WO2025114641A1

WO2025114641A1 - A positioning device and an arrangement for positioning an antenna of a wireless initiation device of a primer unit

Info

Publication number: WO2025114641A1
Application number: PCT/FI2024/050640
Authority: WO
Inventors: Anssi MYKKÄNEN
Original assignee: Normet Oy
Current assignee: Normet Oy
Priority date: 2023-11-28
Filing date: 2024-11-27
Publication date: 2025-06-05
Anticipated expiration: 2026-05-28
Also published as: FI131781B1; FI20236312A1

Abstract

An arrangement (200) for positioning an antenna (101) of a wireless initiation device (102) comprises a charging boom (121) and a charging hose (116), wherein the charging boom (121) is configured to insert a positioning device (100) into the borehole (106) and guide the charging hose (116) into the borehole (106) with an explosive dose. The charging hose (116) is delivered through the positioning device (100) and provide an explosive dose (123) into the borehole (106) and then extract the charging hose (116) away from the borehole (106) through the elongated tube (107) of the positioning device (100) after the explosive dose is provided into the borehole (106). In addition, the arrangement arranges the positioning device (100) into a mouth (124) of the borehole (106) and so to position or directing the antenna (101) essentially away from the rock face of the borehole, advantageously towards the transmitter (113). Advantageously, the arrangement performs all those steps in one and the same back and forth movement of the charging boom (121) or the charging hose (116).

Description

A POSITIONING DEVICE AND AN ARRANGEMENT FOR POSITIONING AN ANTENNA OF A WIRELESS INITIATION DEVICE OF A PRIMER UNIT

TECHNICAL FIELD OF THE INVENTION

The invention relates to a positioning device for positioning an antenna of a wireless initiation device of a primer unit and an arrangement for positioning the antenna of the wireless initiation device of the primer unit.

BACKGROUND OF THE INVENTION

It is known to use wireless initiation devices for activating primer units, where the wireless initiation device comprises a receiver antenna for receiving an initiation command in a wireless way outside from the initiation device so from a transmitter. The wireless initiation device is coupled with the primer unit or to a detonator by a detonator cord, which is used for transporting an initiating signal from the wireless initiation device to the primer unit e.g. in a borehole in a rock. The primer unit typically comprises at least the detonator, but usually also a booster. The detonator cord is coupled with the detonator and may be e.g. a shock tube or an electric fusehead for initiating the detonator. Very often the detonator cords are bound and bundled together and fed along a blasting site to the initiation device. The wireless initiation devices may also be used for receiving energy in a wireless manner outside from the initiation device, whereupon the received energy is usually stored to an energy storage for providing initiation energy to the initiation member after charged. However, also the receiving antennas are used in these applications.

There are however some disadvantages relating to the known methods, namely the wireless initiation device usually does not receive the signal from the transmitter in the most efficient way. In some cases, especially if the receiver antenna is oriented towards the rock face, the initiation energy and signal transfer may be even prevented completely. Positioning of the wireless initiation device (or the antenna) to an uneven rock face is also technically challenging and it should not take much time as time consumed per one borehole will multiply process cycle time when tens of boreholes is charged per one face (50-150 boreholes per face). Positioning of the wireless initiation device should be fast and reliable and most likely combined to mechanized and remotely done charging process.

SUMMARY OF THE INVENTION

An object of the invention is to alleviate and eliminate the problems relating to the known prior art. Especially the object of the invention is to provide a device, arrangement, and method for positioning a receiver antenna of a wireless initiation module of a primer unit to be installed into a borehole so, that the wireless initiation module or its’ receiver antenna does not hang freely or arbitrarily outside the borehole and that an orientation of the receiver antenna towards the borehole or any other unwanted direction can be avoided. In addition, the object of the invention is to position the receiver antenna in a fast and reliable way.

The object of the invention can be achieved by the features of independent claims.

The invention relates to a positioning device for positioning an antenna according to claim 1. In addition, the invention relates to an arrangement for positioning the antenna according to claim 11 , and a method for positioning the antenna according to claim 19.

According to an embodiment of the invention a positioning device for positioning an antenna of a wireless initiation device of a primer unit to be installed into a borehole comprises an elongated tube having a distal end and a proximal end. The positioning device is configured to be inserted into the borehole, so to the same borehole as the primer unit and the explosive dose. The positioning device is also configured to be supported to an inner wall of the borehole thereby fastening the elongated tube of the positioning device to the inner wall of the borehole.

The elongated tube is also configured to guide a detonator cord, such as a shock tube or electric wire, between the proximal and distal ends of the elongated tube during installation of the primer unit to the borehole. In particular, the proximal end of the elongated tube comprises a positioning construction, wherein said positioning construction receives and positions the antenna essentially away from the distal portion of the elongated tube when the detonator is installed, so essentially away from a rock face of the borehole. The positioning construction comprises advantageously at least a first surface, such as a wing, pointing essentially to a different direction than the distal end of the elongated tube. An angle between the first surface, so the direction to which the antenna is directed, and the rock face of the borehole is in a range of 90-180° so the antenna is advantageously directed away from the distal end of the elongated tube and thus away from the rock surface when inserted into the borehole. According to an embodiment the angle of the normal of the first surface is adjustable, such as allowing pointing the antenna essentially towards a transmitter when the positioning device is inserted into the borehole.

According to an advantageous embodiment the wireless initiation device with the (receiver) antenna is pre-assembled to the detonator cord, such as the shock tube, already on an explosive factory e.g. to better secure a water proof and high quality fuse end contact to the detonator cord. The wireless initiation device with the antenna, or at least the antenna, can be then either assembled to the positioning construction of the positioning device at the same factory or then at the site before delivery to the borehole. The site assembly is advantageously easy “snap and deliver¹’ type. However, the positioning on the antenna is performed at the site.

According to an embodiment, the positioning device is picked by a charging boom. The charging boom may comprise e.g. a mount at the free end of the boom, or other fastening device for receiving and fastening the positioning device to the charging boom for the inserting the distal end of the elongated tube of the positioning device into the borehole. The fastening device, such as the mount, is configured to release the positioning device from the charging boom after inserting the positioning device or after extracting a charging hose away from the borehole.

According to an embodiment, the elongated tube of the positioning device comprises a holder element for receiving and holding the primer unit during installation of the positioning device. The elongated tube, or the holder element, is configured to release the primer unit, when it is installed. The holder element is arranged advantageously between the proximal and distal ends, or preferably in the distal end of the elongated tube, and it comprises an opening, or a tunnel, essentially on a longitudinal axis of the elongated tube for the primer unit. According to an example, the charging hose may catch the primer unit from the holder, when pushed through the elongated tube. According to an example, the charging hose may catch the holder element with the primer unit, or even the distal portion of the elongated tube together with the holder element and primer unit. If the charging hose catches the entire distal portion, the elongated tube advantageously comprises a breaking point or line/path) between the holder element and the proximal end so that the elongated tube is configured to be broken at the breaking point during the installation of the primer unit. This may have additional advantage, namely the separated distal end of the elongated tube may smoothly deliver the primer unit inside the distal end so that the primer unit does not get stuck so easily with the inner surface of the borehole.

It is to be noted that when the primer unit is delivered, also the detonator cord is delivered at the same, because another end of the detonator cord is coupled with the detonator of the primer unit. According to an embodiment, the proximal portion of the elongated tube comprises a spooling device for carrying the detonator cord, whereupon the detonator cord is unwind from the spooling device during the installation of the primer unit.

According to an embodiment, an arrangement comprising a charging boom and a charging hose, which are used for positioning the antenna of the wireless initiation device. The arrangement advantageously comprises a pattern recognition device, such as a camera with suitable software, for recognition the borehole to which the positioning device is to be installed. In addition, or alternatively, the arrangement may also comprise a drilling pattern map with coordinates of the holes, whereupon the arrangement is arranged to move the charging boom together with the positioning device into the mount of the borehole and again to insert the distal end of the elongated tube of the positioning device into the borehole based on a guidance of the pattern recognition device and/or the drilling pattern map. Naturally, at least portion of the movement of the charging boom with the positioning device can be performed manually.

Furthermore, the arrangement is advantageously configured to guide the charging hose into the borehole through the elongated tube of the positioning device. The charging hose is used to provide an explosive dose into the borehole, after which the charging hose is extracted away from the borehole through the elongated tube of the positioning device. In addition, the arrangement is configured to arrange the proximal end of the elongated tube into a mouth of the borehole and position or directing the antenna essentially away from the distal portion of said elongated tube, so away from the borehole and advantageously towards the transmitter. According to an embodiment, the arrangement may comprise or receive a location and/or direction data of a transmitter, whereupon the arrangement can arrange the proximal end of the elongated tube into the mouth of the borehole and position and direct the antenna of the wireless initiation device essentially towards the transmitter. The head of the charging boom may e.g. turn the positioning device around its’ longitudinal axis and/or bend or twist the positioning construction, such as a wing, so that the antenna is directed essentially towards the transmitter.

According to an example the arrangement may comprise a direction determination device for determining the direction to the transmitter. The transmitter may e.g. transmit characteristic transmission advantageously with a different wavelength than the initiation commands or energy transmission, whereupon the direction determination device can determined the direction of the transmission and this also the direction of the transmitter. The direction determination device may be arranged e.g. in the charging boom, which is used to install the positioning device to the borehole. Advantageously the direction determination device is arranged to the distal end of the charging boom, whereupon it is close to the wireless initiation device and the directing of the antenna is more accurate.

The arrangement may also perform other steps, such as, according to an example, to code parameters related to explosion to the wireless initiation device during installation of the positioning device having wireless initiation device, such as delays or information of the explosive dose, such as mass or composition of the explosive dose provided by the charging hose.

The present invention offers advantages over the known prior art, such as described in this document. Especially the positioning device ensures that the antenna of the wireless initiation device is directed away from the rock surface of the borehole. In addition, the invention enables to instal the positioning device and thereby arrange the antenna in a desired way by the charging boom and the charging hose without any manually performed steps, whereupon the final result is reliable and achieved in a safe way because there is no need for a human being to provide the primer unit, nor explosive dose, but neither positioning or directing the antenna of the wireless initiation device. Also, the use of the charging boom and charging hose allows to insert the positioning device, deliver the primer unit, as well as providing the explosive dose and in addition to position and direct the antenna by the same one back and forth movement of the charging boom and hose, which also fastens the installation process dramatically in relation to know prior art methods.

The exemplary embodiments presented in this text are not to be interpreted to pose limitations to the applicability of the appended claims. The verb "to comprise" is used in this text as an open limitation that does not exclude the existence of also unrecited features. The features recited in depending claims are mutually freely combinable unless otherwise explicitly stated.

The novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific example embodiments when read in connection with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Next the invention will be described in greater detail with reference to exemplary embodiments in accordance with the accompanying drawings, in which:

Figures 1-10 illustrate a principle of exemplary positioning devices and arrangements for positioning an antenna of a wireless initiation device of a primer unit according to an advantageous embodiment of the invention, and

Figures 11 illustrates an exemplary principle for positioning antennas of wireless initiation devices towards the transmitter according to an advantageous embodiment of the invention, and

Figures 12 illustrates an exemplary method for positioning an antenna of a wireless initiation device of a primer unit according to an advantageous embodiment of the invention. DETAILED DESCRIPTION

Figures 1-10 illustrates a principle of exemplary positioning devices 100 and arrangements 200 for positioning an antenna 101 of a wireless initiation device 102 of a primer unit 103 according to an advantageous embodiment of the invention. The primer unit 103 comprises typically a booster 104 and a detonator 105 as a one packet to be installed into a borehole 106. The positioning device 100 comprises advantageously an elongated tube 107 having a distal end 108 and a proximal end 109, as can be seen in Figures 1- 8. The elongated tube 107 can be easily made e.g. by 3D printing or moulding, as can be seen in Figure 3.

The proximal end 109 of the elongated tube 107 comprises a positioning construction 112, as is depicted e.g. in schematic Figures 9-10. The purpose of the positioning construction 112 is to position or directing the antenna 101 essentially away from the distal end 108 of the elongated tube 107 at least when the primer unit 103 is installed so away from the borehole and advantageously towards the transmitter 113. The positioning construction 112 may comprise at least a first surface, such as a wing 112, pointing essentially to a different direction than the distal end 108 of the elongated tube 107. An angle or between a normal 129 ofthe first surface, or the direction to which the antenna is directed by the first surface, and a transverse axis 128 being perpendicular to the elongated axis 115 of the elongated tube is in a range of 0-180° away from the transverse axis, advantageously in the range of 30-150° so away from the rock face when the elongate tube is inserted into the borehole 106 (the angle a between a normal 129 and the transverse axis 128 is 0° is when the normal 129 is pointing same direction than the transverse axis 128, and -90° when the normal 129 is pointing towards the transverse axis 128, so against the rock face in the case when the elongate tube is inserted into the borehole 106).

The angle of the normal 129 of the first surface is advantageously adjustable around the hinge 130, thus allowing pointing the antenna 101 essentially towards a transmitter 113 when the positioning device 100 is inserted into the borehole 106. Advantageously the antenna is directed essentially to a different direction than the distal end of the elongated tube, so away from the rock face of the borehole when the positioning device is installed.

The elongated tube 107 comprises also a holder element 114 advantageously between the proximal and distal ends, or preferably in the distal end. The holder element 114 comprises an opening or a tunnel essentially on a longitudinal axis 115 of the elongated tube 100 for receiving and holding the primer unit 103 during the installation of the positioning device 100. The elongated tube 107 or the holder element is configured to release the primer unit 103 during the installation of the primer unit 103 so in practise when the charging hose 116 is pushed through the elongated tube.

As can be seen e.g. in the schematic Figures 9-10, the positioning device 100 is inserted into the borehole 106 and supported to an inner wall 110 of the borehole 106 with protrusion members 1 18, such as teeth. The elongated tube 107 guides a detonator cord 111 , so e.g. a shock tube or electric wire from the proximal end 109 towards the distal end 108 during the installation of the primer unit 103 to the borehole 106. The detonator cord 1 11 connects the detonator 105 and the wireless initiation device 102 and is spooled in a spooling device 119. The spooling device is implemented e.g. three projecting wings. The spooling device 119 advantageously unwinds the detonator cord 111 during the installation of the primer unit 103 to the bottom of the borehole 106.

As can be seen in Figure 5 and 9-10, the elongated tube 107 receives the charging hose 116 from the proximal end 109 of the elongated tube 107 and guides the charging hose 116 through the elongated tube and also through the opening of the holder element. The positioning device 100 or the holder element 1 14 releases the primer unit 103 and allows the charging hose 116 to catch the primer unit 103, when the charging hose 1 16 is travelling from the proximal end 109 towards the distal end 108 of the elongated tube of the positioning device. It is to be noted that the holder element 114 may release the primer unit 103 to the charging hose 1 16, or the charging hose 116 may catch also the holder element 114 together with the primer unit 103. In the latter case the elongated tube advantageously comprises a breaking point 117 (or breaking line) between the holder element 114 and the proximal end 109 so that the elongated tube breaks at the breaking point 117 during the installation of the primer unit 103, so that the distal end 108 and the holder element 114 together with the primer unit 103 is separated from the rest of the elongated tube, so the proximal end, during the installation of the primer unit 103.

The positioning device comprises protrusion members 118, such as teeth, which are advantageously tilted towards the proximal end of the elongated tube so that the insertion of the elongated tube into the borehole is easier. The protrusion members 118 are configured to be supported against the inner wall 110 of the borehole 106 and the thereby fasten the elongated tube of the positioning device to the inner wall of the borehole. The protrusion members 118 may also be retracted during insertion of the elongated tube into the borehole, whereupon the insertion is even more easier, and whereupon the protrusion members 118 are configured to be protruded out from the elongated tube 107 and against the borehole, when the charging hose 116 is guided through the elongated tube 107 from the proximal end 109 towards the distal end 108.

The positioning device 100 comprises advantageously also a fastening device 120, such as click-type or hooks or the like, as can be seen e.g. in Figure 6, which connects the positioning device with a charging boom 121 in a releasable manner. The charging boom 121 moves and presses and retains the elongated tube 107 against the borehole during the installation of the primer unit 103 to the borehole 106 and when the charging hose is extracted away from the borehole after providing the explosive dose, and also the boom is taken away, the protrusion members 118 keeps the positioning device in the hole 106 and the fastener device 120 releases the charging boom 121 from the positioning device 100. Also the charging boom 121 may comprise a fastening device 125 for receiving and fastening the positioning device 100 to the charging boom 121 for inserting the distal end 108 of the elongated tube 107 of the positioning device 100 into the borehole 106, wherein the fastening device 125 is configured to release the positioning device 100 from the charging boom 121 after extracting the charging hose 116 away from the borehole 106.

The positioning may also comprise a groove 122 to guide the detonator cord 111 through the elongated tube 107 between the proximal end and the distal end during the installation of the primer unit 103 to the borehole and to provide space for the detonator cord 111 when extracting the charging hose 116 away from the borehole and through the positioning device. Alternatively, the diameter of the elongated tube may be so large that there is space enough for both the detonator cord 111 and the charging hose 116. It is to be understood that different sizes (diameter and/or length) of the elongated tubes 107 may be needed for different size of boreholes 106. Figures 4, 5, and 8-10 illustrate exemplary arrangements for positioning the antenna 101 of the wireless initiation device 102 of a primer unit 103 according to an advantageous embodiment of the invention. As can be seen, the arrangement comprises a charging boom 121 and a charging hose 116. The charging boom 121 receives the positioning device 100 in its’ distal end and inserts at least the distal end 108 of the elongated tube 107 of the positioning device 100 into the borehole 106, so to the same borehole as the primer unit 103 is to be installed. The charging boom guides the charging hose 116 into the borehole 106 through the elongated tube 107 of the positioning device 100, provides an explosive dose 123 into the borehole 106 and after this extracts the charging hose 116 away from the borehole 106 through the elongated tube 107 of the positioning device 100. In addition, the arrangement, so in practise the charging boom 121 arranges also the proximal end 109 of the elongated tube 107 into the mouth 124 of the borehole 106 and so to position or directing the antenna 101 essentially away from the distal portion 108 of said elongated tube 107 or in practise away from the borehole 106 or from the rock face and advantageously towards the transmitter 113. Advantageously, the arrangement performs all steps by one and same back and forth movement of the charging boom 121 and the charging hose 116.

It is to be noted the charging boom 121 keeps the positioning device 100 stationary in relation to the borehole 106 during extracting the charging hose 116 away from the borehole.

The charging boom 121 guides the charging hose 116 into the borehole 106 through the elongated tube 107, as can be seen especially in Figures 4, 5, and 8-10. Depending on the implementation the charging hose 1 16 can be delivered through the holder element 114 so to catch the primer unit 103 by the charging hose 116, or the charging hose can catch both the holder element 114 together with the prime unit 103. The primer unit 103 advantageously comprises the booster 104 and the detonator 105, which is coupled with a detonator cord 111 to the wireless initiation device 102. Thus, the charging hose 1 16 advantageously catch primer unit 103, deliver the primer unit 103 into the borehole 106, and at the same drags also the detonator cord 111. The detonator cord 111 is arranged into the spooling device 119, which unwinds the detonator cord 111 when the charging hose 116 drags the detonator cord 111 through the elongated tube 107 towards the bottom of the borehole 106.

The arrangement advantageously comprises also a pattern recognition device 126, such as a camera with suitable software, for recognition the borehole 106 to which the positioning device 100 is to be installed. The arrangement may also comprise a drilling pattern map 127 with coordinates of the holes. Thus, the arrangement advantageously moves the charging boom 121 with the positioning device 100 into the mount 124 of the borehole 106 based on a guidance of the pattern recognition device 126 and/or the drilling pattern map 127. The arrangement also inserts the distal end 108 of the elongated tube 107 of the positioning device 100 into the borehole 106 based on the information.

The arrangement may also comprise or receive a location and/or direction data of a transmitter 113. The arrangement may comprise a direction detection device 131 for determining the direction to the transmitter 113. The transmitter may e.g. transmit characteristic transmission advantageously with a different wavelength than the initiation commands or energy transmission so that the direction detection device 131 is able to recognise the transmitter 113 and the direction to the transmitter 113. Thus, the arrangement may arrange the proximal end 109 of the elongated tube 107 into the mouth 124 of the borehole 106 and positioning and directing the antenna 101 of the wireless initiation device 102 essentially towards the transmitter 113. The charging boom may e.g. turn the positioning device advantageously around its’ longitudinal axis 115 and/or twist or turn the positioning construction 112 so that the first surface or at least the antenna 101 is then directed essentially towards the transmitter 113.

Further, the arrangement may also comprise a coding device 132 to code parameters related to explosion to the wireless initiation device 102 during the installation of the positioning device 100 having the wireless initiation device 102. The parameters may relate e.g. to delays or characters of the explosive dose used.

Figures 11 illustrates an exemplary principle for positioning antennas 101 of wireless initiation devices 102 towards the transmitter 113 according to an advantageous embodiment of the invention.

Figures 12 illustrates an exemplary method 300 for positioning an antenna of a wireless initiation device of a primer unit according to an advantageous embodiment of the invention, wherein in step 301 the detonator cord 111 is pre-assembled to the wireless initiation device 102 and advantageously also to the spooler device. The pre-assembly is advantageously implemented on an explosive factory to secure waterproof and high-quality contacts to the detonator cord 111. The primer unit 103 can then be assembled in step 302 to the holder element and possibly also to the detonator cord 111 at the same factory or at site before the delivery to borehole 106. The positioning device 100 with the primer unit 103 coupled with the detonator cord 111 is then coupled with the charging boom 121 in step 303. In step 304 the charging boom 121 carrying the positioning device + primer unit is moved to the borehole. In step 305, at least the distal end 108 of the elongated tube 107 of the positioning device is inserted into the borehole 106 by the charging boom 121. In step 306, the charging hose 116 is pushed into the borehole through the elongated tube 107 so to catch at least the primer unit 103. In step 307 the charging hose 116 delivers the primer unit 103 into the bottom of the borehole 106 and at the same drags also the detonator cord 111 , the other end of which is still coupled with the wireless initiation device 102. In step 308 the explosive dose is provided by the charging hose into the borehole 106. In step 309 the charging hose 116 is retracted away from the borehole 106 and at the same the charging boom 121 still keeps the positioning device 100 stationary in relation to the borehole via the fastening device(s). In step 310 the antenna is positioned and directed, advantageously towards the transmitter 113. At the same the direction to the transmitter is also determined. It is to be noted that step 310 may be also in other phase, so just even before inserting the positioning device into the borehole or just after retracting the charging hose. After the charging hose is full retracted out from borehole 106 and explosive dose provided into the borehole, the positioning deice can be released from the charging boom in step 31 1 and the charging boom and the charging hose are moved away and advantageously perform the steps 303-301 again with another positioning device and another borehole.

This method suits particularly well to remote loading method where charging hose is mechanically handled by manipulator boom and charging operator works at distances.

The invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments, but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims. In particularly it is to be noted that e.g. different sizes of positioning devices may be needed for different size of boreholes.

The features recited in dependent claims are mutually freely combinable unless otherwise explicitly stated.

Claims

1 . A positioning device (100) for positioning an antenna (101 ) of a wireless initiation device (102) of a primer unit (103), said primer unit (103) comprising a detonator (105) and advantageously also a booster, said primer unit (103) being to be installed into a borehole (106), wherein the positioning device (100) comprises:

- an elongated tube (107) having a distal end (108) and a proximal end

(109), wherein

- the positioning device (100) is configured to be inserted into the borehole

(106), and supported to an inner wall (110) of the borehole (106) thereby fastening the elongated tube (107) of the positioning device (100) to the inner wall of the borehole, and

- the elongated tube (107) is configured to guide a detonator cord (111 ) between the proximal and distal ends of the elongated tube during the installation of the primer unit (103) to the borehole (106), said detonator cord (111 ) connecting the detonator (105) and the wireless initiation device (102), and wherein

- the proximal end (109) of the elongated tube (107) comprises a positioning construction (112), wherein said positioning construction (112) is configured to receive and position the antenna (101 ) essentially away from the distal end (108) of the elongated tube (107) at least when the primer unit (103) is installed.

2. The positioning device of claim 1 , wherein the positioning construction (112) comprises at least a first surface, such as a wing, pointing essentially to a different direction than the distal end of the elongated tube.

3. The positioning device of any previous claims, wherein the elongated tube comprises a holder element (114), wherein said holder element (114) comprises an opening essentially on a longitudinal axis (115) of the elongated tube (100) for receiving and holding the primer unit (103) during the installation of the positioning device (100), wherein said elongated tube (107) is configured to release said primer unit (103) during the installation of the primer unit (103).

4. The positioning device of claim 3, wherein the elongated tube (107) is configured to receive a charging hose (116) from the proximal end (109) of said elongated tube (107) and guide said charging hose (116) through the elongated tube, whereupon the positioning device (100) is configured to release the primer unit (103) and allowing the charging hose (116) to catch the primer unit (103), when the charging hose (116) is travelling from the proximal end (109) towards the distal end (108) of the elongated tube of the positioning device.

5. The positioning device of any previous claims 3-4, wherein the elongated tube comprises a breaking point (117) between the holder element (114) and the proximal end (109) so that the elongated tube is configured to be broken at the breaking point during the installation of the primer unit (103), so that the distal end (108) and the holder element (1 14) with the primer unit (103) is configured to be separated from the rest of the elongated tube during the installation of the primer unit.

6. The positioning device of any previous claims, wherein the distal end (108) of the elongated tube comprises protrusion members (118), such as teeth, configured to be supported against the inner wall (110) of the borehole (106) and the thereby fasten the elongated tube of the positioning device to the inner wall of the borehole.

7. The positioning device of claim 6, wherein said protrusion members (118) are configured to be protruded out from the elongated tube (107) and against the borehole, when the charging hose (116) is guided through the elongated tube (107) from the proximal end (109) towards the distal end

(108).

8. The positioning device of any previous claims, wherein the proximal end

(109) of the elongated tube comprises a spooling device (119) for carrying the detonator cord (111 ) and wherein the spooling device (119) is configured to unwind the detonator cord (111 ) during the installation of the primer unit (103) to the borehole (106).

9. The positioning device of any previous claims, wherein the positioning device (100) comprises a fastening device (120), which is configured to connect the positioning device with a charging boom (121 ) in a releasable manner.

10. The positioning device of any previous claims, wherein the positioning device comprises a groove (122) to guide the detonator cord (111 ) through the elongated tube between the proximal end and the distal end of the elongated tube during the installation of the primer unit (103) to the borehole and to provide space for the detonator cord (111 ) when extracting the charging hose (116) away from the borehole and through the positioning device.

11. An arrangement (200) for positioning an antenna (101 ) of a wireless initiation device (102), wherein the arrangement comprises:

- a charging boom (121 ) and a charging hose (116), wherein the charging boom (121 ) is configured to:

- receive the positioning device (100) of any of previous claims,

- insert the distal end (108) of the elongated tube (107) of the positioning device (100) into the borehole (106),

- guide the charging hose (116) into the borehole (106) through the elongated tube (107) of the positioning device (100), provide an explosive dose (123) into the borehole (106) and extract the charging hose (116) away from the borehole (106) through the elongated tube (107) of the positioning device (100), and

- arrange the proximal end (109) of the elongated tube (107) into a mouth

(124) of the borehole (106) and so to position the antenna (101 ) essentially away from the distal portion (108) of said elongated tube (107), in one and the same back and forth movement.

12. An arrangement of claim 11 , wherein the charging boom (121 ) is configured to keep the positioning device (100) stationary in relation to the borehole (106) during extracting the charging hose (116) away from the borehole.

13. An arrangement of any of claims 11 -12, wherein the charging boom (121 ) comprises a fastening device (125) for receiving and fastening the positioning device (100) to the charging boom (121 ) for inserting the distal end (108) of the elongated tube (107) of the positioning device (100) into the borehole (106), wherein the fastening device (125) is configured to release the positioning device (100) from the charging boom (121 ) after extracting the charging hose (116) away from the borehole (106).

14. An arrangement of any of claims 11-13, wherein the arrangement is configured to guide the charging hose (1 16) into the borehole (106) through a holder element (114) of the elongated tube (107) of the positioning device (100), where said holder element (114) is configured to hold a primer unit (103) coupled with a detonator cord (1 1 1 ) to the wireless initiation device (102), whereupon the charging hose (1 16) is configured to catch said primer unit (103) and again to deliver said primer unit (103) into the borehole (106) when the charging hose (116) is guided through the elongated tube (107) of the positioning device (100).

15. An arrangement of any of claims 11-14, wherein the arrangement is configured to protrude protrusion members (118), such as teeth, of the elongated tube (107) against the inner wall (110) of the borehole (106), when the charging hose (116) is delivered through the elongated tube (107) from the proximal end (109) towards the distal end (108) of the elongated tube.

16. An arrangement of any of claims 1 1-15, wherein the arrangement comprises a pattern recognition device (126) for recognition the borehole (106) to which said positioning device (100) is to be installed and/or a drilling pattern map (127) with coordinates of the holes, and based on a guidance of the pattern recognition device (126) and/or the drilling pattern map (127) to move the charging boom (121 ) with the positioning device (100) into the mount (124) of the borehole (106) and again to insert said the distal end (108) of the elongated tube (107) of the positioning device (100) into the borehole (106).

17. An arrangement of any of claims 1 1-16, wherein the arrangement comprises or is configured to receive a location and/or direction data of a transmitter (113), whereupon the arrangement is configured to arrange the proximal end (109) of the elongated tube (107) into the mouth (124) of the borehole (106) and positioning and directing the antenna (101 ) of the wireless initiation device (102) essentially towards the transmitter (1 13).

18. An arrangement of any of claims 11-17, wherein the arrangement is configured to code parameters related to explosion to the wireless initiation device (102) during installation of the positioning device (100) having said wireless initiation device (102), such as delays.

19. A method (300) for positioning an antenna (101 ) of a wireless initiation device (102) of a primer unit (103) to be installed into a borehole (106), wherein:

- a positioning device (100) comprising an elongated tube (107) having a distal end (108) and a proximal end (109) is inserted into the borehole

(106), and supported to an inner wall (110) of the borehole (106) thereby fastening the elongated tube (107) of the positioning device (100) to the inner wall (110) of the borehole (106), and

- the elongated tube (107) is used to guide a detonator cord (111 ) between the proximal and distal ends of the elongated tube (107) during the installation of the primer unit (103) to the borehole (106), said detonator cord (111 ) connecting the detonator (105) and the wireless initiation device (102), and

- a positioning construction (112) of the proximal end (109) of the elongated tube (107) is used to position and directing the antenna (101 ) essentially away from the distal portion (108) of the elongated tube

(107) at least when the primer unit (103) is installed.

20. A method of claim 19, wherein

- the positioning device (100) is received by a charging boom (121 ),

- the distal end (108) of the elongated tube (107) of the positioning device

(100) is inserted into the borehole (106) by the charging boom (121 ),

- a charging hose (116) is guided into the borehole (106) through the elongated tube (107) of the positioning device (100), an explosive dose (123) is provided into the borehole (106) and the charging hose (116) is extracted away from the borehole (106) through the elongated tube (107) of the positioning device (100), and

- the proximal end (109) of the elongated tube (107) is arranged into a mouth (110) of the borehole (106) so to positioning the antenna (101 ) essentially away from the distal portion (108) of said elongated tube (107), in one and the same back and forth movement of said charging boom (121 ).