CN111141187A - Charging structure and processing method for blind gun for subway shield rock blasting - Google Patents
Charging structure and processing method for blind gun for subway shield rock blasting Download PDFInfo
- Publication number
- CN111141187A CN111141187A CN202010154167.9A CN202010154167A CN111141187A CN 111141187 A CN111141187 A CN 111141187A CN 202010154167 A CN202010154167 A CN 202010154167A CN 111141187 A CN111141187 A CN 111141187A
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- Prior art keywords
- sleeve
- hole
- blind
- gun
- steel wire
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- 238000005422 blasting Methods 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 title claims abstract description 34
- 238000003672 processing method Methods 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 239000002360 explosive Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/043—Connectors for detonating cords and ignition tubes, e.g. Nonel tubes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a charging structure and a processing method for a blind gun for blasting treatment of subway shield rock, which comprises a hole protecting pipe which is arranged in a gun hole and penetrates through the whole depth of the gun hole, wherein a bottom plugging port is arranged in the hole protecting pipe, a charging sleeve and a filling sleeve are sequentially arranged in the hole protecting pipe from bottom to outside, explosives, detonators and a detonating pipe are arranged in the charging sleeve, the first end of the detonating pipe is inserted into the explosives from the bottom end outside the charging sleeve, the second end of the detonating pipe extends out of the gun hole, the filling sleeve is filled with stones, the bottom end of the charging sleeve is connected with a first steel wire which extends out of the gun hole and is used for lifting, and the filling sleeve is connected with a second steel wire which extends out of the gun hole and is used for lifting. The invention has simple and reasonable structural design, can conveniently identify and process blind shots in the subway shield rock blasting, and ensures the safety of later shield construction.
Description
The technical field is as follows:
the invention relates to a charging structure and a processing method for a blind gun in the blasting treatment of subway shield rocks, and belongs to the field of blasting.
Background art:
the blasting method of subway shield rock is to drill hole on ground to the position of subway shield boulder and projected rock and then to blast by charging, and its purpose is to crush the rock in the part of stratum to required block degree by blasting method, so that the shield machine can pass smoothly.
Blind shots inevitably appear in general engineering blasting and have corresponding blind shot processing methods, but the subway shield rock blasting does not have a better method for identifying and processing the blind shots at present, and the blind shot processing methods of common shallow hole and deep hole blasting cannot be suitable for subway shield boulder blasting and outburst rock blasting.
The current measures are basically to prevent blind shots by increasing the number of the detonating detonators in the explosive package and optimizing a detonating network, but the possibility of blind shots still exists; once blind shots are generated during the rock blasting of the subway shield and are not processed, great potential safety hazards and economic losses are caused for later shield construction.
The invention content is as follows:
the invention aims to provide a charging structure and a processing method for treating blind shots in subway shield rock blasting, which can effectively solve the problems of identifying and processing the blind shots in the subway shield rock blasting.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention discloses a charging structure for a blind gun for subway shield rock blasting, which is characterized in that: including locating the big gun hole and running through the hole protecting pipe of whole big gun hole degree of depth and bottom shutoff, it is intraductal from the end outwards to be equipped with the powder charge sleeve pipe in proper order and packs the sleeve pipe to protect the hole, be equipped with explosive, detonator and detonating tube in the powder charge sleeve pipe, inside the first end of detonating tube inserted the explosive from the outside bottom of powder charge sleeve pipe, outside the second end of detonating tube stretches out the big gun hole, it has the stone to pack in the sleeve pipe, the sheathed tube bottom of powder charge is connected with an extension and wears out the first steel wire that the big gun hole was used for carrying and hangs outward, it extends and wears out the second steel wire that the big gun hole was used for carrying and hanging to pack to be.
Furthermore, a metal pipe in a cover shape is arranged between the powder charging sleeve and the filling sleeve, and the opening of the metal pipe faces and covers the upper part of the powder charging sleeve.
Further, the detonator is inserted into the explosive charging sleeve and positioned at the top end of the explosive, and the detonator is fixedly connected with the metal tube.
Furthermore, the metal tube is connected with a third steel wire which extends out of the blast hole and is used for lifting, and the leg wire or the blast pipe of the detonator extends together with the third steel wire and extends out of the blast hole.
Furthermore, the first steel wire and the third steel wire both penetrate through the stuffing sleeve and then extend out of the blast hole.
Further, the length of the stuffer box sleeve ensures access to the blasthole port.
Furthermore, the stuffing sleeve can be divided into a plurality of sections which are connected together end to end, and the length of each section is controlled to be 1-2 meters.
The invention discloses a method for processing a charging structure for a blind shot by subway shield rock blasting, which is characterized by comprising the following steps of: the charging structure for the subway shield rock blasting blind gun comprises a hole protecting pipe which is arranged in a gun hole and penetrates through the depth of the whole gun hole, the bottom of the hole protecting pipe is plugged, a charging sleeve and a filling sleeve are sequentially arranged in the hole protecting pipe from bottom to outside, an explosive, a detonator and a detonating tube are arranged in the charging sleeve, the first end of the detonating tube is inserted into the explosive from the bottom outside the charging sleeve, the second end of the detonating tube extends out of the hole protecting pipe, the filling sleeve is filled with stones, the bottom end of the charging sleeve is connected with a first steel wire which extends out of the gun hole and is used for lifting, and the filling sleeve is connected with a second steel wire which extends out of the gun hole and is used for lifting;
the blind shot identification method comprises the steps of observing a detonating tube extending out of a blast hole after blasting to identify whether the blast hole generates a blind shot, wherein if the detonating tube extending out of the blast hole is exploded, the detonating tube is changed into black gray, which indicates that the explosive and the detonator in the blast hole are exploded; if the detonating tube still keeps the primary color, the blast hole is a blind shot, and the following measures are adopted for processing;
when the blind cannon is processed, the second steel wire connected with the filling sleeve is firstly pulled, the filling sleeve is completely taken out, the first steel wire and the third steel wire connected with the powder filling sleeve and the metal pipe are simultaneously pulled, and the powder filling sleeve is pulled out together, so that the blind cannon can be processed.
Compared with the prior art, the invention has the following effects: the structure design is simple and reasonable, the blind shot in the subway shield rock blasting can be conveniently identified and processed, and the safety of later shield construction is ensured.
Description of the drawings:
FIG. 1 is a schematic construction of an embodiment of the present invention;
in the figure: 1-a hole protecting pipe; 2-a charge sleeve; 3-an explosive; 4-a detonator; 5-a metal tube; 6-a detonating tube; 7-a packing sleeve; 8-pebbles; 9-a first steel wire; 10-a third steel wire; 11-a second steel wire; 12-ground.
The specific implementation mode is as follows:
in order to explain the invention more clearly, the invention will be further explained below with reference to the attached drawings and examples, it being apparent that the drawings listed below are only some specific examples of the invention.
As shown in figure 1, the charging structure and the processing method for the subway shield rock blasting blind cannon comprise a charging structure convenient for the subway shield rock blasting blind cannon processing and an identification and processing method for generating the blind cannon.
The charging structure for the blind gun for the subway shield rock blasting treatment comprises a hole protecting pipe 1 which is arranged in a gun hole A, penetrates through the whole depth of the gun hole and is blocked at the bottom, a charge sleeve 2 and a filling sleeve 7 are sequentially arranged in the hole-protecting pipe 1 from bottom to outside, an explosive 3, a detonator 4 and a detonating tube 6 are arranged in the charge sleeve 2, the first end of the detonating tube 6 is inserted into the explosive from the bottom end outside the explosive charging sleeve, the detonating tube is inserted into the explosive from the bottom end outside the explosive charging sleeve by a length of no less than 200mm, the second end of the detonating tube 6 extends out of the blast hole A, the filling sleeve 7 is filled with stones 8, the stones 8 can be small-grain stones, the bottom end of the charging sleeve 2 is connected with a first steel wire 9 which extends out of the blast hole and is used for lifting, the stuffing sleeve 7 is connected with a second steel wire 11 which extends out of the blast hole and is used for lifting.
A metal pipe 5 in a cover shape is arranged between the powder charging sleeve and the filling sleeve, and the opening of the metal pipe faces and covers the upper part of the powder charging sleeve; the detonator is inserted into the explosive charging sleeve and positioned at the top end of the explosive, and the detonator is fixedly connected with the metal tube.
And a third steel wire 10 which extends out of the blast hole and is used for lifting is connected to the metal pipe, and the third steel wire 10 is used for lifting the metal pipe.
For convenient installation, the first steel wire and the third steel wire penetrate through the stuffing sleeve 7 and then extend out of the blast hole, and the three steel wires for lifting are marked to mark parts connected with the steel wires, so that a user can conveniently check the lifting.
In order to ensure the explosion effect, the length of the stuffing sleeve can ensure that the stuffing sleeve reaches a blast hole opening, the stuffing sleeve can be divided into a plurality of sections and connected together end to end, and the length of each section is controlled to be 1-2 meters.
The invention discloses a method for processing a charging structure for a blind shot by subway shield rock blasting, which is characterized by comprising the following steps of: the charging structure for the subway shield rock blasting blind gun comprises a hole protecting pipe which is arranged in a gun hole and penetrates through the depth of the whole gun hole, the bottom of the hole protecting pipe is plugged, a charging sleeve and a filling sleeve are sequentially arranged in the hole protecting pipe from bottom to outside, an explosive, a detonator and a detonating tube are arranged in the charging sleeve, the first end of the detonating tube is inserted into the explosive from the bottom outside the charging sleeve, the second end of the detonating tube extends out of the hole protecting pipe, the filling sleeve is filled with stones, the bottom end of the charging sleeve is connected with a first steel wire which extends out of the gun hole and is used for lifting, and the filling sleeve is connected with a second steel wire which extends out of the gun hole and is used for lifting;
after blasting, observing a detonating tube extending out of the blast hole to identify whether the blast hole generates a blind shot, wherein if the detonating tube extending out of the blast hole is exploded, the detonating tube becomes black gray, which indicates that the explosive and the detonator in the blast hole are detonated; if the detonating tube still keeps the primary color, the blast hole is a blind shot, and the following measures are adopted for processing;
when the blind cannon is processed, the second steel wire connected with the stuffing sleeve is firstly pulled, the stuffing sleeve is completely taken out, the first steel wire and the third steel wire connected with the powder filling sleeve and the metal pipe are simultaneously pulled, the powder filling sleeve is pulled out together, and the blind cannon can be processed.
Compared with the prior art, the invention has the following effects: the structure design is simple and reasonable, the blind shot in the subway shield rock blasting can be conveniently identified and processed, and the safety of later shield construction is ensured.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. The utility model provides a charging structure that subway shield constructs blind big gun of rock blasting processing and uses which characterized in that: including locating the big gun hole and running through the hole protecting pipe of whole big gun hole degree of depth and bottom shutoff, it is intraductal from the end outwards to be equipped with the powder charge sleeve pipe in proper order and packs the sleeve pipe to protect the hole, be equipped with explosive, detonator and detonating tube in the powder charge sleeve pipe, inside the first end of detonating tube inserted the explosive from the outside bottom of powder charge sleeve pipe, outside the second end of detonating tube stretches out the big gun hole, it has the stone to pack in the sleeve pipe, the sheathed tube bottom of powder charge is connected with an extension and wears out the first steel wire that the big gun hole was used for carrying and hangs outward, it extends and wears out the second steel wire that the big gun hole was used for carrying and hanging to pack to be.
2. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: a metal pipe in a cover shape is arranged between the powder charging sleeve and the filling sleeve, and the opening of the metal pipe faces and covers the upper part of the powder charging sleeve.
3. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: the detonator is inserted into the explosive charging sleeve and positioned at the top end of the explosive, and the detonator is fixedly connected with the metal tube.
4. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: and the metal tube is connected with a third steel wire which extends out of the blast hole and is used for lifting, and the leg wire or the blast guiding tube of the detonator extends together with the third steel wire and penetrates out of the blast hole.
5. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: and the first steel wire and the third steel wire both penetrate through the stuffing sleeve and then extend out of the blast hole.
6. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: the length of the stuffing sleeve ensures access to the blast hole opening.
7. The charging structure for the blind gun for the subway shield rock blasting treatment according to claim 1, wherein: the stuffing sleeve can be divided into a plurality of sections which are connected together end to end, and the length of each section is controlled to be 1-2 meters.
8. A subway shield rock blasting treatment method is characterized in that: the charging structure for treating the blind gun by the subway shield rock blasting comprises a hole protecting pipe which is arranged in a gun hole and penetrates through the depth of the whole gun hole and a bottom plugging port, a charging sleeve and a filling sleeve are sequentially arranged in the hole protecting pipe from bottom to outside, explosive, a detonator and a detonating tube are arranged in the charging sleeve, the first end of the detonating tube is inserted into the explosive from the bottom end outside the charging sleeve, the second end of the detonating tube extends out of the hole protecting pipe, the filling sleeve is filled with stones, the bottom end of the charging sleeve is connected with a first steel wire which extends out of the gun hole and is used for lifting, and a second steel wire which extends out of the gun hole and is used for lifting is connected to the filling sleeve.
9. The subway shield rock blasting method according to claim 8, wherein: the blind shot identification method comprises the steps of observing a detonating tube extending out of a blast hole after blasting to identify whether the blast hole generates a blind shot, wherein if the detonating tube extending out of the blast hole is exploded, the detonating tube is changed into black gray, which indicates that the explosive and the detonator in the blast hole are exploded; if the detonating tube still keeps the primary color, the blast hole is a blind shot, and the following measures are adopted for processing;
the subway shield rock blasting method according to claim 8, wherein: when the blind cannon is processed, the second steel wire connected with the filling sleeve is firstly pulled, the filling sleeve is completely taken out, the first steel wire and the third steel wire connected with the powder filling sleeve and the metal pipe are simultaneously pulled, and the powder filling sleeve is pulled out together, so that the blind cannon can be processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010154167.9A CN111141187A (en) | 2020-03-07 | 2020-03-07 | Charging structure and processing method for blind gun for subway shield rock blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010154167.9A CN111141187A (en) | 2020-03-07 | 2020-03-07 | Charging structure and processing method for blind gun for subway shield rock blasting |
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| Publication Number | Publication Date |
|---|---|
| CN111141187A true CN111141187A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010154167.9A Pending CN111141187A (en) | 2020-03-07 | 2020-03-07 | Charging structure and processing method for blind gun for subway shield rock blasting |
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| CN (1) | CN111141187A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696999A (en) * | 2020-12-30 | 2021-04-23 | 山东科技大学 | Charging device and charging method for deep hole blasting |
| CN115406320A (en) * | 2022-08-30 | 2022-11-29 | 四川中鼎爆破工程有限公司 | Safety device for removing blast hole filler |
| WO2023197391A1 (en) * | 2022-04-14 | 2023-10-19 | 中钢集团马鞍山矿山研究总院股份有限公司 | Cartridge loading method for horizontal hole in broken rock of underground mine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247387A (en) * | 1925-02-14 | 1926-02-18 | Henry Houghton | Shot stemming means or appliances for use in mines, quarries, and the like |
| GB351998A (en) * | 1930-04-02 | 1931-07-02 | Hermann Kruskopf | Improved process of and device for maintaining blasting explosive charges in bore-holes |
| JPH0861900A (en) * | 1994-08-15 | 1996-03-08 | Nippon Koki Co Ltd | Residual explosive powder searching method |
| CN101713624A (en) * | 2009-11-17 | 2010-05-26 | 广东爆破工程有限公司 | Explosion and crushing method for underground concealed rock ground drilling |
| CN107289830A (en) * | 2017-08-21 | 2017-10-24 | 雅化集团绵阳实业有限公司 | A kind of cap explosive connector |
| CN108895934A (en) * | 2018-07-27 | 2018-11-27 | 中国矿业大学 | A kind of deep hole standing shot blasting charge method and device |
| CN211953894U (en) * | 2020-03-07 | 2020-11-17 | 福州闽龙铁路工程有限公司 | Charging structure for blind gun for subway shield rock blasting treatment |
-
2020
- 2020-03-07 CN CN202010154167.9A patent/CN111141187A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247387A (en) * | 1925-02-14 | 1926-02-18 | Henry Houghton | Shot stemming means or appliances for use in mines, quarries, and the like |
| GB351998A (en) * | 1930-04-02 | 1931-07-02 | Hermann Kruskopf | Improved process of and device for maintaining blasting explosive charges in bore-holes |
| JPH0861900A (en) * | 1994-08-15 | 1996-03-08 | Nippon Koki Co Ltd | Residual explosive powder searching method |
| CN101713624A (en) * | 2009-11-17 | 2010-05-26 | 广东爆破工程有限公司 | Explosion and crushing method for underground concealed rock ground drilling |
| CN107289830A (en) * | 2017-08-21 | 2017-10-24 | 雅化集团绵阳实业有限公司 | A kind of cap explosive connector |
| CN108895934A (en) * | 2018-07-27 | 2018-11-27 | 中国矿业大学 | A kind of deep hole standing shot blasting charge method and device |
| CN211953894U (en) * | 2020-03-07 | 2020-11-17 | 福州闽龙铁路工程有限公司 | Charging structure for blind gun for subway shield rock blasting treatment |
Non-Patent Citations (1)
| Title |
|---|
| 胡锦华: "深孔预裂爆破在盾构机穿越硬岩地层的应用及安全防护措施", 施工技术, vol. 47, 30 June 2018 (2018-06-30), pages 912 - 914 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696999A (en) * | 2020-12-30 | 2021-04-23 | 山东科技大学 | Charging device and charging method for deep hole blasting |
| CN112696999B (en) * | 2020-12-30 | 2022-11-25 | 山东科技大学 | Charging device and charging method for deep hole blasting |
| WO2023197391A1 (en) * | 2022-04-14 | 2023-10-19 | 中钢集团马鞍山矿山研究总院股份有限公司 | Cartridge loading method for horizontal hole in broken rock of underground mine |
| CN115406320A (en) * | 2022-08-30 | 2022-11-29 | 四川中鼎爆破工程有限公司 | Safety device for removing blast hole filler |
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