CN109307459B - Rapid dust fall method for blast shock wave water bubbles - Google Patents
Rapid dust fall method for blast shock wave water bubbles Download PDFInfo
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- CN109307459B CN109307459B CN201811487988.3A CN201811487988A CN109307459B CN 109307459 B CN109307459 B CN 109307459B CN 201811487988 A CN201811487988 A CN 201811487988A CN 109307459 B CN109307459 B CN 109307459B
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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
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Separation Of Particles Using Liquids (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a rapid dust settling method for blast shock wave water bubbles, which comprises the following steps: 1) filling water into the water bag, wherein the ratio of the volume of the water to the volume of the water bag is as follows: 0.6 to 0.7; 2) filling a foaming agent into a water bag, wherein each liter of water contains 0.2-0.5 g of the foaming agent; 3) filling carbon dioxide gas or carbonic acid into the water bag at 25 ℃, and sealing the water bag, wherein the air pressure in the sealed water bag is 0.5-0.6 MP; 4) filling water bags at two ends of the explosive column in the blast hole, and plugging the blast hole with clay; 5) detonating the explosive by a detonator, rapidly decomposing carbonic acid in the water bag by using heat and vibration generated by explosion to generate a large amount of carbon dioxide gas, and generating a large amount of bubbles in the water bag by using the carbon dioxide gas; the water bag is burst by high-temperature and high-pressure gas generated by explosion, and the dust is reduced by utilizing bubbles and water mist diffused to the periphery when the water bag bursts. The invention utilizes a large amount of fine bubbles and water mist which are generated during explosion and uniformly spread around to remove dust, and has good dust-settling effect.
Description
Technical Field
The invention relates to the technical field of blasting, in particular to a blasting device capable of rapidly reducing dust.
Background
In engineering practice, a large amount of dust and harmful gas are generated in the blasting and tunneling of the tunnel, the health of tunnel constructors is seriously harmed, and meanwhile, the environment is polluted. After tunnel blasting and tunneling, a method of injecting fresh air into a tunnel by using a pressure type air feeder is generally adopted to achieve the purpose of discharging dust and harmful gas in the tunnel, but the method not only consumes time and energy, but also has an unobvious effect, and particularly for long and large tunnels, constructors are still harmed by the dust and the harmful gas.
At present, in the domestic tunnel blasting, a water seal blasting technology is generally adopted, and the dust concentration and the emission of harmful gas are controlled from the source. The definition of water seal blasting by relevant scholars in China is as follows: the plastic water bags filled with clear water are placed at the front and the back of the explosive, the orifice water bags replace solid stemming for use, and after the explosive explodes, water in the water bags becomes vapor and tiny water drops to be suspended in the air under the action of high temperature and high pressure, so that the dust can be captured and harmful gas can be adsorbed, and the dust concentration and the harmful gas can be reduced.
The field practice proves that the water seal blasting technology plays a certain role in dust fall and harmful gas adsorption in the tunneling blasting process, but the actual dust fall effect is limited because water in the water bag does not uniformly form fine water drops during actual blasting and the uniformity of the water in the water bag diffusing all around is not enough.
Disclosure of Invention
In view of the above, the present invention provides a method for rapidly removing dust from blast shock bubbles, so as to improve the dust removal effect of water seal blasting.
The invention discloses a rapid dust settling method for blasting shock wave water bubbles, which comprises the following steps:
1) filling water into the water bag, wherein the ratio of the volume of the water to the volume of the water bag is as follows: 0.6 to 0.7;
2) filling a foaming agent into a water bag, wherein each liter of water contains 0.2-0.5 g of the foaming agent;
3) filling carbon dioxide gas or carbonic acid into the water bag at 25 ℃, and sealing the water bag, wherein the air pressure in the sealed water bag is 0.5-0.6 MP;
4) the water bag is arranged at the end part of the explosive column in the blast hole, and the blast hole is plugged by stemming;
5) detonating the explosive by a detonator, rapidly decomposing carbonic acid in the water bag by using heat and vibration generated by explosion to generate a large amount of carbon dioxide gas, and generating a large amount of bubbles in the water bag by using the carbon dioxide gas; the water bag is burst by high-temperature and high-pressure gas generated by explosion, and the dust is reduced by utilizing bubbles and water mist diffused to the periphery when the water bag bursts.
Further, the middle part of the water bag is provided with a hole extending along the axial direction.
The invention has the beneficial effects that:
the invention relates to a method for rapidly reducing dust of blast shock wave water bubbles, which is characterized in that a water bag dissolved with carbon dioxide and a foaming agent is arranged at the end part of a blast hole, when an explosive explodes, high temperature and vibration generated by explosion can quickly decompose carbonic acid in the water bag to generate a large amount of carbon dioxide gas, and the large amount of carbon dioxide gas forms a large amount of bubbles in the water bag, so that when the water bag explodes, water in the water bag diffuses to the periphery in the form of a large amount of bubbles and water mist, which is obviously different from the method that water diffuses to the periphery in the form of small water drops when the. And the high air pressure in the water bag can also increase the uniformity and distance of the air bubbles and water in the water bag diffusing to the periphery during explosion.
When the water bag bursts under the action of high-temperature and high-pressure gas generated by explosion, the high-pressure gas generated by explosion can further thin the bubbles, so that a larger amount of fine bubbles and water mist are formed and spread around; and during explosion, high-temperature and high-pressure gas can rapidly enter the axial hole formed in the middle of the water bag, so that the water bag is exploded towards the periphery, and the uniformity of water and bubbles in the water bag diffusing towards the periphery during explosion can be further improved.
The surface area of the air bubbles is large, the number of the air bubbles is large, and the staying time of the air bubbles is longer than that of water drops generated when a common water bag explodes, so that the dust capturing capacity of the air bubbles in the flying process is stronger, and more dust can be captured. And can produce a large amount of water smoke during the explosion, also can produce a large amount of water smoke when the bubble breaks, the volume of water smoke is littleer to the volume of the tiny water droplet that current water bag produced when the explosion, and the water smoke is to the homogeneity greatly increased also all around, and the time of staying in the air also can be longer than tiny water droplet, and consequently the ability that water smoke caught the dust is also stronger for tiny water droplet for dust fall effect also can further improve.
Drawings
FIG. 1 is a schematic view of the filling structure of the water bag and explosive.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in the figure, the method for rapidly reducing dust of blast shock wave bubbles in the embodiment comprises the following steps:
1) filling water into the water bag, wherein the ratio of the volume of the water to the volume of the water bag is as follows: 0.6 to 0.7;
2) filling a foaming agent into a water bag, wherein each liter of water contains 0.2-0.5 g of the foaming agent; the foaming agent serves to generate bubbles and to stabilize the generated bubbles. The foaming agent is more in the prior art, and the foaming agent adopted in the embodiment is Dowfoth 250, which can generate a large amount of micro bubbles.
3) Filling carbon dioxide gas or carbonic acid into the water bag at 25 ℃, and sealing the water bag, wherein the air pressure in the sealed water bag is 0.5-0.6 MP;
4) the water bag 1 is arranged at the end part of the explosive column 3 in the blast hole, and a small amount of stemming 4 is used for plugging the blast hole;
5) detonating the explosive by using the detonator 2, rapidly decomposing carbonic acid in the water bag by using heat and vibration generated by explosion to generate a large amount of carbon dioxide gas, and generating a large amount of bubbles in the water bag by using the carbon dioxide gas; the water bag is burst by high-temperature and high-pressure gas generated by explosion, and the dust is reduced by utilizing bubbles and water mist diffused to the periphery when the water bag bursts.
In this embodiment, the water bag is provided with an axially extending hole 5 in the middle.
In the method for rapidly reducing dust by blasting shock wave water bubbles, water bags in which carbon dioxide and foaming agents are dissolved are arranged at two ends of a blast hole, when an explosive explodes, carbonic acid in the water bags can be rapidly decomposed to generate a large amount of carbon dioxide gas by high temperature and vibration generated by explosion, and the large amount of carbon dioxide gas forms a large amount of bubbles in the water bags; the high air pressure of the water bag can also enable the air bubbles and the water in the water bag to be more uniformly diffused to the periphery during explosion, and increase the distance between the air bubbles and the water diffused to the periphery. When the water bag bursts under the action of high-temperature and high-pressure gas generated by explosion, the high-pressure gas generated by explosion can further thin the bubbles so as to form a larger amount of fine bubbles and water mist to be diffused to the periphery; and during explosion, high-temperature and high-pressure gas can rapidly enter the axial hole formed in the middle of the water bag, so that the water bag is exploded towards the periphery, and the uniformity of water and bubbles in the water bag diffusing towards the periphery during explosion can be further improved.
The method for rapidly reducing dust of blast shock wave water bubbles in the embodiment is different from the traditional water seal blasting method in that a shock wave blasting water bag can be placed at one end, the surface area of a large number of tiny bubbles generated by the blasting is large, and the staying time of the bubbles in the air is longer than that of water drops generated by the common water bag when the water bag explodes, so that the dust capturing capacity of the bubbles in the flying process is stronger, more dust can be captured, and the effect is better than that of the common water seal blasting. And can produce a large amount of water smoke during the explosion, also can produce a large amount of water smoke when the bubble breaks, the volume of water smoke reduces greatly to the volume of the tiny water droplet that current water bag produced when exploding, and water smoke is to the homogeneity greatly increased that spreads all around also, and the time of staying in the air is also longer, and consequently the ability that the dust was caught to the water smoke is stronger than tiny water droplet for dust fall effect also can further improve.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (2)
1. A rapid dust fall method for blast shock wave water bubbles is characterized in that: the method comprises the following steps:
1) filling water into the water bag, wherein the ratio of the volume of the water to the volume of the water bag is as follows: 0.6 to 0.7;
2) filling a foaming agent into a water bag, wherein each liter of water contains 0.2-0.5 g of the foaming agent;
3) filling carbon dioxide gas or carbonic acid into the water bag at 25 ℃, and sealing the water bag, wherein the air pressure in the sealed water bag is 0.5-0.6 MP;
4) the water bag is arranged at the end part of the explosive column in the blast hole, and the blast hole is plugged by stemming;
5) detonating the explosive by a detonator, rapidly decomposing carbonic acid in the water bag by using heat and vibration generated by explosion to generate a large amount of carbon dioxide gas, and generating a large amount of bubbles in the water bag by using the carbon dioxide gas; the water bag is burst by high-temperature and high-pressure gas generated by explosion, and the dust is reduced by utilizing bubbles and water mist diffused to the periphery when the water bag bursts.
2. The rapid dust fall method for the blast shock wave water bubbles according to claim 1, characterized in that: the middle part of the water bag is provided with a hole extending along the axial direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487988.3A CN109307459B (en) | 2018-12-06 | 2018-12-06 | Rapid dust fall method for blast shock wave water bubbles |
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|---|---|---|---|
| CN201811487988.3A CN109307459B (en) | 2018-12-06 | 2018-12-06 | Rapid dust fall method for blast shock wave water bubbles |
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| CN109307459A CN109307459A (en) | 2019-02-05 |
| CN109307459B true CN109307459B (en) | 2020-08-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220387948A1 (en) * | 2019-11-05 | 2022-12-08 | Daicel Corporation | Ultra fine bubble production apparatus |
| CN111023931B (en) * | 2020-01-03 | 2022-06-28 | 湘潭大学 | Layout structure and method for reducing concentration of mine blasting dust and harmful gas |
| CN112495091A (en) * | 2020-11-12 | 2021-03-16 | 华能澜沧江水电股份有限公司托巴水电工程建设管理局 | Method for reducing dust generated by blasting by water pressing bag |
| CN114810189A (en) * | 2022-04-19 | 2022-07-29 | 武汉理工大学 | Rapid dust removal device and method suitable for tunnel blasting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1237193A (en) * | 1968-01-31 | 1971-06-30 | Dynamit Nobel Ag | Method of effecting underground blasting operations |
| US6553887B1 (en) * | 1999-02-19 | 2003-04-29 | Her Majesty The Queen In Right Of Canada As Represented By The Solicitor General Acting Through The Commissioner Of The Royal Canadian Mounted Police | Foam formulations |
| CN103075938A (en) * | 2013-01-15 | 2013-05-01 | 攀枝花恒威化工有限责任公司 | Water stemming containing foaming agent |
| CN105066804A (en) * | 2015-07-16 | 2015-11-18 | 湖南辰州矿业有限责任公司 | Mine water stemming bag and application of mine water stemming bag in borehole blockage |
-
2018
- 2018-12-06 CN CN201811487988.3A patent/CN109307459B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1237193A (en) * | 1968-01-31 | 1971-06-30 | Dynamit Nobel Ag | Method of effecting underground blasting operations |
| US6553887B1 (en) * | 1999-02-19 | 2003-04-29 | Her Majesty The Queen In Right Of Canada As Represented By The Solicitor General Acting Through The Commissioner Of The Royal Canadian Mounted Police | Foam formulations |
| CN103075938A (en) * | 2013-01-15 | 2013-05-01 | 攀枝花恒威化工有限责任公司 | Water stemming containing foaming agent |
| CN105066804A (en) * | 2015-07-16 | 2015-11-18 | 湖南辰州矿业有限责任公司 | Mine water stemming bag and application of mine water stemming bag in borehole blockage |
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| CN109307459A (en) | 2019-02-05 |
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