CN113654411A - Joint-cutting energy release head of carbon dioxide cracking device - Google Patents
Joint-cutting energy release head of carbon dioxide cracking device Download PDFInfo
- Publication number
- CN113654411A CN113654411A CN202110914681.2A CN202110914681A CN113654411A CN 113654411 A CN113654411 A CN 113654411A CN 202110914681 A CN202110914681 A CN 202110914681A CN 113654411 A CN113654411 A CN 113654411A
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- China
- Prior art keywords
- energy release
- carbon dioxide
- energy
- lancing
- pipe body
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- 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.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 40
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 40
- 238000005520 cutting process Methods 0.000 title claims abstract description 38
- 238000005336 cracking Methods 0.000 title abstract description 9
- 239000011435 rock Substances 0.000 claims abstract description 38
- 230000013011 mating Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000005422 blasting Methods 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000007599 discharging Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The embodiment of the invention provides a joint cutting energy release head of a carbon dioxide cracking device, and relates to the technical field of carbon dioxide cracking devices. The method comprises the following steps: the energy release pipe body is of a hollow circular ring-shaped structure, one end of the energy release pipe body is a closed end, the other end of the energy release pipe body is a connecting end, the connecting end is provided with an opening, and two cutting seams are symmetrically arranged on the side wall of the energy release pipe body along the axial direction. The lateral wall through the energy leakage body at the energy leakage head is gone up and is opened the joint-cutting, compare in the current energy leakage mode of opening the energy leakage hole at the energy leakage head tip, be convenient for realize the directional fracture control blasting of rock mass, reduce the surrounding rock unnecessary damage to improve the shaping of rock after the blasting and imitate.
Description
Technical Field
The invention relates to the technical field of carbon dioxide fracturing devices, in particular to a joint cutting energy release head of a carbon dioxide fracturing device.
Background
The carbon dioxide fracturing device blasting mechanism is that a stress wave generated by high-pressure jet flow and a high-energy high-pressure carbon dioxide gas wedge effect jointly act on a rock to generate cracks, namely the theory of the joint action of the stress wave and the high-pressure carbon dioxide gas is utilized. The formation of initial cracks in the rock mass is caused by stress waves generated by the jet flow, and then the high-pressure carbon dioxide gas is wedged into the initially formed cracks in the rock mass and further expands the cracks under the action of quasi-static pressure.
The energy leakage head of the traditional carbon dioxide fracturing device is a hole energy leakage mode, the energy leakage head is short in structure, the energy leakage head is 1/10-1/20 of the total length of the fracturing device, the energy leakage position of the carbon dioxide fracturing device is concentrated in a small area, the energy leakage head is compared with the action range of explosives along a full drill hole, the blasting mode of the carbon dioxide fracturing device can be approximately regarded as a point blasting mode, the stress wave generated by jet flow and the release direction of high-pressure carbon dioxide gas are not controllable, the energy is difficult to effectively act on rock, the blasting quality is influenced, the utilization rate of a blast hole is low, the blasting forming is poor, and the like.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a joint-cutting energy release head of a carbon dioxide cracking device, which is convenient for realizing directional fracture controlled blasting of a rock mass, so as to improve a rock forming effect after blasting.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the utility model provides a carbon dioxide sends joint-cutting energy release head of splitting ware, is including letting out the energy body, it is the annular structure of cavity ring to let out the energy body, let out the one end of energy body and be the blind end, the other end is the link, the link has the opening let out and be equipped with two joint-cutting along axial symmetry on the lateral wall of energy body.
Optionally, the slit is an elongated blind slot.
Optionally, the length of the single cutting seam is 350-600 mm.
Optionally, the length of the energy release pipe body is 500-800 mm, and the axial center of the cutting seam and the axial center of the energy release pipe body are coplanar.
Optionally, the connecting end is a threaded connecting end for connecting with the carbon dioxide fracturer body.
Optionally, the inner diameter of the energy discharge pipe body is consistent with the inner diameter of the throat of a matched carbon dioxide fracturing device.
Optionally, the slit is at least 50mm from the closed end of the outlet body.
Optionally, the width of a single slit is:
wherein C is the width of the cutting seam;
σbrepresenting the tensile strength of the rock; k is a scale factor; p is the load applied to the rock by the high pressure carbon dioxide jet.
According to the joint-cutting energy release head of the carbon dioxide fracturing device provided by the embodiment of the invention, the energy release head of the carbon dioxide fracturing device is improved, the side wall of the energy release pipe body of the energy release head is provided with the cut, the end point-shaped energy release mode of the traditional energy release head is changed, the energy can be directionally released through the cut, the energy release head is arranged in drilling holes such as a rock roadway and a shaft, the directional fracture control blasting of a rock body is facilitated, the unnecessary damage of surrounding rocks is reduced, and the rock forming effect after blasting is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a lancing energy release head of a carbon dioxide cracking device according to an embodiment of the present invention;
fig. 2 is a front view of a lancing energy release head of a carbon dioxide cracker according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be apparent that numerous technical details are set forth in the following specific examples in order to provide a more thorough description of the present invention, and it should be apparent to one skilled in the art that the present invention may be practiced without some of these details. In addition, some methods, means, components and applications thereof known to those skilled in the art are not described in detail in order to highlight the gist of the present invention, but the implementation of the present invention is not affected thereby. The embodiments described herein are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The joint-cutting energy release head of the carbon dioxide fracturing device provided by the embodiment of the invention has a simple structure, can be matched with a main body of the carbon dioxide fracturing device for use, is used for rock blasting in mine engineering, and is particularly suitable for blasting occasions with the requirement of controlling rock blasting forming.
Referring to fig. 1 and 2, the energy leakage joint comprises an energy leakage pipe body 1, the energy leakage pipe body 1 is of a hollow annular structure, one end of the energy leakage pipe body 1 is a closed end 2, the other end of the energy leakage pipe body is a connecting end 3, the connecting end 3 is provided with an opening 31, and two cutting seams 4 are symmetrically arranged on the side wall of the energy leakage pipe body 1 along the axial direction.
The lancing 4 energy release pipe is made of special steel, the tensile strength is not lower than 600MPa, the pipe can be repeatedly used, and the pipe diameter is the same as the diameter of a matched main pipe of the fracturing device.
According to the energy release head of the cutting seam 4 of the carbon dioxide fracturing device, the energy release head of the carbon dioxide fracturing device is improved, the cutting seam 4 is formed in the side wall of the energy release pipe body 1 of the energy release head, the end point-shaped energy release mode of the traditional energy release head is changed, energy can be released directionally through the cutting seam 4, the energy release head is installed in drilling holes such as a rock roadway and a shaft, the directional fracture control blasting of a rock body is facilitated, unnecessary damage to surrounding rocks is reduced, and therefore the rock forming effect after blasting is improved.
In some embodiments, the length of the energy discharge pipe body 1 is 500-800 mm. The length of the single cutting seam 4 is 350-600 mm corresponding to the length of the energy leakage pipe body 1. It can be understood that the length of the slit 4 can be set adaptively according to the length change of the energy discharge pipe body 1, and the two are in positive correlation integrally.
In some embodiments, the length of the kerf 4 can be parameterized according to different models of carbon dioxide crackers; the length parameter of the slit 4 can also be determined according to the test requirements.
In still other embodiments, the axial center of the slit 4 is coplanar with the axial center of the energy discharging pipe body 1, and the plane is a cross section passing through the axial centers of the slit 4 and the energy discharging pipe body 1.
The connecting end 3 of the energy leakage pipe body 1 is a threaded connecting end and is used for being connected with the carbon dioxide fracturing device main body. Optionally, be equipped with thread glue or sealing washer on the threaded connection end surface to after carbon dioxide sends and splits ware main part and closes the connection soon, guarantee the leakproofness of junction.
In other embodiments, the inner diameter of the energy discharge pipe body 1 is consistent with the inner diameter of the throat of the matched carbon dioxide cracking device, so that the outlet pressure of high-pressure carbon dioxide gas of the cracking device is ensured.
As an alternative embodiment, the slit 4 is at least 50mm away from the closed end 2 of the energy discharge tube body 1. Namely, at least 50mm of no cutting seam is reserved between the closed end 2 and the cutting seam 4 of the energy leakage pipe body 1 so as to ensure the strength of the energy leakage pipe body 1.
It can be understood that directional fracture control blasting is a mode of controlling the distribution of a blasting stress field and the quasi-static action of blasting gas on a medium, and achieves the purposes of controlling the crushing degree and the cracking direction of the blasted medium and effectively protecting surrounding rocks, so that the directional fracture control blasting has the advantages of good forming and capability of reducing the damage of the protected rocks. The traditional carbon dioxide fracturing device does not have the capacity of directional fracture control blasting.
The directional fracture blasting of the rock aims to realize regular peripheral molding of blasting excavation and reduce damage of surrounding rock caused by blasting to the maximum extent. The structure of the energy release head of the cutting slit 4 is one of the main factors for realizing the directional fracture blasting of the rock, and the width of the cutting slit 4 is a key parameter of the directional fracture blasting effect under the condition that the length of the energy release pipe body 1 of the energy release head of the cutting slit 4 is fixed.
The width of the cutting seam 4 of the energy discharge pipe of the cutting seam 4 needs to meet two conditions:
firstly, the concentrated force applied in the direction of the cutting seam 4 is enough to break the rock and form an initial guide crack;
secondly, the tangential tensile stress caused by the concentrated force in the direction perpendicular to the slit 4 of the blast hole wall is smaller than the tensile strength of the rock, and radial cracks in the direction not cutting the slit 4 of the blast hole are avoided.
Therefore, the width value C of the slit 4 on the side wall of the energy release pipe body 1 is related to the tensile strength of the rock, and in order to improve the directional fracture blasting effect, the width value C of the slit 4 on the side wall of the energy release pipe body 1 can be calculated according to the following formula:
The scale factor k is mainly influenced by the radius r of the blast hole, the rock property and the stress of the blast hole have little influence on the scale factor k, and the relation between k and r can be fitted according to an exponential function:
k＝6.2r-0.94
in the embodiment of the invention, the width of the cutting seam 4 is calculated by the calculation formula of the width value of the cutting seam 4, the width value of the cutting seam 4 of the energy release pipe can be reasonably determined to a certain extent, and the machining and application type selection of the energy release head of the cutting seam 4 are guided, so that the blasting effect is ensured.
In summary, the embodiment of the invention adopts the lengthened energy release head of the energy release device, and two symmetrical cutting slits are axially formed along the side wall of the energy release pipe body, so that the jet flow formed by the carbon dioxide gas-liquid mixture is released from the direction of the cutting slits, the stress wave generated by the high-pressure jet flow and the high-energy high-pressure carbon dioxide gas wedge effect jointly act on the rock to generate cracks, the rock is cut in the designated direction, the rock is protected in the direction without cutting slits, and the damage to surrounding rocks is reduced; the utilization rate of the blast hole can be improved to a certain extent, the problems of poor blasting forming and the like are solved, and the blasting effect is favorably improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a carbon dioxide sends joint-cutting of splitting ware and lets out ability head, its characterized in that, is including letting out the ability body, it is the ring form structure of cavity to let out the ability body, the one end of letting out the ability body is the blind end, and the other end is the link, the link has the opening let out and be equipped with two joint-cutting along axial symmetry on the lateral wall of ability body.
2. The lancing energy release head of claim 1, wherein the lance is an elongated blind slot.
3. The lancing energy release head according to claim 2, wherein the length of the single lance is 350-600 mm.
4. The lancing energy release head according to claim 3, wherein the length of the energy release pipe body is 500-800 mm, and the axial center of the lancing is coplanar with the axial center of the energy release pipe body.
5. The lancing energy release head of claim 4, wherein the connection end is a threaded connection end for connection with a carbon dioxide fracker body.
6. The lancing energy release head of claim 1, wherein the internal diameter of the energy release pipe body is the same as the internal diameter of the throat of a mating carbon dioxide fracker.
7. The lancing energy release head of claim 1, wherein the lance is at least 50mm from the closed end of the energy release tube body.
8. The lancing energy release head of claim 1, wherein the width of a single lance is:
wherein the content of the first and second substances,c is the width of the cutting seam; σ b represents the tensile strength of the rock; k is a scale factor; p is the load applied to the rock by the high pressure carbon dioxide jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110914681.2A CN113654411A (en) | 2021-08-10 | 2021-08-10 | Joint-cutting energy release head of carbon dioxide cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110914681.2A CN113654411A (en) | 2021-08-10 | 2021-08-10 | Joint-cutting energy release head of carbon dioxide cracking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113654411A true CN113654411A (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110914681.2A Pending CN113654411A (en) | 2021-08-10 | 2021-08-10 | Joint-cutting energy release head of carbon dioxide cracking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323411A (en) * | 2021-12-13 | 2022-04-12 | 北京科技大学 | Internal pressure testing system and method for joint cutting carbon dioxide fracturing device |
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| WO2019174264A1 (en) * | 2018-03-12 | 2019-09-19 | 中国矿业大学 | Method for auxiliary tunneling by means of freezing shaft-sinking carbon dioxide phase change cracking and device therefor |
| CN209687491U (en) * | 2019-03-06 | 2019-11-26 | 山东职业学院 | A kind of easy-to-dismount carbon dioxide fracturing pipe |
| CN112129174A (en) * | 2020-09-03 | 2020-12-25 | 北京科技大学 | Rock mass directional fracturing device and rock mass directional blasting method |
| CN112963146A (en) * | 2021-02-05 | 2021-06-15 | 北京科技大学 | Joint-cutting carbon dioxide fracturing device and rock mass directional blasting method |
-
2021
- 2021-08-10 CN CN202110914681.2A patent/CN113654411A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN102109304A (en) * | 2010-11-30 | 2011-06-29 | 中国矿业大学(北京) | Directional rock blasting crack propagation method and device |
| CN102269544A (en) * | 2011-07-04 | 2011-12-07 | 上海大屯能源股份有限公司 | One-end-closed cumulative blasting slotted pipe device |
| CN105863637A (en) * | 2016-04-08 | 2016-08-17 | 永州市鑫东森机械装备有限公司 | Disposable carbon dioxide cracking device and manufacturing method thereof |
| CN107133459A (en) * | 2017-04-25 | 2017-09-05 | 华东交通大学 | A kind of computational methods of tunnel cumulative photoface exploision periphery hole parameter |
| CN107194038A (en) * | 2017-04-25 | 2017-09-22 | 中铁四局集团有限公司 | Method for determining smooth surface energy-gathered blasting parameters in layered rock mass tunnel |
| WO2019174264A1 (en) * | 2018-03-12 | 2019-09-19 | 中国矿业大学 | Method for auxiliary tunneling by means of freezing shaft-sinking carbon dioxide phase change cracking and device therefor |
| CN209687491U (en) * | 2019-03-06 | 2019-11-26 | 山东职业学院 | A kind of easy-to-dismount carbon dioxide fracturing pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114323411A (en) * | 2021-12-13 | 2022-04-12 | 北京科技大学 | Internal pressure testing system and method for joint cutting carbon dioxide fracturing device |
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Application publication date: 20211116 |
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