CA1209033A - Plug for blasting hole - Google Patents
Plug for blasting holeInfo
- Publication number
- CA1209033A CA1209033A CA000448150A CA448150A CA1209033A CA 1209033 A CA1209033 A CA 1209033A CA 000448150 A CA000448150 A CA 000448150A CA 448150 A CA448150 A CA 448150A CA 1209033 A CA1209033 A CA 1209033A
- Authority
- CA
- Canada
- Prior art keywords
- expander
- hole
- wall
- plug
- blasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000002023 wood Substances 0.000 claims 1
- 239000002360 explosive Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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
- F42D1/18—Plugs for boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1294—Packers; Plugs with mechanical slips for hooking into the casing characterised by a valve, e.g. a by-pass valve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The disclosure herein describes a plug for use in a blasting hole for retaining a blasting charge in the hole and/or closing the hole, it comprises a cylindrical body and a tapered expander insertable in the central bore of the cylindrical body, the latter being provided with circumferentially spaced longitudi-nal slits extending from the top wall to a distance short of the bottom wall to define on the body a plurality of segmental sections which are forced into contact with the wall of the blasting hole when the expander is hit by a tamper device. When the plug is used for retaining a blasting charge, the slits, being widened as a result of the expansion, form water passages to discharge water from the charge retaining area of the hole.
The disclosure herein describes a plug for use in a blasting hole for retaining a blasting charge in the hole and/or closing the hole, it comprises a cylindrical body and a tapered expander insertable in the central bore of the cylindrical body, the latter being provided with circumferentially spaced longitudi-nal slits extending from the top wall to a distance short of the bottom wall to define on the body a plurality of segmental sections which are forced into contact with the wall of the blasting hole when the expander is hit by a tamper device. When the plug is used for retaining a blasting charge, the slits, being widened as a result of the expansion, form water passages to discharge water from the charge retaining area of the hole.
Description
3~
FIELD OF THE INVENTION
The present invention relates to a plug for use in a blasting hole for closing the hole and, more partisularly, to a plug used in a blasting hole for xetaining a blasting charge in a bottomless blasting hole.
BACKGROUND OF THE INVEN_ION
It is well known to drill holes in the blast-ing of rock, coal or other minerals and to charge the 1~ holes, the blasting charge being usually detonated by an electric current. Blasting plugs are also known of the type having a tapered expander which, under the action of a tamper, forces a cylindrical body into contact with the wall of the blasting hole to thereby prevent the surge of explosive forces directly from the drilled hole.
It has been found that in cases where the drilled holes have an important diameter (for example, a diameter of 4 inches or more) and where the depths of these holes are important (for example, 200 feet or more), it becomes extremely difficult once these holes are caved in to retain the explosive charges for a given time which, in some cases, may be four or five days. At present, there does n~t exist any retaining plug which is suitable for retaining the explosive charges such as explosive sticks, gel explosives, or even granular explosives in order to prevent them from escaping the bottom of the holes. In cases where a lot of drillings are performed, if some - . ~
~3~133 holes are emptied at their bottom as a result of an ineffective retaining member, it is practically impossi-ble to know about it unless it is completely emptied over its entire depth and, still, the chances of locat-ing these holes are practically nil since one can only have access to them from ground level.
In many cases, water collects in the drilled holes; hence, it becomes preferable to have the holes broken through in order to allow discharge of the collect-ed water.
OBJECTS AND STATEMENT OF THE INVENTION
It is an object of this invention to provide a blasting plug which will enable to load a blasting hole even if the latter is bottomless.
It is a further object of the present invention to provide a blasting plug which allows water to dissipate from the charge area of the blasting hole.
It is also an object of the present invention to provide a plug which will allow a decking of detonating charges.
The present invention therefore relates to a plug for use in a blasting hole for retaining a blasting charge in the hole and/or closing the hole which comprises:
a cylindrical body having top, side and bottom walls and a central bore extending from the top wall to a distance short of the bottom wall; the side wall displays a series of circumferentially spaced longitudinal slits extending from the top wall to a distance short of the bottom wall to thereby define on the body a plurality of seg-mental sections; the body further includes a longitudi-nal fuse hole extending from the top wall to the bottom wall. The plug comprises also a tapered expander insert-able in the centxal bore to radially expand, upon tamp-ing, the cylindrical body into contact with the wall of the blasting hole thereby expanding the slits to form water discharging passages to free a blasting charge area from water collected therein. The assembly of the expander and body each include holes for receiving a securing rope used for positioning the assembly in the blasting hole. Elastic means are provided to encircle the side wall of the body for opposing expansion of the segmental sections when the expander is positioned in the bore of the body but yielding upon tamping on the expand-er to allow the segmental sections to contact the wall of the blasting hole.
Other objects and further scope of applicabi-lity of the present invention will become apparent from the detailed description given hereinafter. It should be understood, however, that this detailed description, while indicating preferred embodiments of the invention, is given by way of illustration only since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.
LZ~Q33 BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a plug made in accordance with the present invention;
Figure 2 is an elevation view showing the plug in wall engaging position in a blasting hole; and Figure 3 is an elevation showing a blasting area closed by two vertically spaced plugs.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, the plug of the present invention comprises a cylindrical body, generally denoted 12, and a tapered expander, generally denoted 14.
The cylindrical body has an annular top wall 16, a closed bottom wall 18, an outer side wall 20 and an inner wall 22 defining a central core which extends from the top wall 16 to the bottom 18. The side wall 20 displays a series a circumferentially spaced longitudinal slits 24 which extend from the top wall 16 and terminate at 26 short of the bottom wall 18. In the embodiment illustrated in figure 1, there are four slits shown de-fining four segmental sections 28, 30 32 and 34. The cy-lindrical outer wall 20 includes a circular recess 36 in which is tightly received an elastic band 38 which serves to retain the body in its cylindrical shape. The cylin-drical body also includes a series of rope receiving holes 40, 42 and 44, the function of which will be described hereinbelow. Hole 40 extends from the top wall 16 to the side wall 20 while holes 42 and 44 extend from the outer wall 20 to the bottom wall 18.
A fuse passage hole 46 extends from the top wall 16 through the body of the bottom wall 18.
The expander 14 has a conical shape with a trunkated end 50 having a diameter slightly smaller than the diameter of the inner wall 22 of the cylindrical body. The expander includes a rope receiving hole 52 which extends from its top wall 54 to its side wall 56.
Referring to figure 2, the plug is shown en-gaged in a blasting hole 60 with the expander 14 having been forced into the central bore of the cylindrical body 12 by a tamper device as described hereinbelow. In this engaged position, the peripheral edge of the top wall 16 is forced into contact with the inner wall of the blasting hole. A first rope 62 is shown passing through holes 40, 42 and 44 of the cylindrical body and through hole 52 of the expander, the rope being tied at its lower part adja-cent the bottom wall. Rope 52 is connected at i-ts upper portion to a second rope 64. The ropes have different breakage resistance so that rope 62 may be easily broken under tension while rope 64 will resist such tension.
Hence, when the plug is in position, a sudden pull on rope 64 will cause breakage of rope 62 allowing rope 64 to be recuperated.
One advantage of the present invention is that the plug is particularly useful for bottomless blast-ing holes such as the one shown in figure 3. A first plug ~Z~9~3~3 consisting of the cylindrical body 12 and its expander 14 closes one area of the blasting hole. Water collected in area 60A will be allowed to flow through the slits 24 which are widened when the cylindrical body 12 is in the expanded position. A second plug 12' 14' is lowered in the hole and positioned in contact with the wall of the blasting hole. The positioning of plug 12-1~ and plug 12~-14' will now be described. Each plugislowered in the blast-ing hole by means of inter-connected ropes 62' and 64'.
The distance desired for the proper location of the plugs in the hole may be determined by measuring the length of the rope in the blasting hole. Once the plugs have reached their proper position, a weight 66 to which is connected a rope 68 is dropped in the blasting hole to force the expanders into the central bore of their cylindrical body.
The tamping is carried out until the plugs are secured in place. Thereafter, a sudden pull on ropes64, 64' will dis-connect them from ropes 62, 62'.
In cases where various blasting charges are required, the plug of the present invention allows a deck-ing of blasting areas where various charges 70 are placed in these areas with the corresponding fuse 72 directly connected to ground level.In such decking arrangement, however, more than one fuse hole may be required in a cylindrical body to allow passage of more than one fuse.
Although the invention has been described above with respect to a speciic form, it will be evident to the persons skilled in the art that it may be refined and modified in various ways. It is therefore wished to have it understood that the present invention should not be limited in interpretation except by the terms of the following claims.
FIELD OF THE INVENTION
The present invention relates to a plug for use in a blasting hole for closing the hole and, more partisularly, to a plug used in a blasting hole for xetaining a blasting charge in a bottomless blasting hole.
BACKGROUND OF THE INVEN_ION
It is well known to drill holes in the blast-ing of rock, coal or other minerals and to charge the 1~ holes, the blasting charge being usually detonated by an electric current. Blasting plugs are also known of the type having a tapered expander which, under the action of a tamper, forces a cylindrical body into contact with the wall of the blasting hole to thereby prevent the surge of explosive forces directly from the drilled hole.
It has been found that in cases where the drilled holes have an important diameter (for example, a diameter of 4 inches or more) and where the depths of these holes are important (for example, 200 feet or more), it becomes extremely difficult once these holes are caved in to retain the explosive charges for a given time which, in some cases, may be four or five days. At present, there does n~t exist any retaining plug which is suitable for retaining the explosive charges such as explosive sticks, gel explosives, or even granular explosives in order to prevent them from escaping the bottom of the holes. In cases where a lot of drillings are performed, if some - . ~
~3~133 holes are emptied at their bottom as a result of an ineffective retaining member, it is practically impossi-ble to know about it unless it is completely emptied over its entire depth and, still, the chances of locat-ing these holes are practically nil since one can only have access to them from ground level.
In many cases, water collects in the drilled holes; hence, it becomes preferable to have the holes broken through in order to allow discharge of the collect-ed water.
OBJECTS AND STATEMENT OF THE INVENTION
It is an object of this invention to provide a blasting plug which will enable to load a blasting hole even if the latter is bottomless.
It is a further object of the present invention to provide a blasting plug which allows water to dissipate from the charge area of the blasting hole.
It is also an object of the present invention to provide a plug which will allow a decking of detonating charges.
The present invention therefore relates to a plug for use in a blasting hole for retaining a blasting charge in the hole and/or closing the hole which comprises:
a cylindrical body having top, side and bottom walls and a central bore extending from the top wall to a distance short of the bottom wall; the side wall displays a series of circumferentially spaced longitudinal slits extending from the top wall to a distance short of the bottom wall to thereby define on the body a plurality of seg-mental sections; the body further includes a longitudi-nal fuse hole extending from the top wall to the bottom wall. The plug comprises also a tapered expander insert-able in the centxal bore to radially expand, upon tamp-ing, the cylindrical body into contact with the wall of the blasting hole thereby expanding the slits to form water discharging passages to free a blasting charge area from water collected therein. The assembly of the expander and body each include holes for receiving a securing rope used for positioning the assembly in the blasting hole. Elastic means are provided to encircle the side wall of the body for opposing expansion of the segmental sections when the expander is positioned in the bore of the body but yielding upon tamping on the expand-er to allow the segmental sections to contact the wall of the blasting hole.
Other objects and further scope of applicabi-lity of the present invention will become apparent from the detailed description given hereinafter. It should be understood, however, that this detailed description, while indicating preferred embodiments of the invention, is given by way of illustration only since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.
LZ~Q33 BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a plug made in accordance with the present invention;
Figure 2 is an elevation view showing the plug in wall engaging position in a blasting hole; and Figure 3 is an elevation showing a blasting area closed by two vertically spaced plugs.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, the plug of the present invention comprises a cylindrical body, generally denoted 12, and a tapered expander, generally denoted 14.
The cylindrical body has an annular top wall 16, a closed bottom wall 18, an outer side wall 20 and an inner wall 22 defining a central core which extends from the top wall 16 to the bottom 18. The side wall 20 displays a series a circumferentially spaced longitudinal slits 24 which extend from the top wall 16 and terminate at 26 short of the bottom wall 18. In the embodiment illustrated in figure 1, there are four slits shown de-fining four segmental sections 28, 30 32 and 34. The cy-lindrical outer wall 20 includes a circular recess 36 in which is tightly received an elastic band 38 which serves to retain the body in its cylindrical shape. The cylin-drical body also includes a series of rope receiving holes 40, 42 and 44, the function of which will be described hereinbelow. Hole 40 extends from the top wall 16 to the side wall 20 while holes 42 and 44 extend from the outer wall 20 to the bottom wall 18.
A fuse passage hole 46 extends from the top wall 16 through the body of the bottom wall 18.
The expander 14 has a conical shape with a trunkated end 50 having a diameter slightly smaller than the diameter of the inner wall 22 of the cylindrical body. The expander includes a rope receiving hole 52 which extends from its top wall 54 to its side wall 56.
Referring to figure 2, the plug is shown en-gaged in a blasting hole 60 with the expander 14 having been forced into the central bore of the cylindrical body 12 by a tamper device as described hereinbelow. In this engaged position, the peripheral edge of the top wall 16 is forced into contact with the inner wall of the blasting hole. A first rope 62 is shown passing through holes 40, 42 and 44 of the cylindrical body and through hole 52 of the expander, the rope being tied at its lower part adja-cent the bottom wall. Rope 52 is connected at i-ts upper portion to a second rope 64. The ropes have different breakage resistance so that rope 62 may be easily broken under tension while rope 64 will resist such tension.
Hence, when the plug is in position, a sudden pull on rope 64 will cause breakage of rope 62 allowing rope 64 to be recuperated.
One advantage of the present invention is that the plug is particularly useful for bottomless blast-ing holes such as the one shown in figure 3. A first plug ~Z~9~3~3 consisting of the cylindrical body 12 and its expander 14 closes one area of the blasting hole. Water collected in area 60A will be allowed to flow through the slits 24 which are widened when the cylindrical body 12 is in the expanded position. A second plug 12' 14' is lowered in the hole and positioned in contact with the wall of the blasting hole. The positioning of plug 12-1~ and plug 12~-14' will now be described. Each plugislowered in the blast-ing hole by means of inter-connected ropes 62' and 64'.
The distance desired for the proper location of the plugs in the hole may be determined by measuring the length of the rope in the blasting hole. Once the plugs have reached their proper position, a weight 66 to which is connected a rope 68 is dropped in the blasting hole to force the expanders into the central bore of their cylindrical body.
The tamping is carried out until the plugs are secured in place. Thereafter, a sudden pull on ropes64, 64' will dis-connect them from ropes 62, 62'.
In cases where various blasting charges are required, the plug of the present invention allows a deck-ing of blasting areas where various charges 70 are placed in these areas with the corresponding fuse 72 directly connected to ground level.In such decking arrangement, however, more than one fuse hole may be required in a cylindrical body to allow passage of more than one fuse.
Although the invention has been described above with respect to a speciic form, it will be evident to the persons skilled in the art that it may be refined and modified in various ways. It is therefore wished to have it understood that the present invention should not be limited in interpretation except by the terms of the following claims.
Claims (10)
1. A plug for use in a blasting hole for re-taining a blasting charge in said hole and/or closing said hole comprising:
- a cylindrical body having a top and a bottom wall and a central bore extending from said top wall to a distance short of said bottom wall; said side wall displaying a series of circumferentially spaced longitudinal slits extending from said top wall to a distance short of said bottom wall to thereby define, on said body, a plurality of segmental sections; said body including a longitudinal fuse hole extending through said body from said top wall to said bottom wall;
- a tapered expander insertable in said central bore to radially expand, upon tamping, said body into contact with the wall of the blasting hole thereby expanding said slits to form water passages to free a blasting charge area in said blasting hole from water collected in said area; said expander and said body each including holes for receiving a securing rope used for positioning said expander and said body at a predetermin-ed depth in said blasting hole; and - elastic means encircling said side wall of said body for opposing expansion of said segmental sections when said expander is positioned in the bore of said body for lowering in said hole but yielding upon tamping on said expander to allow said segmental sections to contact the wall of said blasting hole.
- a cylindrical body having a top and a bottom wall and a central bore extending from said top wall to a distance short of said bottom wall; said side wall displaying a series of circumferentially spaced longitudinal slits extending from said top wall to a distance short of said bottom wall to thereby define, on said body, a plurality of segmental sections; said body including a longitudinal fuse hole extending through said body from said top wall to said bottom wall;
- a tapered expander insertable in said central bore to radially expand, upon tamping, said body into contact with the wall of the blasting hole thereby expanding said slits to form water passages to free a blasting charge area in said blasting hole from water collected in said area; said expander and said body each including holes for receiving a securing rope used for positioning said expander and said body at a predetermin-ed depth in said blasting hole; and - elastic means encircling said side wall of said body for opposing expansion of said segmental sections when said expander is positioned in the bore of said body for lowering in said hole but yielding upon tamping on said expander to allow said segmental sections to contact the wall of said blasting hole.
2. A plug as defined in claim 1, wherein said slits are equally spaced on said side wall.
3. A plug as defined in claim 1, wherein said side wall includes a peripheral recess to receive said elastic means therein.
4. A plug as defined in claim 3, wherein said elastic means consists of rubber band.
5. A plug as defined in claim 1, wherein said body and said expander are made of wood.
6. A plug as defined in claim 1, wherein the hole in said expander for receiving a securing rope extends from a top wall thereof to a side wall thereof.
7. A plug as defined in claim 1 or 6, wherein the hole in said body for receiving a securing rope includes a first portion extending from said top wall to said side wall and a second portion extending from said side wall to said bottom wall.
8. A plug as defined in claim 1, wherein said expander has a conical shape.
9. A blasting plug assembly for use in a blasting hole comprising, in combination:
- a cylindrical body having a top, side and a bottom wall and a central bore extending from said top wall to a distance short of said bottom wall; said side wall displaying a series of circumferentially spaced longitudinal slits extending from said top wall to a distance short of said bottom wall to thereby define, on said body, a plurality of segmental sections; a longitu-dinal fuse hole extending through said body from said top wall to said bottom wall;
- a detonating fuse extending through said longitudinal hole;
- a tapered expander insertable in said central bore; said expander and said body each including holes for receving a securing rope therethrough for posi-tioning said expander and said body in said blasting hole;
- a securing rope extending through said last-mentioned holes in said expander and said body;
- a tamper adapted to be dropped in said blasting hole to contact the top surface of said expander to thereby radially expand said body into contact with the wall of said blasting hole thereby expanding said slits to form water discharging passages; and - elastic means encircling said side wall of said body for opposing expansion of said segmental sections when said expander is positioned in the bore of said body but yielding upon tamping upon said expander to permit said segmental sections to contact the wall of said blasting hole.
- a cylindrical body having a top, side and a bottom wall and a central bore extending from said top wall to a distance short of said bottom wall; said side wall displaying a series of circumferentially spaced longitudinal slits extending from said top wall to a distance short of said bottom wall to thereby define, on said body, a plurality of segmental sections; a longitu-dinal fuse hole extending through said body from said top wall to said bottom wall;
- a detonating fuse extending through said longitudinal hole;
- a tapered expander insertable in said central bore; said expander and said body each including holes for receving a securing rope therethrough for posi-tioning said expander and said body in said blasting hole;
- a securing rope extending through said last-mentioned holes in said expander and said body;
- a tamper adapted to be dropped in said blasting hole to contact the top surface of said expander to thereby radially expand said body into contact with the wall of said blasting hole thereby expanding said slits to form water discharging passages; and - elastic means encircling said side wall of said body for opposing expansion of said segmental sections when said expander is positioned in the bore of said body but yielding upon tamping upon said expander to permit said segmental sections to contact the wall of said blasting hole.
10. An assembly as defined in claim 9, where-in said securing rope is formed of two sections; one of said sections extending into the holes of said expander and said body and having one end extending above the top surface of said expander; said rope including a second section connected to said end of said first section;
said connection being such as to permit easy separation between the two sections once the body is plugged into place as a result of said tamper forcing said expander into said bore.
said connection being such as to permit easy separation between the two sections once the body is plugged into place as a result of said tamper forcing said expander into said bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000448150A CA1209033A (en) | 1984-02-23 | 1984-02-23 | Plug for blasting hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000448150A CA1209033A (en) | 1984-02-23 | 1984-02-23 | Plug for blasting hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1209033A true CA1209033A (en) | 1986-08-05 |
Family
ID=4127262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000448150A Expired CA1209033A (en) | 1984-02-23 | 1984-02-23 | Plug for blasting hole |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1209033A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006045144A1 (en) * | 2004-10-27 | 2006-05-04 | Sanleo Holdings Pty Ltd | Platform and a method of locating an object in a borehole |
| WO2009037529A1 (en) * | 2007-09-20 | 2009-03-26 | Koen Alixe Mauritz Dhooge | Blast hole plugging apparatus |
| AU2005299245B2 (en) * | 2004-10-27 | 2010-09-09 | Mintech Pty Ltd | Platform and a method of locating an object in a borehole |
| CN101709933B (en) * | 2009-12-07 | 2013-03-06 | 河海大学 | Compound energy-concentrating blasting cartridge and production method thereof |
| CN103017622A (en) * | 2012-12-18 | 2013-04-03 | 山西大同大学 | Water-resisting returnable multi-stage buffer fractured self-deformation self-latching shot hole stopper |
| US9016320B1 (en) * | 2011-06-30 | 2015-04-28 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Intelligent flow control valve |
-
1984
- 1984-02-23 CA CA000448150A patent/CA1209033A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006045144A1 (en) * | 2004-10-27 | 2006-05-04 | Sanleo Holdings Pty Ltd | Platform and a method of locating an object in a borehole |
| AU2005299245B2 (en) * | 2004-10-27 | 2010-09-09 | Mintech Pty Ltd | Platform and a method of locating an object in a borehole |
| WO2009037529A1 (en) * | 2007-09-20 | 2009-03-26 | Koen Alixe Mauritz Dhooge | Blast hole plugging apparatus |
| CN101709933B (en) * | 2009-12-07 | 2013-03-06 | 河海大学 | Compound energy-concentrating blasting cartridge and production method thereof |
| US9016320B1 (en) * | 2011-06-30 | 2015-04-28 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Intelligent flow control valve |
| CN103017622A (en) * | 2012-12-18 | 2013-04-03 | 山西大同大学 | Water-resisting returnable multi-stage buffer fractured self-deformation self-latching shot hole stopper |
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