CN113310374A - Liquid carbon dioxide fracturing pipe differential delay control blasting method - Google Patents
Liquid carbon dioxide fracturing pipe differential delay control blasting method Download PDFInfo
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- CN113310374A CN113310374A CN202110472187.5A CN202110472187A CN113310374A CN 113310374 A CN113310374 A CN 113310374A CN 202110472187 A CN202110472187 A CN 202110472187A CN 113310374 A CN113310374 A CN 113310374A
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- carbon dioxide
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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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- 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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention belongs to the technical field of mining or quarrying, and provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which comprises the following steps: drilling blast holes with a preset number and a preset depth in a to-be-blasted ground; filling a certain amount of liquid carbon dioxide into the carbon dioxide fracturing pipe; placing the carbon dioxide fracturing pipes in the blast hole one by one; filling a certain amount of explosive into the blast hole blocking cylinder according to the rock physical structure condition of the current to-be-blasted site, and then locking the cover body to the blocking cylinder; step five, arranging a configured blocking barrel in the blast hole; controlling the carbon dioxide cracking tubes and the blocking cylinders in the plurality of blast holes to detonate one by one according to the arrangement sequence; step seven, after the detonation is finished, recovering the blocking cylinder; the blast hole is sealed through the blocking barrel, the blocking barrel can be recycled after blasting, and the blocking barrel is not required to be waited for drying concrete when being used, so that the construction flexibility can be improved, and the working efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of mining or quarrying, and particularly relates to a liquid carbon dioxide fracturing pipe differential delay control blasting method.
Background
The carbon dioxide cracking tube is characterized in that liquid carbon dioxide is heated to generate phase change, expansion pressure of more than 150Mpa is generated in the cracking tube, so that the tube wall is cracked, the released high-pressure gas generates impact action on surrounding rock media, so that rocks are cracked and loosened, and the carbon dioxide discharged by blasting cannot generate sparks and cause coal mine gas and coal dust explosion accidents, so that the carbon dioxide cracking tube has wide application prospect; the existing blasting method of the carbon dioxide fracturing pipe mainly adopts the steps of firstly drilling a blasting hole with a certain depth and diameter, then placing the carbon dioxide fracturing pipe inside the blasting hole, then plugging the top of the blasting hole by using concrete plugging materials, blasting after the plugging materials reach early strength, preparing concrete by adopting the setting mode every time, and blasting after the concrete is solidified, so that the operation is troublesome and the efficiency is low.
Disclosure of Invention
In view of the above problems, the application provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which can seal a blast hole by replacing concrete with a blocking cylinder, recycle the blocking cylinder after blasting, and avoid waiting for drying of the concrete when the blocking cylinder is used, so that the construction flexibility can be improved, and the working efficiency can be improved.
The invention provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which comprises the following steps:
drilling blast holes with preset quantity and preset depth at a to-be-blasted place;
filling a certain amount of liquid carbon dioxide into the carbon dioxide fracturing pipe according to the rock physical structure conditions of the site to be blasted;
placing the prepared carbon dioxide fracturing pipes in the blast hole one by one;
filling a certain amount of explosive into the blast hole blocking barrel according to the rock physical structure conditions of the current to-be-blasted site, penetrating the detonating lead out of the first threading hole, and locking the cover body to the blocking barrel;
placing the cover bodies of the blocking cylinders upwards inside the blast holes one by one, and enabling the bottoms of the blocking cylinders to be in contact with the tops of the carbon dioxide cracking tubes;
controlling the carbon dioxide fracturing pipes in the plurality of blast holes to detonate one by one according to the arrangement sequence, wherein the detonation interval time of the carbon dioxide fracturing pipes in the adjacent blast holes is t1, and the value range of t1 is 25-50 milliseconds; in the same blast hole, firstly, detonating explosive in the plug cylinder to fix the plug and the inner wall of the blast hole, and then detonating the carbon dioxide to crack the pipe after 50-100 milliseconds.
And step seven, after the detonation is finished, recovering the blocking cylinder.
Further, in the fifth step, after the carbon dioxide fracturing pipe is placed in the same blast hole, the detonating cord of the carbon dioxide fracturing pipe penetrates out of the second threading hole in the blocking cylinder from bottom to top, and then the blocking cylinder is placed in the blast hole.
Further, in the fourth step, the charging step for blocking the inside of the cylinder comprises: firstly, determining the quantity of explosive to be filled in the gun barrel according to the rock physical structure condition of the current to-be-blasted area, taking a certain quantity of explosive, opening the cover body, plugging the bottom of the gun barrel by using a charging pipe to fill half of explosive devices, then loading an initiator, extending an initiating line of the initiator out of the plugging barrel, then loading the rest of explosive into the plugging barrel, penetrating the initiating line of the initiator through the first threading hole, and locking the cover body to the plugging barrel.
Furthermore, when the blocking cylinder is arranged, a plurality of carbon dioxide aligning pipes can be used in the same blast hole according to the depth H of the blast hole, and the total length L of the blocking cylinder is more than or equal to 1/2H by using a plurality of blocking cylinders.
Further, stifled section of thick bamboo includes the barrel, the inside coaxial dress cartridge case that is provided with an end open-ended of barrel, the tip of barrel is provided with the jam the open-ended lid, still be provided with on the barrel and communicate the first through wires hole of dress cartridge case, be provided with the fixed subassembly of multiunit along its length direction interval on the lateral wall of barrel, every group fixed subassembly includes the edge two guide cylinders that the radial direction of barrel set up relatively, every the inside all direction of guide cylinder is provided with the piston, the piston deviates from be provided with in the one side of dress cartridge case with the coaxial fixed column of guide cylinder, the tip of fixed column can stretch out the barrel.
Further, in order to ensure the blocking effect of the blocking barrel, the diameter of the barrel body is D1, the diameter of the blast hole is D2, and D1 is D2-0.05X D2, and the distance D3 that the fixed column can extend out of the side wall of the barrel body is more than or equal to (D2-D1) + B, wherein the value range of B is as follows: 20-50 mm.
Further, in order to ensure that the fixing column can be jacked into the side wall of the blast hole after the explosive in the blocking cylinder is detonated, the method for determining the explosive input amount in the blocking cylinder comprises the following steps: firstly, the firmness factor f1 of the rock to be blasted is obtained, which can be known by the type of the rock, and then 2 f 1P 0 (s 1/s 2) is not less than (m 1V 0/V1) C1 is not less than f 1P 0 (s 1/s 2), wherein P0 is atmospheric pressure, m1 is the mass of explosive filled in the cartridge, in kilograms, V0 is the explosive capacity value of the explosive, V1 is the volume of the cartridge, C1 is the pressure factor, which is in the range of 2.6 10 з -5.3 10 з, s1 is the cross-sectional area of the piston, s2 is the cross-sectional area of the fixed pillar, in square meters, and by this arrangement, after the explosive in the cartridge is blasted, the internal pressure rises to push the piston to move rapidly, so that the fixed on the side wall of the cartridge, thereby instantaneously blocking the blast hole.
Furthermore, in order to ensure that the fixing column can be smoothly pushed into the rock, the fixing column is made of high-strength materials,
further, the central axes of the guide cylinders in two adjacent fixing assemblies are vertically arranged.
Furthermore, a through second threading hole is further formed in the barrel body along the axial direction of the barrel body, and the second threading hole is close to the outer side wall of the barrel body.
Further, the barrel is kept away from the open-ended tip still is provided with buffering subassembly, buffering subassembly include one end with the spring that the barrel is connected and with the atress board that the other end of spring is connected, wherein the atress board deviates from the one side of barrel still is provided with spherical recess.
The technical effects are as follows:
the invention provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which can seal a blast hole by replacing concrete with a blocking cylinder, can recycle the blocking cylinder after blasting, does not need to wait for the drying of the concrete when using the blocking cylinder, can improve the flexibility of construction and improve the working efficiency, explodes explosive used by the blocking cylinder in a closed space, is safe to use, controls the carbon dioxide fracturing pipe to be detonated after the interval of 50-100 milliseconds after the blocking cylinder is detonated, can ensure that the fracturing pipe works after the blocking cylinder and the inner wall of the blast hole are fully fixed, can fully exert the blocking effect of the blocking cylinder, ensures the limiting effect on high-pressure carbon dioxide gas, ensures the blasting effect, and on the other hand controls the interval time of the carbon dioxide fracturing pipe in the interval blast hole to be 25-50 milliseconds, stress waves generated after the initiation in the adjacent blast holes can be separated in time and space, and the main vibration section is staggered, so that the blasting earthquake effect and the phenomenon of stone splashing can be greatly reduced, and the blasting safety can be further improved.
In addition, the amount of currently used explosive can be calculated through a formula 2 f 1P 0 (s 1/s 2) not less than (m 1V 0/V1) C1 not less than f 1P 0 (s 1/s 2), so that different types of explosives can be matched with different terrains, explosives with proper quality can be scientifically selected, full ejection of a fixed column of the blocking cylinder can be guaranteed, the explosive can be used as low as possible, construction safety is guaranteed, and the use cost of the explosives is saved.
Furthermore, the buffering assembly is arranged below the blocking barrel, so that impact force on the barrel body of the blocking barrel can be buffered when the carbon dioxide is detonated to cause the cracking tube to crack, the blocking barrel is prevented from loosening, and the working stability of the blocking barrel is further ensured; because its body can receive ascending reaction force when the carbon dioxide sends the burst pipe, set up spherical recess on the atress board to can increase the area of contact at atress board and carbon dioxide send the burst pipe top, avoid haring the body that carbon dioxide sent the burst pipe.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a liquid carbon dioxide fracturing pipe differential delay controlled blasting method provided by the invention.
Fig. 2 is a schematic structural diagram of a barrel in the liquid carbon dioxide fracturing pipe micro-difference delay control blasting method provided by the invention.
Fig. 3 is a schematic sectional structure view of an a-a reservoir of a plugging cylinder in the liquid carbon dioxide fracturing pipe differential delay control blasting method provided by the invention.
Fig. 4 is a schematic cross-sectional structure diagram of a part B-B of a plugging cylinder in the liquid carbon dioxide fracturing pipe differential delay control blasting method provided by the invention.
Fig. 5 is a schematic view of a partially enlarged structure of a barrel C in the liquid carbon dioxide fracturing pipe differential delay control blasting method provided by the invention.
Fig. 6 is a schematic view of a partially enlarged structure of a barrel D in the liquid carbon dioxide fracturing pipe differential delay controlled blasting method provided by the invention.
Fig. 7 is a schematic structural diagram of a liquid carbon dioxide fracturing pipe differential delay controlled blasting method during construction.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which refers to the figures 1 and 7 and comprises the following steps:
firstly, drilling blast holes 31 with preset number and preset depth at a to-be-blasted site; the number and depth of the blast holes are set according to the actual requirements of construction.
Filling a certain amount of liquid carbon dioxide into the carbon dioxide fracturing pipe according to the rock physical structure conditions of the site to be blasted; according to the rock physical construction conditions, the type of the carbon dioxide fracturing pipe 2 to be used and the quality of liquid carbon dioxide filled in the carbon dioxide fracturing pipe are set according to the rock types of the current to-be-blasted place, so that the carbon dioxide fracturing pipe can generate enough energy to blast when being detonated.
Placing the prepared carbon dioxide fracturing pipes in the blast hole one by one; selecting a proper activator according to the quality of the pre-charged carbon dioxide, filling liquid carbon dioxide with preset quality into the carbon dioxide fracturing pipe, placing the carbon dioxide fracturing pipe at the bottom of the blast hole after filling the carbon dioxide, and reserving a detonating cord to the opening of the blast hole 31 to complete the setting of the carbon dioxide fracturing pipe 2.
Filling a certain amount of explosive into the blast hole blocking barrel according to the rock physical structure conditions of the current to-be-blasted area, penetrating the detonating lead out of the first threading hole 103, and locking the cover body 13 to the blocking barrel 1; referring to fig. 2 to 6, the specific mechanism of the blocking cylinder 1 is as follows: the blocking cylinder 1 comprises a cylinder body 10, a loading cylinder 11 with an end opening is coaxially arranged inside the cylinder body 10, the end of the cylinder body 10 is provided with a blocking cover body 13 for blocking the opening, a first threading hole 103 capable of being communicated with the loading cylinder 11 is further arranged on the cylinder body 10, a plurality of groups of fixing assemblies 12 are arranged on the side wall of the cylinder body 10 along the length direction of the side wall of the cylinder body at intervals, each group of fixing assemblies 12 comprises two guide cylinders 120 which are oppositely arranged along the radial direction of the cylinder body 10, each guide cylinder 120 is internally provided with a piston 121 in a guiding manner, one surface of the piston 121 deviating from the loading cylinder 11 is provided with a fixing column 122 which is coaxial with the guide cylinders 120, and the end parts of the fixing column 122 can extend out of the cylinder body 10. Further, the central axes of the guide cylinders in two adjacent fixing assemblies are vertically arranged.
Further, referring to fig. 4, a through second threading hole 102 is further formed in the cylinder 1 along the axial direction of the cylinder, and the second threading hole 102 is disposed near the outer side wall of the cylinder.
Further, referring to fig. 2 and 3, a buffer assembly 14 is further disposed at an end of the cylinder 10 away from the opening, the buffer assembly 14 includes a spring 141 having one end connected to the cylinder 10 and a force-bearing plate 142 connected to the other end of the spring 141, wherein a spherical groove 1420 is further disposed on a surface of the force-bearing plate 141 facing away from the cylinder.
Specifically, the use method of the blocking cylinder 1 comprises the following steps: firstly, filling explosive into a loading barrel 11 of a blocking barrel 1, wherein the loading step inside the blocking barrel comprises the following steps: firstly, determining the quantity of explosive to be filled in the gun barrel according to the rock physical structure condition of the current to-be-blasted area, taking a certain quantity of explosive, opening the cover body 13, filling half of the explosive into the bottom of the explosive cartridge through the explosive charging pipe, then filling the explosive into the detonator, extending the detonating cord of the detonator out of the blocking barrel 1, then filling the rest explosive into the blocking barrel 1, penetrating the detonating cord of the detonator through the first threading hole 103, and locking the cover body 13 onto the blocking barrel 1 to finish the filling of the explosive.
Placing the cover bodies of the blocking cylinders upwards inside the blast holes one by one, and enabling the bottoms of the blocking cylinders to be in contact with the tops of the carbon dioxide cracking tubes; specifically, a detonating cord of the carbon dioxide cracking tube 2 penetrates through the second threading hole 102, then the blocking tube 1 is placed inside the blast hole, the bottom of the blocking tube is in contact with the top of the carbon dioxide cracking tube, and the carbon dioxide cracking tube and the blocking tube 1 are arranged in the blast hole one by one through the method; so that a carbon dioxide tubulation and a plugging cylinder 1 are arranged in each blast hole.
Controlling the carbon dioxide fracturing pipes in the plurality of blast holes to detonate one by one according to the arrangement sequence, wherein the detonation interval time of the carbon dioxide fracturing pipes in the adjacent blast holes is t1, and specifically, connecting the detonating lines of the plugging cylinders in the plurality of blast holes and the detonating lines of the carbon dioxide fracturing pipes with a detonating device; therefore, the blocking cylinder and the carbon dioxide blast pipe are controlled to be detonated one by one through the detonating device, and blasting is finished. T1 is calculated by the method that t1 is (20-40) W/f1, wherein W is a resistance line, the resistance line is the distance between the carbon dioxide fracturing pipe air outlet and the nearest free surface, and f1 is a rock firmness coefficient, so that t1 is calculated, and different delay times are controlled according to different conditions. Wherein t1 has a value ranging from 25 milliseconds to 50 milliseconds; in the same blast hole, firstly, detonating explosive in the plug cylinder to fix the plug and the inner wall of the blast hole, and then detonating the carbon dioxide to crack the pipe after 50-100 milliseconds.
The operation principle of the detonating device after the detonation of the blocking cylinder is that the detonating device detonates an exploder in the explosive loading cylinder 11 to detonate explosives arranged in the cylinder, the air pressure in the explosive loading cylinder after the detonation of the explosives rises sharply to push the piston 121 to move rapidly outwards in the guide cylinder 120 and push the fixing column 122 to prop into the side wall of the blast hole, so that the blocking cylinder is fixed, and the blocking cylinder has the effect of blocking the blast hole.
Further, in order to ensure that the fixing column can be jacked into the side wall of the blast hole after the explosive in the blocking cylinder is detonated, the method for determining the explosive input amount in the blocking cylinder comprises the following steps: firstly, obtaining a firmness factor f1 of the rock to be blasted currently, wherein the firmness factor f1 can be obtained through the type of the rock, and then 2 f 1P 0 (s 1/s 2) is not less than (m 1V 0/V1) C1 is not less than f 1P 0 (s 1/s 2), wherein P0 is atmospheric pressure, m1 is the mass of explosive filled in the cartridge, and is measured in kilograms, V0 is the explosive capacity value of the explosive, V1 is the volume of the cartridge, C1 is a pressure factor, and is measured in a range of 2.6 10 з -5.3 10 з, s1 is the cross-sectional area of a piston, s2 is the cross-sectional area of a fixed pillar, and is measured in square meters, after the explosive in the cartridge is blasted, the internal pressure rises to push the piston to move rapidly, so that the fixed on the side wall of the fixed pillar, and the side wall of the cartridge is fixed on the blast hole instantly; the amount of currently used explosive can be calculated through a formula 2 f 1P 0 (s 1/s 2) not less than (m 1V 0/V1) C1 not less than f 1P 0 (s 1/s 2), so that different explosives with different terrains can be scientifically selected, the fixed column of the blocking cylinder can be fully ejected, the explosive can be used as low as possible, the safety of construction is guaranteed, and the use cost of the explosive is saved.
Further, in order to ensure the blocking effect of the blocking barrel, the diameter of the barrel 10 is D1, the diameter of the blast hole is D2, and D1 is D2-0.05 × D2, and the distance D3 that the fixing column can extend from the side wall of the barrel is greater than or equal to (D2-D1) + B, wherein the value range of B is as follows: 20-50 mm.
And step seven, after the detonation is finished, recovering the blocking cylinder. After the blasting is accomplished, stifled a section of thick bamboo can also be retrieved and reuse, thereby can practice thrift the blasting cost, it explains be, retrieve the back to stifled a section of thick bamboo, need carry out the pressure release to stifled an inside and handle, the pressure release can be with its stationary a period, make its internal pressure just can open the lid after releasing from first through wires hole, of course, also can be through setting up the relief valve on the lid, carry out quick pressure release through the relief valve, use more than 5 back when stifled a section of thick bamboo, need wash the cartridge case of stifled a section of thick bamboo, the inside explosive residue of cartridge case that will block a section of thick bamboo clears up, thereby guarantee that the piston can nimble motion inside the guide cylinder, guarantee that cartridge case inside has sufficient capacity.
Further, as preferred embodiment, in order to be convenient for clear up and maintain stifled a section of thick bamboo be provided with the screw hole 101 of intercommunication cartridge case on the lateral wall of barrel 11, and guide cylinder threaded connection and threaded hole in, can be convenient for clear up cartridge case inside on the one hand through this kind of mode of setting up, on the other hand still is convenient for dismantle the guide cylinder to maintain or change the fixed column, improve the convenience that stifled a section of thick bamboo used.
Furthermore, under the condition of deep blasting, the depth of the blast hole is deep, a plurality of carbon dioxide fracturing pipes can be continuously arranged in the same blast hole, in this condition, a plurality of blocking barrels also need to be continuously arranged, and when the blocking barrels are arranged, the total length of the arrangement can be determined according to the depth H of the blast hole, so that the total length L of the blocking barrels is more than or equal to 1/2H.
Further, in order to ensure the blocking effect of the blocking barrel, the diameter of the barrel body is D1, the diameter of the blast hole is D2, and D1 is D2-0.05X D2, and the distance D3 that the fixed column can extend out of the side wall of the barrel body is more than or equal to (D2-D1) + B, wherein the value range of B is as follows: 20-50 mm.
Further, the barrel is kept away from the open-ended tip still is provided with buffering subassembly, buffering subassembly include one end with the spring that the barrel is connected and with the atress board that the other end of spring is connected, wherein the atress board deviates from the one side of barrel still is provided with spherical recess.
Further, referring to fig. 2 and 3, after the carbon dioxide cracking tube is detonated, high-pressure carbon dioxide gas is released, so that the carbon dioxide cracking tube can receive upward reaction force, the blocking cylinder directly contacts with the top of the carbon dioxide cracking tube and directly applies the reaction force to the blocking cylinder, the blocking cylinder instantaneously receives large impact force, and the buffer assembly is arranged below the blocking cylinder, so that the impact force on the cylinder body of the blocking cylinder can be buffered when the carbon dioxide cracking tube is detonated, the instantaneous impact force on the blocking cylinder can be reduced, the blocking cylinder is prevented from being loosened, and the working stability of the blocking cylinder is ensured; because its body can receive ascending reaction force when the carbon dioxide sends the burst pipe, set up spherical recess on the atress board to can increase the area of contact at atress board and carbon dioxide send the burst pipe top, avoid haring the body that carbon dioxide sent the burst pipe.
The invention provides a liquid carbon dioxide fracturing pipe differential delay control blasting method, which can seal a blast hole by replacing concrete with a blocking cylinder, can recycle the blocking cylinder after blasting, does not need to wait for the drying of the concrete when using the blocking cylinder, can improve the flexibility of construction and improve the working efficiency, explodes explosive used by the blocking cylinder in a closed space, is safe to use, controls the carbon dioxide fracturing pipe to be detonated after the interval of 50-100 milliseconds after the blocking cylinder is detonated, can ensure that the fracturing pipe works after the blocking cylinder and the inner wall of the blast hole are fully fixed, can fully exert the blocking effect of the blocking cylinder, ensures the limiting effect on high-pressure carbon dioxide gas, ensures the blasting effect, and on the other hand controls the interval time of the carbon dioxide fracturing pipe in the interval blast hole to be 25-50 milliseconds, stress waves generated after the initiation in the adjacent blast holes can be separated in time and space, and the main vibration section is staggered, so that the blasting earthquake effect and the phenomenon of stone splashing can be greatly reduced, and the blasting safety can be further improved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (4)
1. A liquid carbon dioxide fracturing pipe differential delay control blasting method is characterized by comprising the following steps:
drilling blast holes with preset quantity and preset depth at a to-be-blasted place;
filling a certain amount of liquid carbon dioxide into the carbon dioxide fracturing pipe according to the rock physical structure conditions of the site to be blasted;
placing the prepared carbon dioxide fracturing pipes in the blast hole one by one;
filling a certain amount of explosive into the blast hole blocking barrel according to the rock physical structure conditions of the current to-be-blasted site, penetrating the detonating lead out of the first threading hole, and locking the cover body to the blocking barrel;
placing the cover bodies of the blocking cylinders upwards inside the blast holes one by one, and enabling the bottoms of the blocking cylinders to be in contact with the tops of the carbon dioxide cracking tubes;
controlling the carbon dioxide fracturing pipes in the plurality of blast holes to detonate one by one according to the arrangement sequence, wherein the detonation interval time of the carbon dioxide fracturing pipes in the adjacent blast holes is t1, and the value range of t1 is 25-50 milliseconds; in the same blast hole, firstly, detonating explosive in the plug cylinder to fix the plug and the inner wall of the blast hole, and then detonating a carbon dioxide cracking tube after 50-100 milliseconds;
and seventhly, after blasting is finished, recovering the blocking cylinder and the carbon dioxide cracking pipe.
2. The liquid carbon dioxide fracturing pipe differential delay controlled blasting method according to claim 1, wherein in the fifth step, after the carbon dioxide fracturing pipe is placed inside the blast hole in the same blast hole, the detonating cord of the carbon dioxide fracturing pipe is penetrated out from bottom to top from the second threading hole on the blocking cylinder, and then the blocking cylinder is placed inside the blast hole.
3. The liquid carbon dioxide fracturing pipe differential delay controlled blasting method according to claim 1, wherein in the fourth step, the charging step for blocking the inside of the barrel comprises the following steps: firstly, determining the quantity of explosive to be filled in the gun barrel according to the rock physical structure condition of the current to-be-blasted area, taking a certain quantity of explosive, opening the cover body, filling half of the explosive into the explosive filling barrel of the blocking barrel through the explosive filling pipe, then filling the explosive into the detonator, extending the detonating cord of the detonator out of the blocking barrel, then filling the rest of the explosive into the explosive filling barrel, penetrating the detonating cord of the detonator out through the first threading hole, and then locking the cover body onto the blocking barrel.
4. The liquid carbon dioxide fracturing pipe differential delay controlled blasting method according to claim 1, wherein when the blocking barrel is arranged, a plurality of carbon dioxide fracturing pipes can be used in the same blast hole according to the depth H of the blast hole, and a plurality of the blocking barrels are used in the same blast hole, so that the total length L of the blocking barrel is greater than or equal to 1/2H.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164836A (en) * | 2021-12-31 | 2022-03-11 | 惠州大亚湾市政基础设施有限公司 | Excavation blasting method for foundation pit earth and stone |
| CN114183118A (en) * | 2021-12-31 | 2022-03-15 | 石家庄铁道大学 | Infiltration mining method and device for infiltration-increasing area of low-permeability sandstone uranium ore and terminal equipment |
| CN116147439A (en) * | 2022-09-09 | 2023-05-23 | 石家庄铁道大学 | Carbon dioxide blasting device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114164836A (en) * | 2021-12-31 | 2022-03-11 | 惠州大亚湾市政基础设施有限公司 | Excavation blasting method for foundation pit earth and stone |
| CN114183118A (en) * | 2021-12-31 | 2022-03-15 | 石家庄铁道大学 | Infiltration mining method and device for infiltration-increasing area of low-permeability sandstone uranium ore and terminal equipment |
| CN114183118B (en) * | 2021-12-31 | 2024-05-24 | 石家庄铁道大学 | Enhanced-permeability in-situ leaching mining method and device for hyposmosis sandstone uranium ores and terminal equipment |
| CN116147439A (en) * | 2022-09-09 | 2023-05-23 | 石家庄铁道大学 | Carbon dioxide blasting device and method |
| CN116147439B (en) * | 2022-09-09 | 2024-05-10 | 石家庄铁道大学 | Carbon dioxide blasting device and method |
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| CN113310374B (en) | 2022-02-08 |
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