CA2415221A1 - Method and apparatus for providing a primer with a detonator in a borehole - Google Patents
Method and apparatus for providing a primer with a detonator in a borehole Download PDFInfo
- Publication number
- CA2415221A1 CA2415221A1 CA002415221A CA2415221A CA2415221A1 CA 2415221 A1 CA2415221 A1 CA 2415221A1 CA 002415221 A CA002415221 A CA 002415221A CA 2415221 A CA2415221 A CA 2415221A CA 2415221 A1 CA2415221 A1 CA 2415221A1
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- CA
- Canada
- Prior art keywords
- charging
- charging hose
- hose
- detonator
- primer
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Chutes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention concerns an apparatus adapted to take up a primer (3) with a detonator (7) and intended to be provided in a borehole by means of a chargi ng hose (21) for the filling of the explosives in the hole. The invention includes a cartridge shaped plug (1) adapted to be inserted in the outlet of the charging hose (21) and to releasably be held in the charging hose (21), and to be released from this when the explosives are led out of the charging hose (21). A method for the charging of holes and the charging device for th e described apparatus is also included.
Description
Method and apparatus for providing a primer with a detonator in a borehole.
The invention concerns an apparatus with a primer and a detonator for insertion into a charging hose for inserting bulk explosives in a whole. A method for the s use of the apparatus in connection with the charging of bulk explosives in a whole and a charging device for charging with the apparatus is also described.
When blasting rock cavities and tunnels in rock, it is common to bore holes into the rock and then to place explosives, preferably bulk explosives, into the bore-~o hole along with the primer and detonator, for succeeding ignition of the explosive.
The explosive, the primer and the detonator are often run into the bore hole by means of specific devices or systems designed for the purpose. The explosive can be in powder, pasta/gel, slurry or emulsion form.
~s The holes may have various directions, from horizontal to vertical/upwards di-rested. Of mainly safety reasons it is often desired to be able to perform the charging at a certain distance from the borehole. The reason may be, that the hole is difficult to access, that the area above/in front of the hole can represent danger and that the working operation in this way can be performed faster and ao safer.
Various systems for remote placement of the bulk explosives in boreholes are known. These systems comprise feeding systems for hoses or sticks with bulk explosives- and branch pipe for insertion of necessary primer with detonator.
is The hose or the sticks usually have a diameter of between 1 cm and 15 cm usu-ally made of a flexible material, for instance rubber or plastic. A primer with detonator may be pushed in front of the hose with bulk explosives, to the place to be charges, usually to the bottom of the borehole. The primer is often packed in a sort of cartridge, or skin, to form a "sausage like" unit the detonator is pushed 3o into.
Examples of prior art are shown in the Swedish publications 7506593-8 and 465 566.
SE-465 566 shows a feeding device for flexible hoses or sticks and a charging unit. The feeding device comprises wheels or bands for conveying the hose or sticks and a branch pipe with feeding unit for inserting a primer with detonator.
SE 7506593-8 shows an apparatus for the insertion of a charge in a borehole.
The apparatus comprises an unit with fuse/wire spooled around the apparatus.
In these publications it is shown that a primer with a detonator is carried ahead of a feeding hose and is in this way pushed into a borehole. However, it happens ~o that in some cases and attempted charging must be disrupted - and the items must be pulled out again. This will be difficult with the apparatuses shown in the prior art. Furthermore, it can be a problem that the detonator "falls" into the borehole when this is inclined downwards or vertical. Such holes are often filled with water or other fluids, such that the primer with detonator becomes sur-~s rounded by water, outside the bulk explosives that are filled, and this may effect the ignition of the bulk explosive.
The above mentioned and other disadvantages relating to the charging of bore-holes are omitted with the present invention. The invention concerns an appara-ao tus adapted to include primer with detonator intended to be provided in a bore-hole by means of a charging hose for the filling of explosives into the hole.
The apparatus comprises a cartridge-shaped plug adapted to be pushed into the opening of the charging hose and to be releasable held in the charging hose, and to be freed or released from the charging hose when the explosives are made to as flow out of the charging hose. The apparatus may have an open and a closed end, and the primer will then normally be filled through the open end, and be placed in the charging hose with the closed end first. The detonator is placed in the apparatus and the primer through the open end. Alternatively, a plug or seal in the open end with an opening for the detonator can be formed. The detonator so should preferably be protected by the apparatus when this is put in place.
The cartridge-shaped plug does not necessary need to seal the outlet of the charging hose, because the volume flow and the viscosity of the bulk explosives are such that the bulk explosives will apply a sufficient force on the plug to push it out, without the plug necessarily sealing the outlet of the charging hose. The car-tridge is releasably secured in the charging hose due to the friction between the tube and the cartridge, and this friction force is what is exceeded when the bulk explosives flow out of the charging hose. The bulk explosives can be pumped into the charging hose, or can flow out due to gravity.
Furthermore, the invention comprises a method for providing a primer with deto-nator in a hole to be blasted by means of an apparatus adapted to incorporate primer with detonator to be provided in a borehole by means of a charging hose ~o for the filling of explosives in the hole where the primer and detonator is inserted in a cartridge shaped plug, where the plug is pushed into the outlet of the charg-ing hose and is releasable secured in this during the insertion of the hose in the hole, and where the plug is released from the charging hose by the bulk explo-sives when this is lead out of the charging hose.
is The invention also describes a method be using a charging device comprising a feeding unit, a branch tube with an inlet section and an outlet section connected with a deviated section, a transport channel, a guiding tube and a charging house, where the feeding unit is adapted to feed the charging hose through the ao guiding tube and into the outlet section of the branch pipe comprising the follow-ing steps:
Inserting the charging hose into the guiding tube by means of the feeding unit such that one end of the charging hose is placed in the guiding tube, inserting the apparatus into the transport channel, conveying the apparatus through the trans-~s port channel and into the branch pipe forward to a stopping device placed in the outlet section of the branch pipe, feeding the charging hose such that the charg-ing hose is guided outside the apparatus, and releasing the stopping device such that the charging hose with the apparatus can be conveyed out of the outlet sec-tion of the branch pipe and into the bottom of the hole.
The invention also comprises a charging device for charging bulk explosives into holes, where the charging device comprises a feeding unit for feeding a charging hose, a guiding tube for guiding the charging hose, and a transport channel for inserting the apparatus into a~branch pipe. The charging device furthermore comprises a stopping device holding the apparatus in an outlet section of the branch pipe until the charging hose is led to the outside of the apparatus.
The~apparatus is filled with a primer and a detonator, known in the art. The ap-s paratus can manually or automatically be inserted in the end of the charging hose, before this is led into a hole, usually a borehole or blasting hole in rock.
Preceding the insertion of the charging hose in the hole, bulk explosives are led out of the charging hose and the bulk explosives thereby pushes the apparatus out of the charging hose, such that this stays in the borehole surrounded by bulk explosives. The bulk explosives continues to flow out of the charging hose while this is withdrawn through the hole, and the hole is filled with a predetermined amount of bulk explosives. The detonator communicates in a ordinary way by means of wire or fuse with device well known in the art for igniting the detonator.
~s This charging device may appear similar to the one described in the Swedish publication SE-465 566, but the device according to the present invention also comprises a stopping unit in the branch pipe (denoted as guiding tube 50 in the Swedish publication). The branch pipe comprises two substantially straight areas connected with a curvature or bend, such that the two areas form an angle in re-ao lation to each other. A guiding tube is connected with the branch pipe in this cur-. vature such that the guiding tube forms a substantially straight extension of the one substantially straight area and an angle with the other substantially straight area. The stopping device is provided in the straight area of the branch pipe forming an extension of the guiding tube, such that the device can be "parked"
as against the stopping device after insertion in the branch pipe. The stopping de-vice can be controlled in various ways, as long as it stops the apparatus until the charging hose is led over the apparatus. A counter for the charging hose can for instance be used to indicate when this is placed over the apparatus, and when the charging hose is in a position that accepts the conveying of the apparatus.
so This position is in an area of the guiding tube before the transition to the branch pipe. The stopping device can be controlled electrically, pneumatically or hydrau-lically. Photocells or other means can be used to sense and control this process.
S
Short description of the drawings.
The invention is more closely described below with reference to the accompany-ing drawings, where:
s - fig. 1 shows the apparatus adapted to incorporate primer with detona-for in accordance with the invention with a guiding and friction body where the walls are indicated with dashed fines to show that the appa-ratus is hollow, and a section of the apparatus, - fig. 2 shows the apparatus of fig. 1, with an end flange and where primer, detonator and cavity to take up the detonator is included with dashed lines, - fig. 3 shows the apparatus of fig. 2 placed in a branch pipe, where the apparatus also comprises sealing rings, three guiding and friction or-gans and where the detonator is partly placed in the apparatus, and the ~s cross section of the apparatus, - fig. 4 shows the apparatus of fig. 3 placed in a charging device, where the apparatus is on its way from a transport channel to a stopping de-v~Ce, - fig. 5 shows the charging device of fig. 4, where the apparatus is held ao against the stopping device.
Below follows an embodiment of the invention with reference to the accompany-ing drawings.
as Fig. 1 shows the apparatus A in a simple embodiment of the invention where this may comprise a cartridge or plug 1 and a friction organ 2. Friction organ 2 may be an integrated part of the apparatus A. Alternatively the friction organ may be releasably connected to the apparatus A, such that this may be changed as needed, for instance with charging hoses with various diameters. The apparatus so A can also include several friction organs 2. The fig. A-A shows a cross section of the cartridge 1. The apparatus A is preferably made of plastics, cardboard or other suitable material, and is shov~rn with an open end and a closed end, in this case pointed. The close end could be rounded, flat or have an other shape, but it is advantage if it is given a shape that facilitates the insertion in a charging hose 21. The open end can be sealed with a plug or anything suitable with an opening for the insertion of a detonator 7. The insertion in the end of the charg-ing hose 21 can be performed manually or automatically, which will be described later in the description. Before it is inserted in the charging hose 21, the appara-s tus A is filled with a primer 3, and a detonator 7 is inserted into the primer 3. The apparatus A may be prefilled/produced with primer 3, or the primer may be filled later, for instance just before it shall be used. The detonator 7 is of safety rea-sons normally not inserted into the primer 3 before it shall be used. The detona-tor 7 and the primer 3 are well known components within this line of technology.
The frictions or securing organ 2 shall ensure that cartridge 1 does not fall out of the charging hose 21 before bulk explosives are led out of the charging hose and presses the apparatus A out. The friction organ 2 is shown formed as one thin fin 2, but other shapes and numbers can also be used. Fig. 3 shows three fins. The friction organs 2 should be elastic, such that they are biased towards ~s the walls in the charging hose 21 when the apparatus A is inserted into this. The friction organs 2 may be made elastic by forming them with for instance a V-shape (not shown) and they may be dimensioned such that the apparatus A can be held in place in charging hoses 20 with a multitude of dimensions. The friction organs 2 may also be formed to comprise a guiding function. This will be of par-ao ticularly importance during automatic or semiautomatic charging with the charg-ing hose 21.
Fig. 2 corresponds to fig. 1 but shows some further details. The cartridge or the plug 1 is here equipped with a solid end flange 4. This will abutt the one end as edge or outlet of the charging hose 21 and prevent the apparatus A from moving to far into the charging hose 21, and simultaneously it will protect the cartridge 1 and the charging hose 21 when they are to be inserted in the borehole. Flange has also a function during automatic charging because this flange 4 will then be what stops the apparatus A against a stopping device 19. Flange 4 will in addi-so tion be useful in connection with holding the apparatus during the filling of primer 3 in the cartridge 1. The figure also shows the primer 3, the detonator 7 and a protected cavity 5 with dashed lines in the apparatus A. The cavity 5 has been included to protect the detonator 7 during the insertion in a borehole. The cavity in its simplest form, may be provided by letting the cartridge 1 be dimensioned "a bit too long" such that the necessary amount of primer does not fill the cartridge 1 entirely.
Fig. 3 shows the apparatus A from the figures 1 and 2 placed in a branch pipe 9.
s The apparatus A is however additionally provided with the seals 8 around the circumference of the cartridge 1. The purposes of the seals 8 is to seal a cavity between the cartridge 1 and the branch pipe 9 or a transport channel 14 such that the apparatus A may be transported by means of pressurized air as with "pneumatic dispatch". This is particularly useful during automatic charging.
The sealing rings 8 have an additional function in that way they also wipe awaylbrings along spillings of bulk explosives from the charging hose 21 within a charging device.
Fig. 4 shows a known charging device where the apparatus A as shown on fig. 3 ~s is on its~way towards a stopping device 19 in accordance with an additional fea-ture of the invention. The charging device comprises a guiding tube 15 and a deviated branch pipe 16, 17, 18. The deviated branch pipe 16, 17, 18 has two substantially straight sections, an inlet section and an outlet section 16, 18 re-spectively connected with a deviated section 17 such that the two sections 16, ao forms an angle to each other. A guiding tube 15 is connected to the deviated section 17 such that it forms an extension of the straight outlet section 18.
An opening 20 is placed between the guiding tube 15 and the deviated section 17 such that the charging hose can be led through the guiding tube 15 and through the deviated and the straight outlet section of the branch pipe 17, 18.
The stopping device 19 comprises a locking pin 12 in which the apparatus A is held against and stopped and that holds the apparatus A until the charging hose is led on the outside of the apparatus A. The stopping device 19 is shown purely mechanically, in that a wheel 13 is displaced by the charging hose 21 such that so the locking pin 12 releases the apparatus A and the "ready and charged"
hose can be led out of the outlet section 18 of the branch pipe. However, the stopping device 19 can be controlled in other ways as long as it stops the apparatus A
un-til the charging hose 21 is led over the apparatus A. A counter (not shown) for the charging hose 21 may for instance be used to denote when this is placed g over the apparatus A and when the charging hose 21 is in a position that accepts conveying of the apparatus A. This position is in the area 10 of the guiding pipe 15 in front of the transition to the branch pipe 17, 18. Locking pin 12 may alter-natively be controlled electrically, pneumatically, hydraulically or a combination s for these. Photocells or other means can also be used to sense and control this process. The guiding tube 15 has preferably a reasonably small gap in relation to the charging hose 21, to prevent to much pressurized air to leak out if the ap-paratus A is to be conveyed to the stopping device 19 by pressurized air. A
seal may of course also be provided if necessary. However, the apparatus A may be to conveyed in other ways, making this uncritical. Stemming or driven rolls are ex-amples of such methods. Reference numeral ~14 shows a delivery channel for the apparatus A to the branch pipe 16, 17, 18. This results in the charging hose being charged from a substantial distance (tenths of meters) and this has impor-tant advantageous in relation to safety.
Fig. 5 corresponds to fig. 4 with the exception being, the figure for showing the apparatus A in a position placed towards the stopping device 19 before the con-veying of the charging hose 21.
zo An example of a method according to the invention for charging boreholes with the charging device shown on fig. 5, will comprise the steps of placing a charging hose 21 in the area 10 of the guiding tube 15, inserting the apparatus A into the end (not shown) of the transport or delivery channel 14, applying pressurized air in the transport channel 14 such that the apparatus A is pushed from the end 2s (not shown) of the transport channel 14 and completely in to the outlet end 18 of the branch pipe where it is stopped against the stopping device 19, conveying the charging hose 21 such that it goes over the apparatus A until it reaches the flange 4, releasing the stopping device 19, leading the charging hose 21 by means of a feeding unit (not shown) or in other way into a hole, where it is to be blasted, for instance a borehole for blasting tunnels or rock cavities~(not shown), applying pressure by means of a pump (not shown), or another way, in bulk ex-plosives in the charging hose 21 such that it presses the apparatus A out of the charging hose 21, into the borehole and fills the borehole with bulk explosives in a predetermined amount, while the charging hose is withdrawn through the bore-hole. The bulk explosives displace any water or other fluids in the borehole.
The charging hose 21 is then withdrawn entirely to the area 10 in the guiding tube 15, and the apparatus A is ready to "charge" the charging hose 21 anew with the a new apparatus for charging a new borehole.
The shown examples are only intended to illustrate embodiments of the invention and the invention is only delimited by the enclosed claims.
The invention concerns an apparatus with a primer and a detonator for insertion into a charging hose for inserting bulk explosives in a whole. A method for the s use of the apparatus in connection with the charging of bulk explosives in a whole and a charging device for charging with the apparatus is also described.
When blasting rock cavities and tunnels in rock, it is common to bore holes into the rock and then to place explosives, preferably bulk explosives, into the bore-~o hole along with the primer and detonator, for succeeding ignition of the explosive.
The explosive, the primer and the detonator are often run into the bore hole by means of specific devices or systems designed for the purpose. The explosive can be in powder, pasta/gel, slurry or emulsion form.
~s The holes may have various directions, from horizontal to vertical/upwards di-rested. Of mainly safety reasons it is often desired to be able to perform the charging at a certain distance from the borehole. The reason may be, that the hole is difficult to access, that the area above/in front of the hole can represent danger and that the working operation in this way can be performed faster and ao safer.
Various systems for remote placement of the bulk explosives in boreholes are known. These systems comprise feeding systems for hoses or sticks with bulk explosives- and branch pipe for insertion of necessary primer with detonator.
is The hose or the sticks usually have a diameter of between 1 cm and 15 cm usu-ally made of a flexible material, for instance rubber or plastic. A primer with detonator may be pushed in front of the hose with bulk explosives, to the place to be charges, usually to the bottom of the borehole. The primer is often packed in a sort of cartridge, or skin, to form a "sausage like" unit the detonator is pushed 3o into.
Examples of prior art are shown in the Swedish publications 7506593-8 and 465 566.
SE-465 566 shows a feeding device for flexible hoses or sticks and a charging unit. The feeding device comprises wheels or bands for conveying the hose or sticks and a branch pipe with feeding unit for inserting a primer with detonator.
SE 7506593-8 shows an apparatus for the insertion of a charge in a borehole.
The apparatus comprises an unit with fuse/wire spooled around the apparatus.
In these publications it is shown that a primer with a detonator is carried ahead of a feeding hose and is in this way pushed into a borehole. However, it happens ~o that in some cases and attempted charging must be disrupted - and the items must be pulled out again. This will be difficult with the apparatuses shown in the prior art. Furthermore, it can be a problem that the detonator "falls" into the borehole when this is inclined downwards or vertical. Such holes are often filled with water or other fluids, such that the primer with detonator becomes sur-~s rounded by water, outside the bulk explosives that are filled, and this may effect the ignition of the bulk explosive.
The above mentioned and other disadvantages relating to the charging of bore-holes are omitted with the present invention. The invention concerns an appara-ao tus adapted to include primer with detonator intended to be provided in a bore-hole by means of a charging hose for the filling of explosives into the hole.
The apparatus comprises a cartridge-shaped plug adapted to be pushed into the opening of the charging hose and to be releasable held in the charging hose, and to be freed or released from the charging hose when the explosives are made to as flow out of the charging hose. The apparatus may have an open and a closed end, and the primer will then normally be filled through the open end, and be placed in the charging hose with the closed end first. The detonator is placed in the apparatus and the primer through the open end. Alternatively, a plug or seal in the open end with an opening for the detonator can be formed. The detonator so should preferably be protected by the apparatus when this is put in place.
The cartridge-shaped plug does not necessary need to seal the outlet of the charging hose, because the volume flow and the viscosity of the bulk explosives are such that the bulk explosives will apply a sufficient force on the plug to push it out, without the plug necessarily sealing the outlet of the charging hose. The car-tridge is releasably secured in the charging hose due to the friction between the tube and the cartridge, and this friction force is what is exceeded when the bulk explosives flow out of the charging hose. The bulk explosives can be pumped into the charging hose, or can flow out due to gravity.
Furthermore, the invention comprises a method for providing a primer with deto-nator in a hole to be blasted by means of an apparatus adapted to incorporate primer with detonator to be provided in a borehole by means of a charging hose ~o for the filling of explosives in the hole where the primer and detonator is inserted in a cartridge shaped plug, where the plug is pushed into the outlet of the charg-ing hose and is releasable secured in this during the insertion of the hose in the hole, and where the plug is released from the charging hose by the bulk explo-sives when this is lead out of the charging hose.
is The invention also describes a method be using a charging device comprising a feeding unit, a branch tube with an inlet section and an outlet section connected with a deviated section, a transport channel, a guiding tube and a charging house, where the feeding unit is adapted to feed the charging hose through the ao guiding tube and into the outlet section of the branch pipe comprising the follow-ing steps:
Inserting the charging hose into the guiding tube by means of the feeding unit such that one end of the charging hose is placed in the guiding tube, inserting the apparatus into the transport channel, conveying the apparatus through the trans-~s port channel and into the branch pipe forward to a stopping device placed in the outlet section of the branch pipe, feeding the charging hose such that the charg-ing hose is guided outside the apparatus, and releasing the stopping device such that the charging hose with the apparatus can be conveyed out of the outlet sec-tion of the branch pipe and into the bottom of the hole.
The invention also comprises a charging device for charging bulk explosives into holes, where the charging device comprises a feeding unit for feeding a charging hose, a guiding tube for guiding the charging hose, and a transport channel for inserting the apparatus into a~branch pipe. The charging device furthermore comprises a stopping device holding the apparatus in an outlet section of the branch pipe until the charging hose is led to the outside of the apparatus.
The~apparatus is filled with a primer and a detonator, known in the art. The ap-s paratus can manually or automatically be inserted in the end of the charging hose, before this is led into a hole, usually a borehole or blasting hole in rock.
Preceding the insertion of the charging hose in the hole, bulk explosives are led out of the charging hose and the bulk explosives thereby pushes the apparatus out of the charging hose, such that this stays in the borehole surrounded by bulk explosives. The bulk explosives continues to flow out of the charging hose while this is withdrawn through the hole, and the hole is filled with a predetermined amount of bulk explosives. The detonator communicates in a ordinary way by means of wire or fuse with device well known in the art for igniting the detonator.
~s This charging device may appear similar to the one described in the Swedish publication SE-465 566, but the device according to the present invention also comprises a stopping unit in the branch pipe (denoted as guiding tube 50 in the Swedish publication). The branch pipe comprises two substantially straight areas connected with a curvature or bend, such that the two areas form an angle in re-ao lation to each other. A guiding tube is connected with the branch pipe in this cur-. vature such that the guiding tube forms a substantially straight extension of the one substantially straight area and an angle with the other substantially straight area. The stopping device is provided in the straight area of the branch pipe forming an extension of the guiding tube, such that the device can be "parked"
as against the stopping device after insertion in the branch pipe. The stopping de-vice can be controlled in various ways, as long as it stops the apparatus until the charging hose is led over the apparatus. A counter for the charging hose can for instance be used to indicate when this is placed over the apparatus, and when the charging hose is in a position that accepts the conveying of the apparatus.
so This position is in an area of the guiding tube before the transition to the branch pipe. The stopping device can be controlled electrically, pneumatically or hydrau-lically. Photocells or other means can be used to sense and control this process.
S
Short description of the drawings.
The invention is more closely described below with reference to the accompany-ing drawings, where:
s - fig. 1 shows the apparatus adapted to incorporate primer with detona-for in accordance with the invention with a guiding and friction body where the walls are indicated with dashed fines to show that the appa-ratus is hollow, and a section of the apparatus, - fig. 2 shows the apparatus of fig. 1, with an end flange and where primer, detonator and cavity to take up the detonator is included with dashed lines, - fig. 3 shows the apparatus of fig. 2 placed in a branch pipe, where the apparatus also comprises sealing rings, three guiding and friction or-gans and where the detonator is partly placed in the apparatus, and the ~s cross section of the apparatus, - fig. 4 shows the apparatus of fig. 3 placed in a charging device, where the apparatus is on its way from a transport channel to a stopping de-v~Ce, - fig. 5 shows the charging device of fig. 4, where the apparatus is held ao against the stopping device.
Below follows an embodiment of the invention with reference to the accompany-ing drawings.
as Fig. 1 shows the apparatus A in a simple embodiment of the invention where this may comprise a cartridge or plug 1 and a friction organ 2. Friction organ 2 may be an integrated part of the apparatus A. Alternatively the friction organ may be releasably connected to the apparatus A, such that this may be changed as needed, for instance with charging hoses with various diameters. The apparatus so A can also include several friction organs 2. The fig. A-A shows a cross section of the cartridge 1. The apparatus A is preferably made of plastics, cardboard or other suitable material, and is shov~rn with an open end and a closed end, in this case pointed. The close end could be rounded, flat or have an other shape, but it is advantage if it is given a shape that facilitates the insertion in a charging hose 21. The open end can be sealed with a plug or anything suitable with an opening for the insertion of a detonator 7. The insertion in the end of the charg-ing hose 21 can be performed manually or automatically, which will be described later in the description. Before it is inserted in the charging hose 21, the appara-s tus A is filled with a primer 3, and a detonator 7 is inserted into the primer 3. The apparatus A may be prefilled/produced with primer 3, or the primer may be filled later, for instance just before it shall be used. The detonator 7 is of safety rea-sons normally not inserted into the primer 3 before it shall be used. The detona-tor 7 and the primer 3 are well known components within this line of technology.
The frictions or securing organ 2 shall ensure that cartridge 1 does not fall out of the charging hose 21 before bulk explosives are led out of the charging hose and presses the apparatus A out. The friction organ 2 is shown formed as one thin fin 2, but other shapes and numbers can also be used. Fig. 3 shows three fins. The friction organs 2 should be elastic, such that they are biased towards ~s the walls in the charging hose 21 when the apparatus A is inserted into this. The friction organs 2 may be made elastic by forming them with for instance a V-shape (not shown) and they may be dimensioned such that the apparatus A can be held in place in charging hoses 20 with a multitude of dimensions. The friction organs 2 may also be formed to comprise a guiding function. This will be of par-ao ticularly importance during automatic or semiautomatic charging with the charg-ing hose 21.
Fig. 2 corresponds to fig. 1 but shows some further details. The cartridge or the plug 1 is here equipped with a solid end flange 4. This will abutt the one end as edge or outlet of the charging hose 21 and prevent the apparatus A from moving to far into the charging hose 21, and simultaneously it will protect the cartridge 1 and the charging hose 21 when they are to be inserted in the borehole. Flange has also a function during automatic charging because this flange 4 will then be what stops the apparatus A against a stopping device 19. Flange 4 will in addi-so tion be useful in connection with holding the apparatus during the filling of primer 3 in the cartridge 1. The figure also shows the primer 3, the detonator 7 and a protected cavity 5 with dashed lines in the apparatus A. The cavity 5 has been included to protect the detonator 7 during the insertion in a borehole. The cavity in its simplest form, may be provided by letting the cartridge 1 be dimensioned "a bit too long" such that the necessary amount of primer does not fill the cartridge 1 entirely.
Fig. 3 shows the apparatus A from the figures 1 and 2 placed in a branch pipe 9.
s The apparatus A is however additionally provided with the seals 8 around the circumference of the cartridge 1. The purposes of the seals 8 is to seal a cavity between the cartridge 1 and the branch pipe 9 or a transport channel 14 such that the apparatus A may be transported by means of pressurized air as with "pneumatic dispatch". This is particularly useful during automatic charging.
The sealing rings 8 have an additional function in that way they also wipe awaylbrings along spillings of bulk explosives from the charging hose 21 within a charging device.
Fig. 4 shows a known charging device where the apparatus A as shown on fig. 3 ~s is on its~way towards a stopping device 19 in accordance with an additional fea-ture of the invention. The charging device comprises a guiding tube 15 and a deviated branch pipe 16, 17, 18. The deviated branch pipe 16, 17, 18 has two substantially straight sections, an inlet section and an outlet section 16, 18 re-spectively connected with a deviated section 17 such that the two sections 16, ao forms an angle to each other. A guiding tube 15 is connected to the deviated section 17 such that it forms an extension of the straight outlet section 18.
An opening 20 is placed between the guiding tube 15 and the deviated section 17 such that the charging hose can be led through the guiding tube 15 and through the deviated and the straight outlet section of the branch pipe 17, 18.
The stopping device 19 comprises a locking pin 12 in which the apparatus A is held against and stopped and that holds the apparatus A until the charging hose is led on the outside of the apparatus A. The stopping device 19 is shown purely mechanically, in that a wheel 13 is displaced by the charging hose 21 such that so the locking pin 12 releases the apparatus A and the "ready and charged"
hose can be led out of the outlet section 18 of the branch pipe. However, the stopping device 19 can be controlled in other ways as long as it stops the apparatus A
un-til the charging hose 21 is led over the apparatus A. A counter (not shown) for the charging hose 21 may for instance be used to denote when this is placed g over the apparatus A and when the charging hose 21 is in a position that accepts conveying of the apparatus A. This position is in the area 10 of the guiding pipe 15 in front of the transition to the branch pipe 17, 18. Locking pin 12 may alter-natively be controlled electrically, pneumatically, hydraulically or a combination s for these. Photocells or other means can also be used to sense and control this process. The guiding tube 15 has preferably a reasonably small gap in relation to the charging hose 21, to prevent to much pressurized air to leak out if the ap-paratus A is to be conveyed to the stopping device 19 by pressurized air. A
seal may of course also be provided if necessary. However, the apparatus A may be to conveyed in other ways, making this uncritical. Stemming or driven rolls are ex-amples of such methods. Reference numeral ~14 shows a delivery channel for the apparatus A to the branch pipe 16, 17, 18. This results in the charging hose being charged from a substantial distance (tenths of meters) and this has impor-tant advantageous in relation to safety.
Fig. 5 corresponds to fig. 4 with the exception being, the figure for showing the apparatus A in a position placed towards the stopping device 19 before the con-veying of the charging hose 21.
zo An example of a method according to the invention for charging boreholes with the charging device shown on fig. 5, will comprise the steps of placing a charging hose 21 in the area 10 of the guiding tube 15, inserting the apparatus A into the end (not shown) of the transport or delivery channel 14, applying pressurized air in the transport channel 14 such that the apparatus A is pushed from the end 2s (not shown) of the transport channel 14 and completely in to the outlet end 18 of the branch pipe where it is stopped against the stopping device 19, conveying the charging hose 21 such that it goes over the apparatus A until it reaches the flange 4, releasing the stopping device 19, leading the charging hose 21 by means of a feeding unit (not shown) or in other way into a hole, where it is to be blasted, for instance a borehole for blasting tunnels or rock cavities~(not shown), applying pressure by means of a pump (not shown), or another way, in bulk ex-plosives in the charging hose 21 such that it presses the apparatus A out of the charging hose 21, into the borehole and fills the borehole with bulk explosives in a predetermined amount, while the charging hose is withdrawn through the bore-hole. The bulk explosives displace any water or other fluids in the borehole.
The charging hose 21 is then withdrawn entirely to the area 10 in the guiding tube 15, and the apparatus A is ready to "charge" the charging hose 21 anew with the a new apparatus for charging a new borehole.
The shown examples are only intended to illustrate embodiments of the invention and the invention is only delimited by the enclosed claims.
Claims (11)
1 Claims:
An apparatus (A) adapted to take up a primer (3) with a detonator (7) and adapted to be provided in a borehole by means of a charging hose (21) for the filling of explosives in the hole, characterized in that it comprises a cartridge shaped plug (1) adapted to be pushed into the outlet of the charging hose (21) and to releasable be held in the charging hose (21) and to be released from this w hen the explosives are led out of the charging hose (21) and that the cartridge shaped body (1) comprises an outside flange (4).
An apparatus (A) adapted to take up a primer (3) with a detonator (7) and adapted to be provided in a borehole by means of a charging hose (21) for the filling of explosives in the hole, characterized in that it comprises a cartridge shaped plug (1) adapted to be pushed into the outlet of the charging hose (21) and to releasable be held in the charging hose (21) and to be released from this w hen the explosives are led out of the charging hose (21) and that the cartridge shaped body (1) comprises an outside flange (4).
2. The apparatus according to claim 1, characterized in that the apparatus (A) comprises one or several guiding and friction organs (2) situated on the outside diameter of the cartridge shaped body (1) of the apparatus (A).
3. The apparatus according to claim 1, characterized in that the outside flange (4) is adapted to be held by the apparatus (A) in a charging device.
4. The apparatus according to claim 1, characterized in that it comprises seals (8) for sealing between the appa-ratus (A) and a transport channel (14), such that it can be conveyed pneumati-cally to a position ahead of the charging hose (21).
5. The apparatus according to claim 1, characterized in that it is formed with a length greater than what is nec-essary for placing a predetermined amount of primer, such that it protects the detonator (7) to be inserted in the apparatus (A).
6. A charging device for charging the apparatus (A) according to claim 1 and bulk explosives in holes, where the charging device comprises a feeding unit for feeding a charging hose (21), a guiding tube (15) for guiding the charging hose (21), and a transport channel (14) for inserting the apparatus (A), a branch pipe comprising of substantially straight sections, and an inlet section and an outlet section (16, 18) respectively, in connection with a deviated section (17) letting the two sections (16, 18) form an angle in relation to each other, characterized in that the charging device furthermore comprises a stop-ping device (19) adapted to hold the apparatus (A) in the outlet section (18) of the branch pipe until the charging hose (21) is led on the outside of the appara-tus (A), the stopping device (19) being adapted to impinge the flange (4) of the apparatus (A).
7. The charging device according to claim 4, characterized in that the stopping device (19) comprises means releasing the apparatus (A) when this is sufficiently placed in the outlet of the charging hose (21).
8. A method for providing a primer (3) with detonator (7) in a hole to be blasted by means of an apparatus adapted to take up primer (3) with detonator (7) and intended to be provided in a borehole by means of a charging hose (21) for the filling of bulk explosives in the hole, characterized in that the primer (3) and detonator (7) is inserted in a car-tridge shaped plug (1), that the plug (1) is inserted into the outlet of the charging hose (21) and is releasably secured in this during the insertion of the charging hose (21) in the hole, and that the plug (1) is released from the charging hose (21) by the bulk explosives when this is led out of the charging hose.
9. The method according to claim 8 with a charging unit comprising a feeding unit, a branch pipe with an inlet section and an outlet section (16, 18) connected with a deviated section (17), a transport channel (14), a guiding tube (15), and a charging hose (21), where the feeding unit is adapted to convey the charging hose (21) through the guiding tube (15) and into the outlet section (18) of the branch pipe, characterized in the following steps:
insertion of the charging hose (21) in the guiding tube (15) with the feeding unit such that one end of the charging hose (21) is placed in the guiding tube (15), insertion of the apparatus (A) into the transport channel (14), conveying the apparatus (A) through the transport channel (14) into the branch pipe (16, 17, 18) until it reaches a stopping device (19) placed in the outlet sec-tion (18) of the branch pipe, feeding of the charging hose (21) such that the charging hose (21) is led on the outside of the apparatus (A), and releasing the stopping device (19) such that the charging hose (21) with the apparatus (A) can be led out of the outlet section (18) of the branch pipe.
insertion of the charging hose (21) in the guiding tube (15) with the feeding unit such that one end of the charging hose (21) is placed in the guiding tube (15), insertion of the apparatus (A) into the transport channel (14), conveying the apparatus (A) through the transport channel (14) into the branch pipe (16, 17, 18) until it reaches a stopping device (19) placed in the outlet sec-tion (18) of the branch pipe, feeding of the charging hose (21) such that the charging hose (21) is led on the outside of the apparatus (A), and releasing the stopping device (19) such that the charging hose (21) with the apparatus (A) can be led out of the outlet section (18) of the branch pipe.
10. The method according to claim 8, characterized in that it further comprises:
feeding the charging hose (21) into a borehole to a place where a bulk explosive shall be placed;
pumping the bulk explosives such that it presses the apparatus (A) out of the charging hose (21).
feeding the charging hose (21) into a borehole to a place where a bulk explosive shall be placed;
pumping the bulk explosives such that it presses the apparatus (A) out of the charging hose (21).
11. The use of the apparatus (A) in according with claim 1 in a charging hose (21) for bulk explosives.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20003438A NO314914B1 (en) | 2000-07-03 | 2000-07-03 | Apparatus and method for placing primer with teeth in a borehole |
| NO20003438 | 2000-07-03 | ||
| PCT/NO2001/000276 WO2002003021A1 (en) | 2000-07-03 | 2001-06-29 | Method and apparatus for providing a primer with a detonator in a borehole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2415221A1 true CA2415221A1 (en) | 2002-01-10 |
Family
ID=19911339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002415221A Abandoned CA2415221A1 (en) | 2000-07-03 | 2001-06-29 | Method and apparatus for providing a primer with a detonator in a borehole |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20050161257A1 (en) |
| JP (1) | JP4430300B2 (en) |
| KR (1) | KR100768278B1 (en) |
| AU (2) | AU2001266433B2 (en) |
| CA (1) | CA2415221A1 (en) |
| NO (1) | NO314914B1 (en) |
| SE (1) | SE523877C2 (en) |
| WO (1) | WO2002003021A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10570736B2 (en) * | 2016-06-09 | 2020-02-25 | Abb Schweiz Ag | Robot automated mining |
| CN111464626B (en) * | 2017-02-28 | 2022-09-13 | 福建新和兴信息技术有限公司 | File storage method |
| AU2020278880A1 (en) * | 2019-05-21 | 2021-12-23 | Olitek Pty Ltd | Triggering explosives in holes |
| SE545574C2 (en) * | 2020-05-26 | 2023-10-24 | Epiroc Rock Drills Ab | Loading Assembly and Method for Preparing Boreholes for a Blasting Operation |
| CN112036957B (en) * | 2020-09-08 | 2023-11-28 | 广州图普网络科技有限公司 | Visitor retention number determining method and device, electronic equipment and storage medium |
| SE546002C2 (en) * | 2020-10-22 | 2024-04-09 | Luossavaara Kiirunavaara Ab | A blasting system and a method of explosive material charging |
| CN115218733B (en) * | 2022-06-02 | 2023-08-11 | 青岛理工大学 | Deep hole blasting device and application method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3070011A (en) * | 1960-07-11 | 1962-12-25 | Jersey Prod Res Co | Directional drilling with explosive charges |
| US3246602A (en) * | 1964-07-09 | 1966-04-19 | Gulf Oil Corp | Explosive cartridge with rigid closure means |
| DE1453824C3 (en) * | 1965-05-15 | 1974-06-12 | Dynamit Nobel Ag, 5210 Troisdorf | Drive cartridge for powder-powered devices for commercial use |
| US3511538A (en) * | 1968-07-08 | 1970-05-12 | Hercules Inc | Apparatus and process for excavating with explosives |
| US3722411A (en) * | 1970-12-21 | 1973-03-27 | Herters Inc | Plastic shotshell with sealing rings |
| SE408594B (en) * | 1975-06-09 | 1979-06-18 | Nitro Nobel Ab | DEVICE FOR INFORMATION OF EXPLOSION CAPSULES IN DRILLS |
| SE465566B (en) * | 1989-09-21 | 1991-09-30 | Nitro Nobel Ab | Feed device for flexible tubes or rods and a loading unit comprising this device |
| SE503414C2 (en) * | 1994-10-07 | 1996-06-10 | Actuelle Tricot I Boras Ab | Cleaning cloth for wiping dirty surfaces and using this cleaning cloth on a mop for cleaning dirty surfaces |
| SE504200C2 (en) * | 1995-03-23 | 1996-12-02 | Bofors Liab Ab | Method and apparatus for applying reinforcement charges to boreholes |
-
2000
- 2000-07-03 NO NO20003438A patent/NO314914B1/en not_active IP Right Cessation
-
2001
- 2001-06-29 AU AU2001266433A patent/AU2001266433B2/en not_active Ceased
- 2001-06-29 WO PCT/NO2001/000276 patent/WO2002003021A1/en active IP Right Grant
- 2001-06-29 AU AU6643301A patent/AU6643301A/en active Pending
- 2001-06-29 US US10/312,501 patent/US20050161257A1/en not_active Abandoned
- 2001-06-29 CA CA002415221A patent/CA2415221A1/en not_active Abandoned
- 2001-06-29 KR KR1020037000078A patent/KR100768278B1/en active IP Right Grant
- 2001-06-29 JP JP2002508041A patent/JP4430300B2/en not_active Expired - Lifetime
-
2002
- 2002-12-27 SE SE0203885A patent/SE523877C2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030032994A (en) | 2003-04-26 |
| NO20003438L (en) | 2002-01-04 |
| SE0203885L (en) | 2003-02-04 |
| AU6643301A (en) | 2002-01-14 |
| NO20003438D0 (en) | 2000-07-03 |
| JP2004502917A (en) | 2004-01-29 |
| US20050161257A1 (en) | 2005-07-28 |
| KR100768278B1 (en) | 2007-10-18 |
| NO314914B1 (en) | 2003-06-10 |
| WO2002003021A1 (en) | 2002-01-10 |
| SE523877C2 (en) | 2004-05-25 |
| SE0203885D0 (en) | 2002-12-27 |
| JP4430300B2 (en) | 2010-03-10 |
| AU2001266433B2 (en) | 2006-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |