CN110645855A - Dust suppression blasting method for medium-length hole of strip mine - Google Patents
Dust suppression blasting method for medium-length hole of strip mine Download PDFInfo
- Publication number
- CN110645855A CN110645855A CN201911009142.3A CN201911009142A CN110645855A CN 110645855 A CN110645855 A CN 110645855A CN 201911009142 A CN201911009142 A CN 201911009142A CN 110645855 A CN110645855 A CN 110645855A
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- blasting
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- blast holes
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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
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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
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
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- 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
Abstract
The invention discloses a dust suppression blasting method for medium-length holes in strip mines, which comprises the following steps: (1) designing a mesh and arranging holes; (2) perforating; (3) checking and measuring a blast hole before charging; (4) filling explosives; (5) arranging a water bag; (6) network connection and detonation. The deep hole dust suppression blasting method in the strip mine reduces the dust concentration after blasting, and is beneficial to environmental protection; the safety is improved, the blasting shock sensation and the flying stones are reduced obviously; the bottom root is zero, the top massive rate is reduced, and the cost for secondary treatment of the bottom root and massive rate is saved; the explosive consumption is saved, and the blasting cost is reduced.
Description
Technical Field
The invention relates to the technical field of blasting engineering, in particular to a dust suppression blasting method for medium-length holes in strip mines.
Background
In order to be integrated into the construction of national green mines and face increasingly severe environment-friendly situations as soon as possible, although the shoveling, transporting and crushing of mines are inhibited, the environment-friendly pressure brought by blasting dust concentration becomes the bottleneck of mine survival and development, and the national environment-friendly supervision has clear requirements: the outdoor blasting construction operation needs dust suppression measures. The existing blasting dust suppression technology only sprays and sprinkles water to a blasting area before and after blasting, has little effect, cannot play a good role in reducing the dust concentration, and increases much cost.
Disclosure of Invention
The invention aims to solve the problems and provides a deep hole dust suppression blasting method in a strip mine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a deep hole dust suppression blasting method in a strip mine comprises the following steps:
(1) mesh design and hole distribution: determining the distance and the row pitch of blasting holes, wherein the hole arrangement mode adopts plum blossom-shaped hole arrangement;
(2) perforating: an Anthras ROC L6 full-hydraulic down-the-hole drill is adopted to drill blast holes with an angle of 75 degrees with an adjacent vacancy surface, the diameter d of the blast holes is set to be 115mm, the depth h1 of the first row of blast holes is set to be 14m, and the depth h2 of each other row of blast holes is set to be 13.5 m;
(3) checking and measuring blast holes before charging: detecting the row spacing of blast holes in a blasting area, and whether the diameter, depth and gradient of the blast holes meet design requirements, observing, shooting and positioning holes and cracks in the blasting blast holes, and determining a corresponding emergency disposal scheme;
(4) filling explosives: the explosive charging mode is that the emulsified explosive with the diameter of 85mm is used for cylindrical continuous explosive charging, and an initiating explosive bag combined by 11 sections of detonators is placed at one third of the height of the explosive column;
(5) arranging a water bag: injecting water into the blast hole after charging, placing a water bag with the length of 1m on the upper part of the explosive after water injection is finished, and then blocking the water bag by using wet rock powder;
(6) network connection and detonation: connecting the rows and the holes in series and in parallel according to design requirements; the initiation mode is millisecond differential initiation, the row-to-row and hole-to-hole differential time delta T =50ms, and the differential time between the first row and the second row is prolonged to 100ms as far as possible, so that the time for pushing the slag forwards and extruding the first row is prolonged.
Further, in the step (5), water is injected into the blast hole, the height of the water bag is 1m, and the height of the wet blocking rock powder is 2.5 m.
Furthermore, the first row of the blasting holes has the ultra-depth of 2m, and the rear row has the ultra-depth of 1.5 m.
Furthermore, in the step (1), the distance between the first row of blasting holes and the adjacent empty surface is 4.5m, the resistance line between the first row of blasting holes and the adjacent empty surface is 3.3m, the distance between the back row of blasting holes is 4.5m, and the row spacing is 3.5 m.
The invention has the beneficial effects that: the deep hole dust suppression blasting method in the strip mine reduces the dust concentration after blasting, and is beneficial to environmental protection; the safety is improved, the blasting shock sensation and the flying stones are reduced obviously; the bottom root is zero, the top massive rate is reduced, and the cost for secondary treatment of the bottom root and massive rate is saved; the explosive consumption is saved, and the blasting cost is reduced.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
A deep hole dust suppression blasting method in a strip mine comprises the following steps:
(1) mesh design and hole distribution: determining the distance and the row pitch of blasting holes, wherein the hole arrangement mode adopts plum blossom-shaped hole arrangement;
(2) perforating: an Anthras ROC L6 full-hydraulic down-the-hole drill is adopted to drill blast holes with an angle of 75 degrees with an adjacent vacancy surface, the diameter d of the blast holes is set to be 115mm, the depth h1 of the first row of blast holes is set to be 14m, and the depth h2 of each other row of blast holes is set to be 13.5 m;
(3) checking and measuring blast holes before charging: detecting the row spacing of blast holes in a blasting area, and whether the diameter, depth and gradient of the blast holes meet design requirements, observing, shooting and positioning holes and cracks in the blasting blast holes, and determining a corresponding emergency disposal scheme;
(4) filling explosives: the explosive charging mode is that the emulsified explosive with the diameter of 85mm is used for cylindrical continuous explosive charging, and an initiating explosive bag combined by 11 sections of detonators is placed at one third of the height of the explosive column;
(5) arranging a water bag: injecting water into the blast hole after charging, placing a water bag with the length of 1m on the upper part of the explosive after water injection is finished, and then blocking the water bag by using wet rock powder;
(6) network connection and detonation: connecting the rows and the holes in series and in parallel according to design requirements; the initiation mode is millisecond differential initiation, the row-to-row and hole-to-hole differential time delta T =50ms, and the differential time between the first row and the second row is prolonged to 100ms as far as possible, so that the time for pushing the slag forwards and extruding the first row is prolonged.
The dust concentration is reduced by 90% after blasting is finished; the safety is improved, the blasting vibration sense is reduced by 50%, and the flying stones are reduced by 60%; the bottom root is zero, the large block rate is reduced to below 5 percent, and the cost for secondary treatment of the bottom root and the large block is saved; saving 5.56-11.18% of explosive and reducing the blasting cost.
Those skilled in the art will appreciate that the above embodiments are merely exemplary embodiments and that various changes, substitutions, and alterations can be made without departing from the spirit and scope of the invention.
Claims (4)
1. A deep hole dust suppression blasting method in a strip mine is characterized by comprising the following steps:
(1) mesh design and hole distribution: determining the distance and the row pitch of blasting holes, wherein the hole arrangement mode adopts plum blossom-shaped hole arrangement;
(2) perforating: an Anthras ROC L6 full-hydraulic down-the-hole drill is adopted to drill blast holes with an angle of 75 degrees with an adjacent vacancy surface, the diameter d of the blast holes is set to be 115mm, the depth h1 of the first row of blast holes is set to be 14m, and the depth h2 of each other row of blast holes is set to be 13.5 m;
(3) checking and measuring blast holes before charging: detecting the row spacing of blast holes in a blasting area, and whether the diameter, depth and gradient of the blast holes meet design requirements, observing, shooting and positioning holes and cracks in the blasting blast holes, and determining a corresponding emergency disposal scheme;
(4) filling explosives: the explosive charging mode is that the emulsified explosive with the diameter of 85mm is used for cylindrical continuous explosive charging, and an initiating explosive bag combined by 11 sections of detonators is placed at one third of the height of the explosive column;
(5) arranging a water bag: injecting water into the blast hole after charging, placing a water bag with the length of 1m on the upper part of the explosive after water injection is finished, and then blocking the water bag by using wet rock powder;
(6) network connection and detonation: connecting the rows and the holes in series and in parallel according to design requirements; the initiation mode is millisecond differential initiation, the row-to-row and hole-to-hole differential time delta T =50ms, and the differential time between the first row and the second row is prolonged to 100ms as far as possible, so that the time for pushing the slag forwards and extruding the first row is prolonged.
2. The deep-hole dust suppression blasting method in the open-pit mine according to claim 1, characterized in that: in the step (5), water is injected into the blast hole, the height of the water bag is 1m, and the height of the wet blocking rock powder is 2.5 m.
3. The deep-hole dust suppression blasting method in the open-pit mine according to claim 1, characterized in that: the first row of blasting blastholes is 2m in ultra-depth, and the back row is 1.5m in ultra-depth.
4. The deep-hole dust suppression blasting method in the open-pit mine according to claim 1, characterized in that: in the step (1), the distance between the blast holes of the first row of blasting is 4.5m, the resistance line with the blank surface is 3.3m, the distance between the blast holes of the rear row is 4.5m, and the row spacing is 3.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911009142.3A CN110645855B (en) | 2019-10-23 | 2019-10-23 | Dust suppression blasting method for medium-length hole of strip mine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911009142.3A CN110645855B (en) | 2019-10-23 | 2019-10-23 | Dust suppression blasting method for medium-length hole of strip mine |
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| CN110645855A true CN110645855A (en) | 2020-01-03 |
| CN110645855B CN110645855B (en) | 2022-06-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097578A (en) * | 2020-08-13 | 2020-12-18 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112746848A (en) * | 2020-12-28 | 2021-05-04 | 邵阳市联合农林建材科技有限公司 | Open-air limestone mining method applied to environmental protection and dust reduction |
| CN114191905A (en) * | 2022-01-07 | 2022-03-18 | 安徽马钢矿业资源集团南山矿业有限公司 | Water-blasting dust-reducing method for open-air iron ore |
| CN114279286A (en) * | 2022-01-07 | 2022-04-05 | 安徽马钢矿业资源集团南山矿业有限公司 | Multistage filling blasting dust-settling method for open-air iron ore |
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| CN106123714A (en) * | 2016-07-25 | 2016-11-16 | 中国水利水电第七工程局有限公司 | A kind of outdoor stock ground depositing dust blasting technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097578A (en) * | 2020-08-13 | 2020-12-18 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112097578B (en) * | 2020-08-13 | 2023-02-21 | 葛洲坝易普力湖南二化民爆有限公司 | Method for controlling root bottom of open-pit limestone mine after blasting |
| CN112746848A (en) * | 2020-12-28 | 2021-05-04 | 邵阳市联合农林建材科技有限公司 | Open-air limestone mining method applied to environmental protection and dust reduction |
| CN114191905A (en) * | 2022-01-07 | 2022-03-18 | 安徽马钢矿业资源集团南山矿业有限公司 | Water-blasting dust-reducing method for open-air iron ore |
| CN114279286A (en) * | 2022-01-07 | 2022-04-05 | 安徽马钢矿业资源集团南山矿业有限公司 | Multistage filling blasting dust-settling method for open-air iron ore |
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| CN110645855B (en) | 2022-06-07 |
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