CN206801542U - A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing - Google Patents
A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing Download PDFInfo
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- CN206801542U CN206801542U CN201720501450.8U CN201720501450U CN206801542U CN 206801542 U CN206801542 U CN 206801542U CN 201720501450 U CN201720501450 U CN 201720501450U CN 206801542 U CN206801542 U CN 206801542U
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Abstract
The utility model discloses a kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing, can effectively solve the problems, such as to improve gas drainage under suction efficiency, technical scheme is, separated two-by-two between explosion unit by stemming, each explosion unit is included by outer tube made of PVC material and inner tube, outer tube and inner tube are one end open, the hollow tubular structure of one end sealing, inner tube set is in outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end end wall surround the outer filled cavity for filling dry ice jointly, the inner chamber of inner tube forms the interior filled cavity for filling explosive, dry ice is filled with outer filled cavity, explosive is filled with interior filled cavity, millisecond delay electric detonator is provided with explosive, the utility model can be effectively accomplished the generation number of control critical eigenvalue, as crack extends, CO caused by dry ice sublimation2Can more effectively displacement coal mine gas, improve gas drainage under suction efficiency；Meanwhile dry ice sublimation process, a large amount of blast heats are absorbed, reduce quick-fried temperature.
Description
Technical field
A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing is the utility model is related to, it is pre- for coal-bed gas
Extraction, prevent and treat coal and gas prominent.
Background technology
The major impetus energy of Chinese national economy construction is coal, and it accounts for more than the 70% of China's energy entire infrastructure.Mesh
Before, China records colliery on the regular payroll and shares 2.6 ten thousand, and all collieries are all gaseous mines, and wherein more than half belongs to high methane
Mine.The exploitation in colliery can all be limited by certain condition, including natural geological conditions, underground mining condition, miner's technical ability
Condition and equipment etc., therefore the problems such as security reliability is poor, security incident incidence is high be present in coal mining, wherein the most serious
Be gas accident.The frequent development for hindering coal undertaking of gas accident, economy and the heart to injures and deaths miner family
Reason brings very big injury, while have impact on the harmonious development of mining area and social environment.In addition, the production shape of coal in China
Very big gap compared with other countries of the world also be present in condition.Therefore, the scientific research of control of coalmine gas is greatly developed, is ensured
Fiery colliery safety in production has very important significance.
The general name of pernicious gas is exactly coal mine gas during mine coal seam is formed, and coal mine gas is with methane（CH4）Based on.Gas
Caused by the generation majority of explosion accident is all due to gas concentration monitoring inaccuracy, such as " 11.13 gas in the colliery of Anhui Pan three
Explosion accident ", " 11.1 gas explosion accident " in Heilungkiang Baoxing colliery, " 5.28 gas explosion accident " in Liaoning dragon and phoenix colliery
Deng.Gas accident is one of chief threat of Safety of Coal Mine Production, and gas can explode and cause ore deposit to ruin people to die, and gas density is too high
Personnel's anoxia asphyxia can be caused, in addition it is dead.The explosion limit of gas is 5% ~ 16%, under certain condition when gas density reaches
With the oxygen in air violent chemical reaction will occur for explosion limit value so as to cause gas explosion.
Coal and gas prominent is one of disaster of most serious in coal production, and it is many to prevent and treat the technology of coal and gas prominent,
Wherein the pre- extraction of coal-bed gas has turned into an important technique measure of preventing and treating coal and gas prominent.But in China's gaseous mine
It is low hard hard-pumped coal seam of breathing freely to have considerable coal seam, and gas drainage efficiency is very low.
Three kinds of methods of the pre- extraction generally use of coal-bed gas in China：(1) hydrofracturing method；(2) general blasting procedure；(3) dry ice
Plavini.Hydrofracturing method is only capable of producing two hole-edge cracks, and direction of check is controlled by crustal stress place, perpendicular to minimum
Principal direction of stress.Therefore direction of check is often parallel to the primary plane of disruption in coal seam, and this external crack is readily along primary in coal seam
Weak face extends, and is not likely to produce the fresh crackle perpendicular to the primary plane of disruption.Although general blasting procedure can produce many random
The hole-edge crack of distribution, but it is all shorter, and cause the wall of a borehole seriously to crush, or produce residual compressive stress area-" stress cage ".
Can not be with the UNICOM that drills due to blocking or being compacted established crackle by coal dust around drilling, therefore the permeability near drilling is non-
But can not increase reduces on the contrary.And general explosion produces HTHP with potential dangerous drawback.Dry-ice expanding method is profit
With powdery CaCl2Meet water heating, there is provided thermal source makes dry ice be used as the expansion energy, but this method operation fiber crops by heat sublimation generation gas
It is tired, crack poor controllability is produced, it is less that crack produces number.Therefore, it improves and innovated and be imperative.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of for millisecond multistage directional blasting dry ice fracturing
Blasting cartridge, can effectively solve the problems, such as to improve gas drainage under suction efficiency.
To achieve these goals, technical scheme is used by the utility model：
A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing, including multiple explosion units, two-by-two explosion list
Separated between member by stemming, each explosion unit is included by outer tube made of PVC material and inner tube, and outer tube and inner tube are one
End opening, the hollow tubular structure of one end sealing, inner tube set is in outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end
End wall surrounds the outer filled cavity for filling dry ice jointly, and the inner chamber of inner tube forms the interior filled cavity for filling explosive, filled out outside
Fill intracavitary and be filled with dry ice, be filled with explosive in interior filled cavity, millisecond delay electric detonator is provided with explosive.
Symmetrical outer tube groove is provided with the side wall of described outer tube both sides, being provided with inner tube in the side wall of inner tube both sides leads to
Groove.
Described blasting cartridge is placed in blasthole, and the medial end of blasting cartridge is connected with the bottom hole of blasthole, the external port of blasthole
Portion is sealed by blocking stemming.
A kind of millisecond multistage directional blasting dry ice fracturing method, comprises the following steps,
First, Drilling blasthole and extraction hole on working face of coal seam；
2nd, blasting cartridge is made
Described blasting cartridge includes multiple explosion units, is separated between two explosion units by stemming, each explosion unit bag
Including by outer tube made of PVC material and inner tube, outer tube and inner tube are one end open, the hollow tubular structure of one end sealing,
In outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end end wall surround jointly to be filled out inner tube set for filling the outer of dry ice
Chamber is filled, the inner chamber of inner tube forms the interior filled cavity for filling explosive, and dry ice is filled with outer filled cavity, is filled in interior filled cavity
There is explosive, millisecond delay electric detonator is provided with explosive；
3rd, blasting cartridge is loaded in blasthole, the medial end of blasting cartridge is connected with the bottom hole of blasthole, will using closure stemming
The outer end oral area sealing of blasthole；Blasthole is drawn in the payment to a porter of the millisecond delay electric detonator of each explosion unit；
4th, each explosion list is ignited every 40 milliseconds by millisecond delay electric detonator step by step by the order of blasthole from inside to outside
Member, the energy for release of exploding make the dry ice transient evaporation being filled in outer filled cavity, the CO after gasification2Injection is to Detonation Shock Wave
In the Oriented Fracture of formation, extend crack distance, the complicated seam net of large volume is formed in coal seam, is finally reached the purpose for increasing and splitting.
Described blasthole and the spacing in extraction hole are 2000mm.
Outer tube groove is provided with the side wall of the outer tube both sides of explosion unit in the step 2, in the side wall of inner tube both sides
It is provided with inner tube groove.
Explosion unit in the step 2 at least 3.
The length of closure stemming in the step 3 is 1200mm.
The utility model method is simple, explosion tubular construction novel and unique, easily implements, can be effectively accomplished the life of control critical eigenvalue
Into number, increase the distance of fracture extension and hole wall will not be made seriously to crush, extend action time make blast generation gas with
And dry ice sublimation gas is easier injection into crack, driving crackle expands the scope of fracturing to farther extension, with splitting
Seam extension, CO caused by dry ice sublimation2Can more effectively displacement coal mine gas, improve gas drainage under suction efficiency；Meanwhile dry ice sublimation
Process, a large amount of blast heats are absorbed, reduce quick-fried temperature so that blasting process is more safe and reliable, and using effect is good, has good
Social and economic benefit.
Brief description of the drawings
Fig. 1 is the sectional front view of the utility model blasting cartridge.
Fig. 2 is the cross sectional plan view of the utility model blasting cartridge.
Fig. 3 is the cross sectional plan view of the utility model blasting cartridge（Dry ice, explosive and detonator are not installed）.
Fig. 4 is that schematic diagram is arranged in the utility model blasthole and extraction hole.
Fig. 5 is scheme of installation of the utility model blasting cartridge in blasthole.
Embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with drawings and examples.
As shown in figure 1, a kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing, including multiple explosion units,
Separated two-by-two between explosion unit by stemming 7, each explosion unit is included by outer tube made of PVC material 1 and inner tube 2, outside
Pipe 1 and inner tube 2 are one end open, the hollow tubular structure of one end sealing, and inner tube set is in outer tube, outer wall of inner tube, outer tube
Inwall and outer tube sealed end end wall surround the outer filled cavity 1a for filling dry ice jointly, and the inner chamber of inner tube forms fried for filling
Dry ice 5 is filled with the interior filled cavity 2a of medicine, outer filled cavity 1a, explosive 6 is filled with interior filled cavity 2a, is provided with explosive 6
Millisecond delay electric detonator 4.
To ensure using effect, as shown in Figure 2,3, symmetrical outer tube groove is provided with the side wall of the described both sides of outer tube 1
3, inner tube groove 11 is provided with the side wall of inner tube both sides, and the outer tube V being connected with outer tube groove is provided with outer tube sealed end end wall
V notch v 3a, the inner tube V-notch 11a being connected with inner tube groove is provided with inner tube sealed end end wall, it is quick-fried due to slotting in advance
The energy discharged after fried can rapid damage outer tube, make to crack in coal seam and continue to extend.
The external diameter of described outer tube 1 is 40mm, and wall thickness 1.8mm, the external diameter of inner tube is 16mm, wall thickness 1.8mm；
The length of described stemming 7 is 80cm-120cm；
Described explosion unit at least 3；
Described blasting cartridge is placed in blasthole 9, and the medial end of blasting cartridge is connected with the bottom hole of blasthole, the external port of blasthole
Portion is sealed by blocking stemming 12；The length of described closure stemming 12 is 1200mm.
The utility model method has obtained good technique effect, to pacify mining industry in Shanxi the Lushui River through actual use（Group）
Exemplified by this method is implemented in the peaceful colliery of Co., Ltd's the Lushui River, testing site away from the m of roadway floor 1.8 at, it is parallel with coal seam tendency
A diameter of 65 mm is beaten downwards at place, depth 20m blasthole 9, loads blasting cartridge in blasthole 9 first, is sequentially delayed by millisecond electric
Detonator ignites each explosion unit every 40 milliseconds step by step, and the energy for release of exploding makes the dry ice 5 being filled in outer filled cavity 1a
Transient evaporation, the CO after gasification2In the Oriented Fracture that injection is formed to Detonation Shock Wave, extend crack distance, the shape in coal seam
Into the complicated seam net of large volume, the purpose for increasing and splitting is finally reached.
Embodiment 1
The spacing L in the first, Drilling blasthole 9 and extraction hole 10 on working face of coal seam, blasthole 9 and extraction hole 10 is 2000mm；
2nd, blasting cartridge is made；
Described blasting cartridge includes multiple explosion units, is separated two-by-two between explosion unit by stemming 7, each explosion unit
Including by outer tube made of PVC material 1 and inner tube 2, outer tube 1 and inner tube 2 are one end open, the hollow tubular of one end sealing
Structure, in outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end end wall surround for filling dry ice inner tube set jointly
Outer filled cavity 1a, the inner chamber of inner tube forms the interior filled cavity 2a for filling explosive, dry ice 5 is filled with outer filled cavity 1a, interior
Explosive 6 is filled with filled cavity 2a, millisecond delay electric detonator 4 is provided with explosive 6, each explosion unit institute blasting charge 6 is
150g；
3rd, blasting cartridge is put into blasthole and ignited
Blasting cartridge is loaded in blasthole, the medial end of blasting cartridge is connected with the bottom hole of blasthole, will using closure stemming 12
The outer end oral area sealing of blasthole, the length of closure stemming 12 is 1200mm；The pin of the millisecond delay electric detonator of each explosion unit
Line 8 draws blasthole, is ignited step by step every 40 milliseconds by millisecond delay electric detonator by the order of blasthole from inside to outside each quick-fried
Broken unit, the energy for release of exploding make the transient evaporation of dry ice 5 being filled in outer filled cavity 1a, the CO after gasification2Injection is to quick-fried
Hong surge waveform into Oriented Fracture in, extend crack distance, the complicated seam net of large volume formed in coal seam, increasing is finally reached and splits
Purpose, then carry out gas drainage under suction to extraction hole, the embodiment be maintained at 6 by the mash gas extraction extraction scale of 55 days ~
8m3/ day.
Embodiment 2
The spacing L in the first, Drilling blasthole 9 and extraction hole 10 on working face of coal seam, blasthole 9 and extraction hole 10 is 2000mm；
2nd, blasting cartridge is made；
Described blasting cartridge includes multiple explosion units, is separated two-by-two between explosion unit by stemming 7, each explosion unit
Including by outer tube made of PVC material 1 and inner tube 2, outer tube 1 and inner tube 2 are one end open, the hollow tubular of one end sealing
Structure, in outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end end wall surround for filling dry ice inner tube set jointly
Outer filled cavity 1a, the inner chamber of inner tube forms the interior filled cavity 2a for filling explosive, dry ice 5 is filled with outer filled cavity 1a, interior
Explosive 6 is filled with filled cavity 2a, is provided with millisecond delay electric detonator 4 in explosive 6, explosive 6 contained by each unit is 300g；
3rd, blasting cartridge is put into blasthole and ignited
Blasting cartridge is loaded in blasthole, the medial end of blasting cartridge is connected with the bottom hole of blasthole, will using closure stemming 12
The outer end oral area sealing of blasthole, the length of closure stemming 12 is 1200mm；The pin of the millisecond delay electric detonator of each explosion unit
Line 8 draws blasthole, is ignited step by step every 40 milliseconds by millisecond delay electric detonator by the order of blasthole from inside to outside each quick-fried
Broken unit, the energy for release of exploding make the transient evaporation of dry ice 5 being filled in outer filled cavity 1a, the CO after gasification2Injection is to quick-fried
Hong surge waveform into Oriented Fracture in, extend crack distance, the complicated seam net of large volume formed in coal seam, is finally reached increasing
The purpose split, then carries out gas drainage under suction to extraction hole, and the embodiment is maintained at by the mash gas extraction extraction scale of 90 days
11~12m3/ day；Embodiment 3
First, the Drilling blasthole 9 on working face of coal seam, and extraction hole 10, distance L of the extraction hole 10 away from blasthole 9 are 2000mm；
2nd, blasting cartridge is made
Described blasting cartridge includes multiple explosion units, is separated between two explosion units by stemming 7, each explosion unit bag
Include by outer tube made of PVC material 1 and inner tube 2, outer tube 1 and inner tube 2 are one end open, the hollow tubular knot of one end sealing
Structure, in outer tube, outer wall of inner tube, outer tube wall and outer tube sealed end end wall surround for filling the outer of dry ice inner tube set jointly
Filled cavity 1a, the inner chamber of inner tube form the interior filled cavity 2a for filling explosive, are filled with dry ice 5 in outer filled cavity 1a, inside fill out
Fill in chamber 2a and be filled with explosive 6, be provided with millisecond delay electric detonator 4 in explosive 6, explosive 6 contained by each unit is 450g；
3rd, blasting cartridge is put into blasthole and ignited
Blasting cartridge is loaded in blasthole, the medial end of blasting cartridge is connected with the bottom hole of blasthole, will using closure stemming 12
The outer end oral area sealing of blasthole, the length of closure stemming 12 is 1200mm；The pin of the millisecond delay electric detonator of each explosion unit
Line 8 draws blasthole, is ignited step by step every 40 milliseconds by millisecond delay electric detonator by the order of blasthole from inside to outside each quick-fried
Broken unit, the energy for release of exploding make the transient evaporation of dry ice 5 being filled in outer filled cavity 1a, the CO after gasification2Injection is to quick-fried
Hong surge waveform into Oriented Fracture in, extend crack distance, the complicated seam net of large volume formed in coal seam, is finally reached increasing
The purpose split, then carries out gas drainage under suction to extraction hole, and the embodiment is maintained at by the mash gas extraction extraction scale of 175 days
17~20m3/ day.
By the above situation it should be apparent that after using the utility model method, the energy for release of exploding makes to be filled in
Dry ice transient evaporation in outer filled cavity, the dry ice injection after gasification extend crackle distance, formed substantially in coal seam to crack
The complicated seam net of product, is finally reached the purpose for increasing and splitting, and the engineering is using a kind of millisecond multistage directional blasting dry ice fracturing method and quick-fried
The number of days of broken pipe, gas pumping scale and holding is than general hydrofracturing method, general blasting procedure, dry-ice expanding method scale are big and
The number of days of maintenance is longer.With the increase of explosion unit safety of coal mines permitted explosive dose, the day of gas pumping scale and holding
Number gradually increase；The utility model method is simple, easily implements, and can be effectively accomplished the generation number of control critical eigenvalue, increases crack
The distance of extension and hole wall will not be made seriously to crush, extending action time makes blast generation gas and dry ice sublimation gas more
Easy injection drives the farther propagation of crackle into crack, expands the scope of fracturing, dry ice liter while reaching crack extension
CO2 caused by China can more effective displacement coal mine gas, improve gas drainage under suction efficiency, securely and reliably, using effect is good, has good
Social and economic benefit.
Claims (7)
- A kind of 1. blasting cartridge for millisecond multistage directional blasting dry ice fracturing, it is characterised in that including multiple explosion units, two By stemming between two explosion units（7）Cut-off, each explosion unit are included by outer tube made of PVC material（1）And inner tube （2）, outer tube（1）And inner tube（2）It is one end open, the hollow tubular structure of one end sealing, inner tube set is in outer tube, inner tube Outer wall, outer tube wall and outer tube sealed end end wall surround the outer filled cavity for filling dry ice jointly（1a）, the inner chamber structure of inner tube Into the interior filled cavity for filling explosive（2a）, outer filled cavity（1a）It is interior to be filled with dry ice（5）, interior filled cavity（2a）Inside it is filled with Explosive（6）, explosive（6）Inside it is provided with millisecond delay electric detonator（4）.
- 2. blasting cartridge according to claim 1, it is characterised in that described outer tube（1）It is provided with the side wall of both sides symmetrical Outer tube groove（3）, inner tube groove is provided with the side wall of inner tube both sides（11）.
- 3. blasting cartridge according to claim 1, it is characterised in that described outer tube（1）External diameter be 40mm, wall thickness is 1.8mm, the external diameter of inner tube is 16mm.
- 4. blasting cartridge according to claim 1, it is characterised in that described stemming（7）Length be 80cm-120cm.
- 5. blasting cartridge according to claim 1, it is characterised in that described explosion unit at least 3.
- 6. blasting cartridge according to claim 1, it is characterised in that described blasting cartridge is placed in blasthole（9）It is interior, blasting cartridge Medial end is connected with the bottom hole of blasthole, and the outer end oral area of blasthole is by blocking stemming（12）Sealing.
- 7. blasting cartridge according to claim 6, it is characterised in that described closure stemming（12）Length be 1200mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720501450.8U CN206801542U (en) | 2017-05-08 | 2017-05-08 | A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720501450.8U CN206801542U (en) | 2017-05-08 | 2017-05-08 | A kind of blasting cartridge for millisecond multistage directional blasting dry ice fracturing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930744A (en) * | 2017-05-08 | 2017-07-07 | 河南理工大学 | A kind of millisecond multistage directional blasting dry ice fracturing method and blasting cartridge |
| CN108518225A (en) * | 2018-06-07 | 2018-09-11 | 江苏中控能源科技有限公司 | Dry ice powder dynamic broken rock device, dry ice powder dynamic broken rock system and dry ice powder dynamic rock breaking method |
| CN113431543A (en) * | 2021-04-27 | 2021-09-24 | 河南理工大学 | Multi-pulse CO2Gas treatment method for fractured coal seam |
-
2017
- 2017-05-08 CN CN201720501450.8U patent/CN206801542U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106930744A (en) * | 2017-05-08 | 2017-07-07 | 河南理工大学 | A kind of millisecond multistage directional blasting dry ice fracturing method and blasting cartridge |
| CN108518225A (en) * | 2018-06-07 | 2018-09-11 | 江苏中控能源科技有限公司 | Dry ice powder dynamic broken rock device, dry ice powder dynamic broken rock system and dry ice powder dynamic rock breaking method |
| CN108518225B (en) * | 2018-06-07 | 2024-02-06 | 江苏中控能源科技有限公司 | Dry ice powder dynamic rock breaking device, dry ice powder dynamic rock breaking system and dry ice powder dynamic rock breaking method |
| CN113431543A (en) * | 2021-04-27 | 2021-09-24 | 河南理工大学 | Multi-pulse CO2Gas treatment method for fractured coal seam |
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