes and means for carrying out the method |
| GB2185052A (en) * | 1986-01-07 | 1987-07-08 | Cll Inc | Method for charging flowable explosives into upwardly extending boreholes |
| AU640102B3 (en) * | 1993-03-02 | 1993-08-12 | Stemtite Inc. | Blast control plug |
-
1993
- 1993-06-11 AU AU41210/93A patent/AU668946B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU492839B2 (en) * | 1974-12-30 | 1977-07-28 | Lennart Hugo Alexander Moller | Method of charging drill holes and means for carrying out the method |
| GB2185052A (en) * | 1986-01-07 | 1987-07-08 | Cll Inc | Method for charging flowable explosives into upwardly extending boreholes |
| AU640102B3 (en) * | 1993-03-02 | 1993-08-12 | Stemtite Inc. | Blast control plug |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003046471A2 (en) * | 2001-11-30 | 2003-06-05 | Viljoen, Abraham, Carel | A method of loading a blast hole and a plug therefore |
| WO2003046471A3 (en) * | 2001-11-30 | 2007-11-08 | Viljoen Abraham Carel | A method of loading a blast hole and a plug therefore |
| WO2004088239A1 (en) * | 2003-04-03 | 2004-10-14 | Stoeckl Robert John | Explosion container |
Also Published As
| Publication number | Publication date |
|---|---|
| AU4121093A (en) | 1993-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |